Develop Reference

Issue with Spring and MongoDB Atlas connection: Network is unreachable

I'm creating a simple web app for class that will use a MongoDB Atlas database, but I can't make any network connection. I have a user account set up, have 0.0.0.0/0 whitelisted, and believe I have the code setup correctly for a connection. When I try running to test the app, I get java.net.SocketException: Network is unreachable all over the place. With the console log below, does anyone see an obvious error? I have tried the ports to make sure they are open and haven't found an error, not sure why the connection totally fails.
application.properties:
# MongoDB Atlas - Connection
spring.data.mongodb.database=bookclub
spring.data.mongodb.uri=mongodb+srv://bookclub_user:<pwd>#cluster0.ne3yt.mongodb.net/<database>?retryWrites=true&w=majority
pom.xml:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.5.4</version>
</parent>
<groupId>com.bookclub</groupId>
<artifactId>bookclub</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>bookclub</name>
<description>CIS 530 Bookclub Project</description>
<properties>
<java.version>16</java.version>
</properties>
<dependencies>
<!-- Form validation fields -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-validation</artifactId>
<version>2.5.5</version>
</dependency>
<!-- Thymeleaf template engine -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<!-- MongoDB Driver -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-mongodb</artifactId>
</dependency>
<!-- Spring Web -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- Spring Test -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<!-- Spring devtools -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.jetbrains</groupId>
<artifactId>annotations</artifactId>
<version>22.0.0</version>
<scope>compile</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
NEW console output:
:: Spring Boot :: (v2.5.4)
2021-10-04 04:52:24.130 INFO 36899 --- [ restartedMain] com.bookclub.BookclubApplication : Starting BookclubApplication using Java 16.0.2 on C02YPFQ9LVCG with PID 36899 (/Users/abecthold/Courses/cis-530/bookclub/target/classes started by abecthold in /Users/abecthold/Courses/cis-530/bookclub)
2021-10-04 04:52:24.132 INFO 36899 --- [ restartedMain] com.bookclub.BookclubApplication : No active profile set, falling back to default profiles: default
2021-10-04 04:52:24.169 INFO 36899 --- [ restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : Devtools property defaults active! Set 'spring.devtools.add-properties' to 'false' to disable
2021-10-04 04:52:24.169 INFO 36899 --- [ restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : For additional web related logging consider setting the 'logging.level.web' property to 'DEBUG'
2021-10-04 04:52:24.574 INFO 36899 --- [ restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data MongoDB repositories in DEFAULT mode.
2021-10-04 04:52:24.582 INFO 36899 --- [ restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 6 ms. Found 0 MongoDB repository interfaces.
2021-10-04 04:52:24.914 INFO 36899 --- [ restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)
2021-10-04 04:52:24.921 INFO 36899 --- [ restartedMain] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2021-10-04 04:52:24.921 INFO 36899 --- [ restartedMain] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.52]
2021-10-04 04:52:24.968 INFO 36899 --- [ restartedMain] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2021-10-04 04:52:24.968 INFO 36899 --- [ restartedMain] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 798 ms
2021-10-04 04:52:25.059 INFO 36899 --- [ restartedMain] org.mongodb.driver.cluster : Cluster created with settings {hosts=[cluster0.ne3yt.mongodb.net:27017], mode=SINGLE, requiredClusterType=UNKNOWN, serverSelectionTimeout='30000 ms'}
2021-10-04 04:52:25.127 INFO 36899 --- [ngodb.net:27017] org.mongodb.driver.cluster : Exception in monitor thread while connecting to server cluster0.ne3yt.mongodb.net:27017
com.mongodb.MongoSocketException: cluster0.ne3yt.mongodb.net: nodename nor servname provided, or not known
at com.mongodb.ServerAddress.getSocketAddresses(ServerAddress.java:211) ~[mongodb-driver-core-4.2.3.jar:na]
at com.mongodb.internal.connection.SocketStream.initializeSocket(SocketStream.java:75) ~[mongodb-driver-core-4.2.3.jar:na]
at com.mongodb.internal.connection.SocketStream.open(SocketStream.java:65) ~[mongodb-driver-core-4.2.3.jar:na]
at com.mongodb.internal.connection.InternalStreamConnection.open(InternalStreamConnection.java:143) ~[mongodb-driver-core-4.2.3.jar:na]
at com.mongodb.internal.connection.DefaultServerMonitor$ServerMonitorRunnable.lookupServerDescription(DefaultServerMonitor.java:188) ~[mongodb-driver-core-4.2.3.jar:na]
at com.mongodb.internal.connection.DefaultServerMonitor$ServerMonitorRunnable.run(DefaultServerMonitor.java:144) ~[mongodb-driver-core-4.2.3.jar:na]
at java.base/java.lang.Thread.run(Thread.java:831) ~[na:na]
Caused by: java.net.UnknownHostException: cluster0.ne3yt.mongodb.net: nodename nor servname provided, or not known
at java.base/java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method) ~[na:na]
at java.base/java.net.InetAddress$PlatformNameService.lookupAllHostAddr(InetAddress.java:932) ~[na:na]
at java.base/java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1517) ~[na:na]
at java.base/java.net.InetAddress$NameServiceAddresses.get(InetAddress.java:851) ~[na:na]
at java.base/java.net.InetAddress.getAllByName0(InetAddress.java:1507) ~[na:na]
at java.base/java.net.InetAddress.getAllByName(InetAddress.java:1366) ~[na:na]
at java.base/java.net.InetAddress.getAllByName(InetAddress.java:1300) ~[na:na]
at com.mongodb.ServerAddress.getSocketAddresses(ServerAddress.java:203) ~[mongodb-driver-core-4.2.3.jar:na]
... 6 common frames omitted
2021-10-04 04:52:25.185 INFO 36899 --- [ restartedMain] o.s.b.d.a.OptionalLiveReloadServer : LiveReload server is running on port 35729
2021-10-04 04:52:25.394 INFO 36899 --- [ restartedMain] o.s.b.a.w.s.WelcomePageHandlerMapping : Adding welcome page template: index
2021-10-04 04:52:25.485 INFO 36899 --- [ restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path ''
2021-10-04 04:52:25.493 INFO 36899 --- [ restartedMain] com.bookclub.BookclubApplication : Started BookclubApplication in 1.608 seconds (JVM running for 2.09)
2021-10-04 04:52:35.129 INFO 36899 --- [ngodb.net:27017] org.mongodb.driver.cluster : Exception in monitor thread while connecting to server cluster0.ne3yt.mongodb.net:27017
com.mongodb.MongoSocketException: cluster0.ne3yt.mongodb.net
at com.mongodb.ServerAddress.getSocketAddresses(ServerAddress.java:211) ~[mongodb-driver-core-4.2.3.jar:na]
at com.mongodb.internal.connection.SocketStream.initializeSocket(SocketStream.java:75) ~[mongodb-driver-core-4.2.3.jar:na]
at com.mongodb.internal.connection.SocketStream.open(SocketStream.java:65) ~[mongodb-driver-core-4.2.3.jar:na]
at com.mongodb.internal.connection.InternalStreamConnection.open(InternalStreamConnection.java:143) ~[mongodb-driver-core-4.2.3.jar:na]
at com.mongodb.internal.connection.DefaultServerMonitor$ServerMonitorRunnable.lookupServerDescription(DefaultServerMonitor.java:188) ~[mongodb-driver-core-4.2.3.jar:na]
at com.mongodb.internal.connection.DefaultServerMonitor$ServerMonitorRunnable.run(DefaultServerMonitor.java:144) ~[mongodb-driver-core-4.2.3.jar:na]
at java.base/java.lang.Thread.run(Thread.java:831) ~[na:na]
Caused by: java.net.UnknownHostException: cluster0.ne3yt.mongodb.net
at java.base/java.net.InetAddress$CachedAddresses.get(InetAddress.java:800) ~[na:na]
at java.base/java.net.InetAddress$NameServiceAddresses.get(InetAddress.java:886) ~[na:na]
at java.base/java.net.InetAddress.getAllByName0(InetAddress.java:1507) ~[na:na]
at java.base/java.net.InetAddress.getAllByName(InetAddress.java:1366) ~[na:na]
at java.base/java.net.InetAddress.getAllByName(InetAddress.java:1300) ~[na:na]
at com.mongodb.ServerAddress.getSocketAddresses(ServerAddress.java:203) ~[mongodb-driver-core-4.2.3.jar:na]
... 6 common frames omitted
New errors on web view when trying to connect through the app:
There was an unexpected error (type=Internal Server Error, status=500).
Timed out after 30000 ms while waiting to connect. Client view of cluster state is {type=UNKNOWN, servers=[{address=cluster0.ne3yt.mongodb.net:27017, type=UNKNOWN, state=CONNECTING, exception={com.mongodb.MongoSocketException: cluster0.ne3yt.mongodb.net}, caused by {java.net.UnknownHostException: cluster0.ne3yt.mongodb.net}}]; nested exception is com.mongodb.MongoTimeoutException: Timed out after 30000 ms while waiting to connect. Client view of cluster state is {type=UNKNOWN, servers=[{address=cluster0.ne3yt.mongodb.net:27017, type=UNKNOWN, state=CONNECTING, exception={com.mongodb.MongoSocketException: cluster0.ne3yt.mongodb.net}, caused by {java.net.UnknownHostException: cluster0.ne3yt.mongodb.net}}]
org.springframework.dao.DataAccessResourceFailureException: Timed out after 30000 ms while waiting to connect. Client view of cluster state is {type=UNKNOWN, servers=[{address=cluster0.ne3yt.mongodb.net:27017, type=UNKNOWN, state=CONNECTING, exception={com.mongodb.MongoSocketException: cluster0.ne3yt.mongodb.net}, caused by {java.net.UnknownHostException: cluster0.ne3yt.mongodb.net}}]; nested exception is com.mongodb.MongoTimeoutException: Timed out after 30000 ms while waiting to connect. Client view of cluster state is {type=UNKNOWN, servers=[{address=cluster0.ne3yt.mongodb.net:27017, type=UNKNOWN, state=CONNECTING, exception={com.mongodb.MongoSocketException: cluster0.ne3yt.mongodb.net}, caused by {java.net.UnknownHostException: cluster0.ne3yt.mongodb.net}}
Caused by: com.mongodb.MongoTimeoutException: Timed out after 30000 ms while waiting to connect. Client view of cluster state is {type=UNKNOWN, servers=[{address=cluster0.ne3yt.mongodb.net:27017, type=UNKNOWN, state=CONNECTING, exception={com.mongodb.MongoSocketException: cluster0.ne3yt.mongodb.net}, caused by {java.net.UnknownHostException: cluster0.ne3yt.mongodb.net}}]

Spring Boot Data JPA Unable to Connect to VirtualBox Ubuntu MySQL Server

I've posted a relatively similar question in the past here. I am attempting to configure my environment to work with VirtualBox so I can use Linux related tools to manage the servers. Currently, I am attempting to connect my Spring Boot web application to my Ubuntu MySQL server on my VirtualBox machine.
Problem
When attempting to connect to my MySQL server with my Spring Boot application, I received this error message:
2020-06-06 08:16:02.390 INFO 2936 --- [ restartedMain] c.c.mvcblog.SpringMvcBlogApplication : Starting SpringMvcBlogApplication on DESKTOP-AS2P0GJ with PID 2936 (C:\Users\rocke\IdeaProjects\mvc-blog\target\classes started by rocke in C:\Users\rocke\IdeaProjects\mvc-blog)
2020-06-06 08:16:02.396 INFO 2936 --- [ restartedMain] c.c.mvcblog.SpringMvcBlogApplication : No active profile set, falling back to default profiles: default
2020-06-06 08:16:02.480 INFO 2936 --- [ restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : Devtools property defaults active! Set 'spring.devtools.add-properties' to 'false' to disable
2020-06-06 08:16:02.480 INFO 2936 --- [ restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : For additional web related logging consider setting the 'logging.level.web' property to 'DEBUG'
2020-06-06 08:16:04.076 INFO 2936 --- [ restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFERRED mode.
2020-06-06 08:16:04.215 INFO 2936 --- [ restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 127ms. Found 2 JPA repository interfaces.
2020-06-06 08:16:05.913 INFO 2936 --- [ restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)
2020-06-06 08:16:05.940 INFO 2936 --- [ restartedMain] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2020-06-06 08:16:05.940 INFO 2936 --- [ restartedMain] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.35]
2020-06-06 08:16:06.141 INFO 2936 --- [ restartedMain] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2020-06-06 08:16:06.141 INFO 2936 --- [ restartedMain] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 3660 ms
2020-06-06 08:16:06.474 INFO 2936 --- [ restartedMain] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor'
2020-06-06 08:16:06.572 INFO 2936 --- [ task-1] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [name: default]
2020-06-06 08:16:06.672 WARN 2936 --- [ restartedMain] JpaBaseConfiguration$JpaWebConfiguration : spring.jpa.open-in-view is enabled by default. Therefore, database queries may be performed during view rendering. Explicitly configure spring.jpa.open-in-view to disable this warning
2020-06-06 08:16:06.788 INFO 2936 --- [ task-1] org.hibernate.Version : HHH000412: Hibernate ORM core version 5.4.15.Final
2020-06-06 08:16:07.055 INFO 2936 --- [ task-1] o.hibernate.annotations.common.Version : HCANN000001: Hibernate Commons Annotations {5.1.0.Final}
2020-06-06 08:16:07.205 INFO 2936 --- [ task-1] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting...
2020-06-06 08:16:10.357 ERROR 2936 --- [ task-1] com.zaxxer.hikari.pool.HikariPool : HikariPool-1 - Exception during pool initialization.
com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
at com.mysql.cj.jdbc.exceptions.SQLError.createCommunicationsException(SQLError.java:174) ~[mysql-connector-java-8.0.20.jar:8.0.20]
at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:64) ~[mysql-connector-java-8.0.20.jar:8.0.20]
at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:836) ~[mysql-connector-java-8.0.20.jar:8.0.20]
at com.mysql.cj.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:456) ~[mysql-connector-java-8.0.20.jar:8.0.20]
at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:246) ~[mysql-connector-java-8.0.20.jar:8.0.20]
at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:197) ~[mysql-connector-java-8.0.20.jar:8.0.20]
at com.zaxxer.hikari.util.DriverDataSource.getConnection(DriverDataSource.java:138) ~[HikariCP-3.4.5.jar:na]
at com.zaxxer.hikari.pool.PoolBase.newConnection(PoolBase.java:358) ~[HikariCP-3.4.5.jar:na]
at com.zaxxer.hikari.pool.PoolBase.newPoolEntry(PoolBase.java:206) ~[HikariCP-3.4.5.jar:na]
at com.zaxxer.hikari.pool.HikariPool.createPoolEntry(HikariPool.java:477) ~[HikariCP-3.4.5.jar:na]
at com.zaxxer.hikari.pool.HikariPool.checkFailFast(HikariPool.java:560) ~[HikariCP-3.4.5.jar:na]
at com.zaxxer.hikari.pool.HikariPool.<init>(HikariPool.java:115) ~[HikariCP-3.4.5.jar:na]
at com.zaxxer.hikari.HikariDataSource.getConnection(HikariDataSource.java:112) ~[HikariCP-3.4.5.jar:na]
at org.hibernate.engine.jdbc.connections.internal.DatasourceConnectionProviderImpl.getConnection(DatasourceConnectionProviderImpl.java:122) ~[hibernate-core-5.4.15.Final.jar:5.4.15.Final]
at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator$ConnectionProviderJdbcConnectionAccess.obtainConnection(JdbcEnvironmentInitiator.java:180) ~[hibernate-core-5.4.15.Final.jar:5.4.15.Final]
at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.initiateService(JdbcEnvironmentInitiator.java:68) ~[hibernate-core-5.4.15.Final.jar:5.4.15.Final]
at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.initiateService(JdbcEnvironmentInitiator.java:35) ~[hibernate-core-5.4.15.Final.jar:5.4.15.Final]
at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.initiateService(StandardServiceRegistryImpl.java:101) ~[hibernate-core-5.4.15.Final.jar:5.4.15.Final]
at org.hibernate.service.internal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:263) ~[hibernate-core-5.4.15.Final.jar:5.4.15.Final]
at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:237) ~[hibernate-core-5.4.15.Final.jar:5.4.15.Final]
at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:214) ~[hibernate-core-5.4.15.Final.jar:5.4.15.Final]
at org.hibernate.id.factory.internal.DefaultIdentifierGeneratorFactory.injectServices(DefaultIdentifierGeneratorFactory.java:152) ~[hibernate-core-5.4.15.Final.jar:5.4.15.Final]
at org.hibernate.service.internal.AbstractServiceRegistryImpl.injectDependencies(AbstractServiceRegistryImpl.java:286) ~[hibernate-core-5.4.15.Final.jar:5.4.15.Final]
at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:243) ~[hibernate-core-5.4.15.Final.jar:5.4.15.Final]
at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:214) ~[hibernate-core-5.4.15.Final.jar:5.4.15.Final]
at org.hibernate.boot.internal.InFlightMetadataCollectorImpl.<init>(InFlightMetadataCollectorImpl.java:176) ~[hibernate-core-5.4.15.Final.jar:5.4.15.Final]
at org.hibernate.boot.model.process.spi.MetadataBuildingProcess.complete(MetadataBuildingProcess.java:118) ~[hibernate-core-5.4.15.Final.jar:5.4.15.Final]
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.metadata(EntityManagerFactoryBuilderImpl.java:1214) ~[hibernate-core-5.4.15.Final.jar:5.4.15.Final]
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:1245) ~[hibernate-core-5.4.15.Final.jar:5.4.15.Final]
at org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory(SpringHibernateJpaPersistenceProvider.java:58) ~[spring-orm-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:365) ~[spring-orm-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:391) ~[spring-orm-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) ~[na:na]
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) ~[na:na]
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) ~[na:na]
at java.base/java.lang.Thread.run(Thread.java:834) ~[na:na]
Caused by: com.mysql.cj.exceptions.CJCommunicationsException: Communications link failure
A handful of resources I found online related to this topic were dealing with invalid login attempts, invalid MySQL queries, or invalid dialects.
Debugging Information
I am able to ping the virtual machine when actively running. I ended up installing MySQL directly onto my local machine (Windows 10) and attempted to connect directly that way. After squashing a few bugs related to me using the wrong dialect, I was able to connect directly to my MySQL database on my local machine. However, switching back at that point to my Ubuntu hosted MySQL server still resulted in the same error message. I have also verified that the MySQL service is running. Lastly, I've also tried adding the 3306 port for MySQL.
Code
You can find my current repository here. I'll show the most important pieces of my project here.
application.properties
spring.datasource.driver-class-name = com.mysql.cj.jdbc.Driver
spring.datasource.url=jdbc:mysql://192.168.0.101:3306/blog_db
spring.datasource.username=root
spring.datasource.password=mIThl
# Configure Hibernate DDL mode: create / update
spring.jpa.properties.hibernate.hbm2ddl.auto = create
spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQL5Dialect
Maven Pom Dependencies:
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<version>2.3.0.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
<!-- https://mvnrepository.com/artifact/javax.validation/validation-api -->
<dependency>
<groupId>javax.validation</groupId>
<artifactId>validation-api</artifactId>
<version>2.0.1.Final</version>
</dependency>
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
Additionally, my Spring Boot Parent version is 2.3.0.RELEASE.
I greatly appreciate any help given! I'm eager to improve my development process by incorporating VirtualBox VM's and am hoping to be able to find a resolution for this issue. Thank you!

Error on start of Spring Boot Application (Vaadin)

I tried to change port of Spring Boot application, activated Vaadin PRO, run in Eclipse/PowerShell, run in debug and without debug... I have node.js 12.16.1 (includes npm 6.13.4) installed too. I always get an error:
java.lang.RuntimeException: Unable to initialize Vaadin DevModeHandler
:: Spring Boot :: (v2.2.4.RELEASE)
2020-03-16 07:34:43.681 INFO 12284 --- [ main] s.q.myapp.ui.MyAppWebApplication : Starting MyAppWebApplication on luigi10 with PID 12284 (C:\Workspaces\myapp\myapp\myapp-web\target\classes started by luigi.k in C:\Workspaces\myapp\myapp\myapp-web)
2020-03-16 07:34:43.684 INFO 12284 --- [ main] s.q.myapp.ui.MyAppWebApplication : No active profile set, falling back to default profiles: default
2020-03-16 07:34:44.734 INFO 12284 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8082 (http)
2020-03-16 07:34:44.744 INFO 12284 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2020-03-16 07:34:44.745 INFO 12284 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.30]
2020-03-16 07:34:44.936 INFO 12284 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2020-03-16 07:34:44.936 INFO 12284 --- [ main] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 1210 ms
2020-03-16 07:34:47.109 INFO 12284 --- [ main] c.v.f.s.VaadinServletContextInitializer : Search for subclasses and classes with annotations took 1 seconds
2020-03-16 07:34:47.112 INFO 12284 --- [ main] c.v.f.server.startup.DevModeInitializer : Starting dev-mode updaters in C:\Workspaces\myapp\myapp\myapp-web folder.
2020-03-16 07:34:47.141 INFO 12284 --- [ main] dev-updater : Visited 122 classes. Took 19 ms.
2020-03-16 07:34:47.156 INFO 12284 --- [ main] dev-updater : Skipping `npm install`.
2020-03-16 07:34:47.156 INFO 12284 --- [ main] dev-updater : Copying frontend resources from jar files ...
2020-03-16 07:34:47.219 INFO 12284 --- [ main] dev-updater : Visited 12 resources. Took 63 ms.
2020-03-16 07:34:47.286 INFO 12284 --- [ main] dev-updater : Updated C:\Workspaces\myapp\myapp\myapp-web\target\frontend\generated-flow-imports.js
2020-03-16 07:34:49.562 INFO 12284 --- [ main] dev-webpack : Starting webpack-dev-server, port: 57479 dir: C:\Workspaces\myapp\myapp\myapp-web
2020-03-16 07:34:49.577 INFO 12284 --- [ main] dev-webpack : Running webpack to compile frontend resources. This may take a moment, please stand by...
2020-03-16 07:34:50.406 ERROR 12284 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Exception sending context initialized event to listener instance of class [com.vaadin.flow.spring.VaadinServletContextInitializer$DevModeServletContextListener]
java.lang.RuntimeException: Unable to initialize Vaadin DevModeHandler
at com.vaadin.flow.spring.VaadinServletContextInitializer$DevModeServletContextListener.contextInitialized(VaadinServletContextInitializer.java:347) ~[vaadin-spring-12.1.2.jar:na]
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4683) ~[tomcat-embed-core-9.0.30.jar:9.0.30]
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5146) ~[tomcat-embed-core-9.0.30.jar:9.0.30]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) ~[tomcat-embed-core-9.0.30.jar:9.0.30]
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1384) ~[tomcat-embed-core-9.0.30.jar:9.0.30]
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1374) ~[tomcat-embed-core-9.0.30.jar:9.0.30]
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) ~[na:na]
at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75) ~[tomcat-embed-core-9.0.30.jar:9.0.30]
at java.base/java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:140) ~[na:na]
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:909) ~[tomcat-embed-core-9.0.30.jar:9.0.30]
at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:841) ~[tomcat-embed-core-9.0.30.jar:9.0.30]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) ~[tomcat-embed-core-9.0.30.jar:9.0.30]
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1384) ~[tomcat-embed-core-9.0.30.jar:9.0.30]
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1374) ~[tomcat-embed-core-9.0.30.jar:9.0.30]
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) ~[na:na]
at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75) ~[tomcat-embed-core-9.0.30.jar:9.0.30]
at java.base/java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:140) ~[na:na]
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:909) ~[tomcat-embed-core-9.0.30.jar:9.0.30]
at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:262) ~[tomcat-embed-core-9.0.30.jar:9.0.30]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) ~[tomcat-embed-core-9.0.30.jar:9.0.30]
at org.apache.catalina.core.StandardService.startInternal(StandardService.java:421) ~[tomcat-embed-core-9.0.30.jar:9.0.30]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) ~[tomcat-embed-core-9.0.30.jar:9.0.30]
at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:930) ~[tomcat-embed-core-9.0.30.jar:9.0.30]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) ~[tomcat-embed-core-9.0.30.jar:9.0.30]
at org.apache.catalina.startup.Tomcat.start(Tomcat.java:459) ~[tomcat-embed-core-9.0.30.jar:9.0.30]
at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.initialize(TomcatWebServer.java:107) ~[spring-boot-2.2.4.RELEASE.jar:2.2.4.RELEASE]
at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.<init>(TomcatWebServer.java:88) ~[spring-boot-2.2.4.RELEASE.jar:2.2.4.RELEASE]
at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.getTomcatWebServer(TomcatServletWebServerFactory.java:438) ~[spring-boot-2.2.4.RELEASE.jar:2.2.4.RELEASE]
at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.getWebServer(TomcatServletWebServerFactory.java:191) ~[spring-boot-2.2.4.RELEASE.jar:2.2.4.RELEASE]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.createWebServer(ServletWebServerApplicationContext.java:180) ~[spring-boot-2.2.4.RELEASE.jar:2.2.4.RELEASE]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh(ServletWebServerApplicationContext.java:153) ~[spring-boot-2.2.4.RELEASE.jar:2.2.4.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:544) ~[spring-context-5.2.3.RELEASE.jar:5.2.3.RELEASE]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141) ~[spring-boot-2.2.4.RELEASE.jar:2.2.4.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747) ~[spring-boot-2.2.4.RELEASE.jar:2.2.4.RELEASE]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) ~[spring-boot-2.2.4.RELEASE.jar:2.2.4.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) ~[spring-boot-2.2.4.RELEASE.jar:2.2.4.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) ~[spring-boot-2.2.4.RELEASE.jar:2.2.4.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215) ~[spring-boot-2.2.4.RELEASE.jar:2.2.4.RELEASE]
at com.comp.myapp.ui.MyAppWebApplication.main(MyAppWebApplication.java:10) ~[classes/:na]
Caused by: javax.servlet.ServletException: java.lang.IllegalStateException: Webpack exited prematurely
at com.vaadin.flow.server.startup.DevModeInitializer.initDevModeHandler(DevModeInitializer.java:301) ~[flow-server-2.1.5.jar:2.1.5]
at com.vaadin.flow.spring.VaadinServletContextInitializer$DevModeServletContextListener.contextInitialized(VaadinServletContextInitializer.java:344) ~[vaadin-spring-12.1.2.jar:na]
... 38 common frames omitted
Caused by: java.lang.IllegalStateException: Webpack exited prematurely
at com.vaadin.flow.server.DevModeHandler.<init>(DevModeHandler.java:202) ~[flow-server-2.1.5.jar:2.1.5]
at com.vaadin.flow.server.DevModeHandler.createInstance(DevModeHandler.java:299) ~[flow-server-2.1.5.jar:2.1.5]
at com.vaadin.flow.server.DevModeHandler.start(DevModeHandler.java:249) ~[flow-server-2.1.5.jar:2.1.5]
at com.vaadin.flow.server.DevModeHandler.start(DevModeHandler.java:226) ~[flow-server-2.1.5.jar:2.1.5]
at com.vaadin.flow.server.startup.DevModeInitializer.initDevModeHandler(DevModeInitializer.java:297) ~[flow-server-2.1.5.jar:2.1.5]
... 39 common frames omitted
2020-03-16 07:34:50.444 ERROR 12284 --- [ main] o.apache.catalina.core.StandardContext : One or more listeners failed to start. Full details will be found in the appropriate container log file
2020-03-16 07:34:50.445 ERROR 12284 --- [ main] o.apache.catalina.core.StandardContext : Context [] startup failed due to previous errors
2020-03-16 07:34:50.453 WARN 12284 --- [ main] o.a.c.loader.WebappClassLoaderBase : The web application [ROOT] appears to have started a thread named [Thread-1] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread:
java.base#11.0.2/java.net.PlainSocketImpl.accept0(Native Method)
java.base#11.0.2/java.net.PlainSocketImpl.socketAccept(PlainSocketImpl.java:159)
java.base#11.0.2/java.net.AbstractPlainSocketImpl.accept(AbstractPlainSocketImpl.java:458)
java.base#11.0.2/java.net.ServerSocket.implAccept(ServerSocket.java:551)
java.base#11.0.2/java.net.ServerSocket.accept(ServerSocket.java:519)
app//com.vaadin.flow.server.DevServerWatchDog$WatchDogServer.run(DevServerWatchDog.java:58)
java.base#11.0.2/java.lang.Thread.run(Thread.java:834)
2020-03-16 07:34:50.669 INFO 12284 --- [ main] o.apache.catalina.core.StandardService : Stopping service [Tomcat]
2020-03-16 07:34:50.675 WARN 12284 --- [ main] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.context.ApplicationContextException: Unable to start web server; nested exception is org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcat
2020-03-16 07:34:50.684 INFO 12284 --- [ main] ConditionEvaluationReportLoggingListener :
Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2020-03-16 07:34:50.693 ERROR 12284 --- [ main] o.s.boot.SpringApplication : Application run failed
org.springframework.context.ApplicationContextException: Unable to start web server; nested exception is org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcat
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh(ServletWebServerApplicationContext.java:156) ~[spring-boot-2.2.4.RELEASE.jar:2.2.4.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:544) ~[spring-context-5.2.3.RELEASE.jar:5.2.3.RELEASE]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141) ~[spring-boot-2.2.4.RELEASE.jar:2.2.4.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747) ~[spring-boot-2.2.4.RELEASE.jar:2.2.4.RELEASE]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) ~[spring-boot-2.2.4.RELEASE.jar:2.2.4.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) ~[spring-boot-2.2.4.RELEASE.jar:2.2.4.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) ~[spring-boot-2.2.4.RELEASE.jar:2.2.4.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215) ~[spring-boot-2.2.4.RELEASE.jar:2.2.4.RELEASE]
at com.comp.myapp.ui.MyAppWebApplication.main(MyAppWebApplication.java:10) ~[classes/:na]
Caused by: org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcat
at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.initialize(TomcatWebServer.java:126) ~[spring-boot-2.2.4.RELEASE.jar:2.2.4.RELEASE]
at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.<init>(TomcatWebServer.java:88) ~[spring-boot-2.2.4.RELEASE.jar:2.2.4.RELEASE]
at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.getTomcatWebServer(TomcatServletWebServerFactory.java:438) ~[spring-boot-2.2.4.RELEASE.jar:2.2.4.RELEASE]
at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.getWebServer(TomcatServletWebServerFactory.java:191) ~[spring-boot-2.2.4.RELEASE.jar:2.2.4.RELEASE]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.createWebServer(ServletWebServerApplicationContext.java:180) ~[spring-boot-2.2.4.RELEASE.jar:2.2.4.RELEASE]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh(ServletWebServerApplicationContext.java:153) ~[spring-boot-2.2.4.RELEASE.jar:2.2.4.RELEASE]
... 8 common frames omitted
Caused by: java.lang.IllegalStateException: StandardEngine[Tomcat].StandardHost[localhost].TomcatEmbeddedContext[] failed to start
at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.rethrowDeferredStartupExceptions(TomcatWebServer.java:171) ~[spring-boot-2.2.4.RELEASE.jar:2.2.4.RELEASE]
at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.initialize(TomcatWebServer.java:110) ~[spring-boot-2.2.4.RELEASE.jar:2.2.4.RELEASE]
... 13 common frames omitted
pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.2.4.RELEASE</version>
<relativePath /> <!-- lookup parent from repository -->
</parent>
<groupId>com.corp</groupId>
<artifactId>myapp-web</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>myapp-web</name>
<description>WEB for MyApp</description>
<properties>
<java.version>11</java.version>
<vaadin.version>14.1.17</vaadin.version>
</properties>
<repositories>
<repository>
<id>central</id>
<url>https://repo.maven.apache.org/maven2</url>
<snapshots>
<enabled>false</enabled>
</snapshots>
</repository>
<repository>
<id>vaadin-addons</id>
<url>https://maven.vaadin.com/vaadin-addons</url>
<snapshots>
<enabled>false</enabled>
</snapshots>
</repository>
</repositories>
<dependencies>
<dependency>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-crud-flow</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>com.vaadin</groupId>
<artifactId>vaadin</artifactId>
<exclusions>
<exclusion>
<groupId>com.vaadin.webjar</groupId>
<artifactId>*</artifactId>
</exclusion>
<exclusion>
<groupId>org.webjars.bowergithub.insites</groupId>
<artifactId>*</artifactId>
</exclusion>
<exclusion>
<groupId>org.webjars.bowergithub.polymer</groupId>
<artifactId>*</artifactId>
</exclusion>
<exclusion>
<groupId>org.webjars.bowergithub.polymerelements</groupId>
<artifactId>*</artifactId>
</exclusion>
<exclusion>
<groupId>org.webjars.bowergithub.vaadin</groupId>
<artifactId>*</artifactId>
</exclusion>
<exclusion>
<groupId>org.webjars.bowergithub.webcomponents</groupId>
<artifactId>*</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-bom</artifactId>
<version>${vaadin.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
The solution, that worked for me:
I had node_modules folder checkout from GIT. I deleted all modules from folder node_modules and file package-lock.json too. Then I ran Spring Boot application and automatically started 'npm install' and generated new modules. Application was starting without error.

Run mvn clean package -Pproduction following by Vaadin documentation. It works for me.

Run mvn clean install. This is a basic of work with Vaadin.
If you have any problem with Vaadin at first rebuild the project.

I am trying to stand up a Eureka Registry service, however, the Eureka server stops immediately after start

I am trying to stand up a spring cloud Eureka Server at my local machine by following instruction from Spring cloud website, however, the server was shutdown right after started, see below log files.
Here is the log file:
2018-07-16 11:23:15.313 INFO 10792 --- [ main] o.s.c.support.DefaultLifecycleProcessor : Starting beans in phase 0
2018-07-16 11:23:15.320 INFO 10792 --- [ Thread-12] o.s.c.n.e.server.EurekaServerBootstrap : Setting the eureka configuration..
2018-07-16 11:23:15.322 INFO 10792 --- [ Thread-12] o.s.c.n.e.server.EurekaServerBootstrap : Eureka data center value eureka.datacenter is not set, defaulting to default
2018-07-16 11:23:15.322 INFO 10792 --- [ Thread-12] o.s.c.n.e.server.EurekaServerBootstrap : Eureka environment value eureka.environment is not set, defaulting to test
2018-07-16 11:23:15.347 INFO 10792 --- [ Thread-12] o.s.c.n.e.server.EurekaServerBootstrap : isAws returned false
2018-07-16 11:23:15.349 INFO 10792 --- [ Thread-12] o.s.c.n.e.server.EurekaServerBootstrap : Initialized server context
2018-07-16 11:23:15.350 INFO 10792 --- [ Thread-12] c.n.e.r.PeerAwareInstanceRegistryImpl : Got 1 instances from neighboring DS node
2018-07-16 11:23:15.350 INFO 10792 --- [ Thread-12] c.n.e.r.PeerAwareInstanceRegistryImpl : Renew threshold is: 1
2018-07-16 11:23:15.351 INFO 10792 --- [ Thread-12] c.n.e.r.PeerAwareInstanceRegistryImpl : Changing status to UP
2018-07-16 11:23:15.399 INFO 10792 --- [ main] c.c.E.EurekaServiceApplicationTests : Started EurekaServiceApplicationTests in 10.859 seconds (JVM running for 13.307)
2018-07-16 11:23:15.435 INFO 10792 --- [ Thread-12] e.s.EurekaServerInitializerConfiguration : Started Eureka Server
2018-07-16 11:23:15.728 INFO 10792 --- [ Thread-13] o.s.w.c.s.GenericWebApplicationContext : Closing org.springframework.web.context.support.GenericWebApplicationContext#72209d93: startup date [Mon Jul 16 11:23:07 EDT 2018]; parent: org.springframework.context.annotation.AnnotationConfigApplicationContext#6326d182
2018-07-16 11:23:15.735 INFO 10792 --- [ Thread-13] o.s.c.n.e.s.EurekaServiceRegistry : Unregistering application EurekaService with eureka with status DOWN
2018-07-16 11:23:15.740 INFO 10792 --- [ Thread-13] o.s.c.support.DefaultLifecycleProcessor : Stopping beans in phase 0
2018-07-16 11:23:15.743 INFO 10792 --- [ Thread-13] c.n.eureka.DefaultEurekaServerContext : Shutting down ...
2018-07-16 11:23:15.748 INFO 10792 --- [ Thread-13] c.n.eureka.DefaultEurekaServerContext : Shut down
2018-07-16 11:23:15.752 INFO 10792 --- [ Thread-13] com.netflix.discovery.DiscoveryClient : Shutting down DiscoveryClient ...
2018-07-16 11:23:15.752 INFO 10792 --- [ Thread-13] com.netflix.discovery.DiscoveryClient : Completed shut down of DiscoveryClient
Here is the POM file:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.cyanne</groupId>
<artifactId>EurekaService</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>EurekaService</name>
<description>Eureka Service for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.3.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>10</java.version>
<spring-cloud.version>Finchley.RELEASE</spring-cloud.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>${spring-cloud.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
Here is my class file:
package com.cyanne.EurekaService;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;
#SpringBootApplication
#EnableEurekaServer
public class EurekaServiceApplication {
public static void main(String[] args) {
SpringApplication.run(EurekaServiceApplication.class, args);
}
}
Here is my application Property file:
spring.application.name=EurekaService
eureka.client.serviceUrl.defaultZone:http://localhost:9091/eureka/
server.port=9091
eureka.client.register-with-eureka=false
eureka.client.fetch-registry=false

Whitelabel Error Page in Spring Boot

I tried to create a spring boot starter project. When I tried to run this I got this error.
Whitelabel Error Page
This application has no explicit mapping for /error, so you are seeing
this as a fallback.
Fri Dec 29 14:16:46 IST 2017 There was an unexpected error (type=Not
Found, status=404). /
I added jsp files to src/web-inf/views/
Added
spring.mvc.view.prefix = /WEB-INF/views/ spring.mvc.view.suffix = .jsp
spring.mvc.static-path-pattern=/resources/**
to application.property file.
Created another controller:
#Controller
public class HomeController {
#RequestMapping(value = "/", method = RequestMethod.GET)
public String index() {
return "index";
}
#PostMapping("/hello")
public String sayHello(#RequestParam("name") String name, Model model) {
model.addAttribute("name", name);
return "hello";
}
}
But still when I tried to run the same error occurs.
After lots of research, I found that I should add WebMvcConfigurerAdapter:
I added new class:
#Configuration
#EnableWebMvc
#ComponentScan
public class ViewConfig extends WebMvcConfigurerAdapter {
#Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
registry.addResourceHandler("/resources/**").addResourceLocations("/resources/");
}
#Override
public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
configurer.enable();
}
#Bean
public InternalResourceViewResolver jspViewResolver() {
InternalResourceViewResolver bean = new InternalResourceViewResolver();
bean.setPrefix("/WEB-INF/views/");
bean.setSuffix(".jsp");
return bean;
}
}
my POM:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.paymark</groupId>
<artifactId>paymark</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<name>paymark</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.9.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<!-- JSTL tag lib -->
<dependency>
<groupId>javax.servlet.jsp.jstl</groupId>
<artifactId>javax.servlet.jsp.jstl-api</artifactId>
<version>1.2.1</version>
</dependency>
<dependency>
<groupId>taglibs</groupId>
<artifactId>standard</artifactId>
<version>1.1.2</version>
</dependency>
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-jasper</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
File Structure:
Still the same error:
what am i doing here wrong? Please help
Log:
2017-12-29 15:40:01.756 INFO 12571 --- [ main] com.paymark.app.PaymarkApplication : Starting PaymarkApplication on Karthiks-MacBook-Air.local with PID 12571 (/Applications/MAMP/htdocs/paymark/target/classes started by karthikcp in /Applications/MAMP/htdocs/paymark)
2017-12-29 15:40:01.759 INFO 12571 --- [ main] com.paymark.app.PaymarkApplication : No active profile set, falling back to default profiles: default
2017-12-29 15:40:01.812 INFO 12571 --- [ main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext#7f77e91b: startup date [Fri Dec 29 15:40:01 IST 2017]; root of context hierarchy
2017-12-29 15:40:03.035 INFO 12571 --- [ main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 8080 (http)
2017-12-29 15:40:03.048 INFO 12571 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2017-12-29 15:40:03.049 INFO 12571 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/8.5.23
2017-12-29 15:40:03.258 WARN 12571 --- [ost-startStop-1] o.a.tomcat.util.scan.StandardJarScanner : Failed to scan [file:/Users/karthikcp/.m2/repository/javax/servlet/jsp/jstl/javax.servlet.jsp.jstl-api/1.2.1/javax.servlet.jsp.jstl-api-1.2.1.jar] from classloader hierarchy
java.util.zip.ZipException: invalid LOC header (bad signature)
at java.util.zip.ZipFile.read(Native Method) ~[na:1.8.0_131]
at java.util.zip.ZipFile.access$1400(ZipFile.java:60) ~[na:1.8.0_131]
at java.util.zip.ZipFile$ZipFileInputStream.read(ZipFile.java:717) ~[na:1.8.0_131]
at java.util.zip.ZipFile$ZipFileInflaterInputStream.fill(ZipFile.java:419) ~[na:1.8.0_131]
at java.util.zip.InflaterInputStream.read(InflaterInputStream.java:158) ~[na:1.8.0_131]
at sun.misc.IOUtils.readFully(IOUtils.java:65) ~[na:1.8.0_131]
at java.util.jar.JarFile.getBytes(JarFile.java:425) ~[na:1.8.0_131]
at java.util.jar.JarFile.getManifestFromReference(JarFile.java:193) ~[na:1.8.0_131]
at java.util.jar.JarFile.getManifest(JarFile.java:180) ~[na:1.8.0_131]
at org.apache.tomcat.util.scan.JarFileUrlJar.getManifest(JarFileUrlJar.java:151) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.tomcat.util.scan.StandardJarScanner.processManifest(StandardJarScanner.java:387) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.tomcat.util.scan.StandardJarScanner.process(StandardJarScanner.java:340) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.tomcat.util.scan.StandardJarScanner.scan(StandardJarScanner.java:288) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.jasper.servlet.TldScanner.scanJars(TldScanner.java:262) [tomcat-embed-jasper-8.5.23.jar:8.5.23]
at org.apache.jasper.servlet.TldScanner.scan(TldScanner.java:104) [tomcat-embed-jasper-8.5.23.jar:8.5.23]
at org.apache.jasper.servlet.JasperInitializer.onStartup(JasperInitializer.java:101) [tomcat-embed-jasper-8.5.23.jar:8.5.23]
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5196) [tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) [tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1419) [tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1409) [tomcat-embed-core-8.5.23.jar:8.5.23]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [na:1.8.0_131]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_131]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_131]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_131]
2017-12-29 15:40:03.262 WARN 12571 --- [ost-startStop-1] o.a.tomcat.util.scan.StandardJarScanner : Failed to scan [file:/Users/karthikcp/.m2/repository/taglibs/standard/1.1.2/standard-1.1.2.jar] from classloader hierarchy
java.util.zip.ZipException: invalid LOC header (bad signature)
at java.util.zip.ZipFile.read(Native Method) ~[na:1.8.0_131]
at java.util.zip.ZipFile.access$1400(ZipFile.java:60) ~[na:1.8.0_131]
at java.util.zip.ZipFile$ZipFileInputStream.read(ZipFile.java:717) ~[na:1.8.0_131]
at java.util.zip.ZipFile$ZipFileInflaterInputStream.fill(ZipFile.java:419) ~[na:1.8.0_131]
at java.util.zip.InflaterInputStream.read(InflaterInputStream.java:158) ~[na:1.8.0_131]
at sun.misc.IOUtils.readFully(IOUtils.java:65) ~[na:1.8.0_131]
at java.util.jar.JarFile.getBytes(JarFile.java:425) ~[na:1.8.0_131]
at java.util.jar.JarFile.getManifestFromReference(JarFile.java:193) ~[na:1.8.0_131]
at java.util.jar.JarFile.getManifest(JarFile.java:180) ~[na:1.8.0_131]
at org.apache.tomcat.util.scan.JarFileUrlJar.getManifest(JarFileUrlJar.java:151) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.tomcat.util.scan.StandardJarScanner.processManifest(StandardJarScanner.java:387) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.tomcat.util.scan.StandardJarScanner.process(StandardJarScanner.java:340) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.tomcat.util.scan.StandardJarScanner.scan(StandardJarScanner.java:288) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.jasper.servlet.TldScanner.scanJars(TldScanner.java:262) [tomcat-embed-jasper-8.5.23.jar:8.5.23]
at org.apache.jasper.servlet.TldScanner.scan(TldScanner.java:104) [tomcat-embed-jasper-8.5.23.jar:8.5.23]
at org.apache.jasper.servlet.JasperInitializer.onStartup(JasperInitializer.java:101) [tomcat-embed-jasper-8.5.23.jar:8.5.23]
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5196) [tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) [tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1419) [tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1409) [tomcat-embed-core-8.5.23.jar:8.5.23]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [na:1.8.0_131]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_131]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_131]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_131]
2017-12-29 15:40:03.267 INFO 12571 --- [ost-startStop-1] org.apache.jasper.servlet.TldScanner : At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.
2017-12-29 15:40:03.269 INFO 12571 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2017-12-29 15:40:03.270 INFO 12571 --- [ost-startStop-1] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 1461 ms
2017-12-29 15:40:03.382 INFO 12571 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean : Mapping servlet: 'dispatcherServlet' to [/]
2017-12-29 15:40:03.385 INFO 12571 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'characterEncodingFilter' to: [/*]
2017-12-29 15:40:03.937 INFO 12571 --- [ main] j.LocalContainerEntityManagerFactoryBean : Building JPA container EntityManagerFactory for persistence unit 'default'
2017-12-29 15:40:03.948 INFO 12571 --- [ main] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [
name: default
...]
2017-12-29 15:40:04.015 INFO 12571 --- [ main] org.hibernate.Version : HHH000412: Hibernate Core {5.0.12.Final}
2017-12-29 15:40:04.016 INFO 12571 --- [ main] org.hibernate.cfg.Environment : HHH000206: hibernate.properties not found
2017-12-29 15:40:04.017 INFO 12571 --- [ main] org.hibernate.cfg.Environment : HHH000021: Bytecode provider name : javassist
2017-12-29 15:40:04.046 INFO 12571 --- [ main] o.hibernate.annotations.common.Version : HCANN000001: Hibernate Commons Annotations {5.0.1.Final}
2017-12-29 15:40:04.134 INFO 12571 --- [ main] org.hibernate.dialect.Dialect : HHH000400: Using dialect: org.hibernate.dialect.MySQL5Dialect
2017-12-29 15:40:04.288 INFO 12571 --- [ main] org.hibernate.tool.hbm2ddl.SchemaExport : HHH000227: Running hbm2ddl schema export
2017-12-29 15:40:04.292 INFO 12571 --- [ main] org.hibernate.tool.hbm2ddl.SchemaExport : HHH000230: Schema export complete
2017-12-29 15:40:04.307 INFO 12571 --- [ main] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
2017-12-29 15:40:04.408 INFO 12571 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error]}" onto public org.springframework.http.ResponseEntity<java.util.Map<java.lang.String, java.lang.Object>> org.springframework.boot.autoconfigure.web.BasicErrorController.error(javax.servlet.http.HttpServletRequest)
2017-12-29 15:40:04.409 INFO 12571 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error],produces=[text/html]}" onto public org.springframework.web.servlet.ModelAndView org.springframework.boot.autoconfigure.web.BasicErrorController.errorHtml(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse)
2017-12-29 15:40:04.440 INFO 12571 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/resources/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2017-12-29 15:40:04.444 INFO 12571 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.DefaultServletHttpRequestHandler]
2017-12-29 15:40:04.487 INFO 12571 --- [ main] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for #ControllerAdvice: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext#7f77e91b: startup date [Fri Dec 29 15:40:01 IST 2017]; root of context hierarchy
2017-12-29 15:40:05.046 INFO 12571 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup
2017-12-29 15:40:05.107 INFO 12571 --- [ main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 8080 (http)
2017-12-29 15:40:05.111 INFO 12571 --- [ main] com.paymark.app.PaymarkApplication : Started PaymarkApplication in 3.584 seconds (JVM running for 4.494)

Finally, i found a solution:
I added the HomeController to the main package. Now I am able to map the JSP.
But don't know why!

try with #RequestBody Annotation :
#PostMapping("/hello")
public String sayHello(){
#RequestBody("name) String name, Model model
try with #RequestBody Annotation
}