Develop Reference

Connection refused between Azure monitor and Application-insights java agent

Attempting to add Application-insights to a java application running in AKS.
Followed the steps provided here: https://learn.microsoft.com/en-us/azure/azure-monitor/app/java-in-process-agent
an ai-agent.jar is placed in the root of the image.
The connection string is provided via environment variables.
the image is initialized with the following commands:
command: ["java"]
args: ["-javaagent:/agent.jar", "-jar", "/app.jar"]
both the spring-boot app and the agent do start, but the logs for the agent are followed up by these errors:
2021-08-19 15:43:26.914Z WARN c.m.a.a.i.q.QuickPulsePingSender - Live metrics endpoint ping failed io.netty.channel.AbstractChannel$AnnotatedConnectException: finishConnect(..) failed: Connection refused: rt.services.visualstudio.com/157.55.177.6:443 (future failures will be aggregated and logged once every 5 minutes)
reactor.core.Exceptions$ReactiveException: io.netty.channel.AbstractChannel$AnnotatedConnectException: finishConnect(..) failed: Connection refused: rt.services.visualstudio.com/157.55.177.6:443
at reactor.core.Exceptions.propagate(Exceptions.java:392)
at reactor.core.publisher.BlockingSingleSubscriber.blockingGet(BlockingSingleSubscriber.java:97)
at reactor.core.publisher.Mono.block(Mono.java:1703)
at com.microsoft.applicationinsights.agent.internal.quickpulse.QuickPulsePingSender.ping(QuickPulsePingSender.java:95)
at com.microsoft.applicationinsights.agent.internal.quickpulse.QuickPulseCoordinator.ping(QuickPulseCoordinator.java:106)
at com.microsoft.applicationinsights.agent.internal.quickpulse.QuickPulseCoordinator.run(QuickPulseCoordinator.java:63)
at java.base/java.lang.Thread.run(Thread.java:829)
Suppressed: java.lang.Exception: #block terminated with an error
at reactor.core.publisher.BlockingSingleSubscriber.blockingGet(BlockingSingleSubscriber.java:99)
... 5 common frames omitted
Caused by: io.netty.channel.AbstractChannel$AnnotatedConnectException: finishConnect(..) failed: Connection refused: rt.services.visualstudio.com/157.55.177.6:443
Caused by: java.net.ConnectException: finishConnect(..) failed: Connection refused
at io.netty.channel.unix.Errors.newConnectException0(Errors.java:155)
at io.netty.channel.unix.Errors.handleConnectErrno(Errors.java:128)
at io.netty.channel.unix.Socket.finishConnect(Socket.java:278)
at io.netty.channel.epoll.AbstractEpollChannel$AbstractEpollUnsafe.doFinishConnect(AbstractEpollChannel.java:710)
at io.netty.channel.epoll.AbstractEpollChannel$AbstractEpollUnsafe.finishConnect(AbstractEpollChannel.java:687)
at io.netty.channel.epoll.AbstractEpollChannel$AbstractEpollUnsafe.epollOutReady(AbstractEpollChannel.java:567)
at io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:470)
at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:378)
at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989)
at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
at java.base/java.lang.Thread.run(Thread.java:829)
2021-08-19 15:43:27.888Z INFO c.m.applicationinsights.agent - ApplicationInsights Java Agent 3.2.0-BETA.2 started successfully (PID 1)
2021-08-19 15:43:27.893Z WARN c.m.a.a.i.i.AppIdSupplier$GetAppIdTask - unable to retrieve appId exception sending request to https://westeurope-3.in.applicationinsights.azure.com/api/profiles/<INSTRUMENTATION_KEY>/appId (future failures will be aggregated and logged once every 5 minutes)
reactor.core.Exceptions$ReactiveException: io.netty.channel.AbstractChannel$AnnotatedConnectException: finishConnect(..) failed: Connection refused: westeurope-3.in.applicationinsights.azure.com/13.69.65.23:443
at reactor.core.Exceptions.propagate(Exceptions.java:392)
at reactor.core.publisher.BlockingSingleSubscriber.blockingGet(BlockingSingleSubscriber.java:97)
at reactor.core.publisher.Mono.block(Mono.java:1703)
at com.microsoft.applicationinsights.agent.internal.init.AppIdSupplier$GetAppIdTask.run(AppIdSupplier.java:123)
at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:304)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java.base/java.lang.Thread.run(Thread.java:829)
Suppressed: java.lang.Exception: #block terminated with an error
at reactor.core.publisher.BlockingSingleSubscriber.blockingGet(BlockingSingleSubscriber.java:99)
... 8 common frames omitted
Caused by: io.netty.channel.AbstractChannel$AnnotatedConnectException: finishConnect(..) failed: Connection refused: westeurope-3.in.applicationinsights.azure.com/13.69.65.23:443
Caused by: java.net.ConnectException: finishConnect(..) failed: Connection refused
at io.netty.channel.unix.Errors.newConnectException0(Errors.java:155)
at io.netty.channel.unix.Errors.handleConnectErrno(Errors.java:128)
at io.netty.channel.unix.Socket.finishConnect(Socket.java:278)
at io.netty.channel.epoll.AbstractEpollChannel$AbstractEpollUnsafe.doFinishConnect(AbstractEpollChannel.java:710)
at io.netty.channel.epoll.AbstractEpollChannel$AbstractEpollUnsafe.finishConnect(AbstractEpollChannel.java:687)
at io.netty.channel.epoll.AbstractEpollChannel$AbstractEpollUnsafe.epollOutReady(AbstractEpollChannel.java:567)
at io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:470)
at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:378)
at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989)
at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
at java.base/java.lang.Thread.run(Thread.java:829)
as far as I can tell, the issue seems to stem from the agent not being able to retrieve the appId, but sshing into the container and performing a curl
curl https://westeurope-3.in.applicationinsights.azure.com/api/profiles/<INSTRUMENTATION_KEY>/appId
does return a result, leading me to believe that the pod does have a connection to the Azure monitor instance.
I've tried multiple versions of the agent jar, tried the SDK and custom events inside the spring-boot app, manually starting a secondary java instance, provided the connection string/instrumentation-key using kubectl, local env variable, applicationinsights.json file, and as a JVM parameter, all this to no avail.
right now it feels like I'm all out of ideas and unable to get any further with this issue without some external input.
Does anyone recognize this issue, or tackled something similar before?

I've faced similar situation and it seems that in my case, the Java app was running inside a VM without outbound access to the internet. This way,it wasn't reaching Azure Monitor/App Insight DNS and not sending the data to the ingestion service.
Have you tried running a CURL within your app infrastructure and making sure it can outbound http traffic?

How to access MySQL database on docker from Spring application on Docker?

I have a Spring Boot + MySQL application which cannot start in docker environment (manually it runs with no errors, but I have to change the application.properties)
So first I launch the MySQL in docker with these command:
docker run -p 3307:3306 --name mysqldb -e MYSQL_ROOT_PASSWORD=root -e MYSQL_DATABASE=exp mysql
And here it is the docker containers list:
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
0cc5c690fb7e mysql "docker-entrypoint.s…" 30 seconds ago Up 30 seconds 33060/tcp, 0.0.0.0:3307->3306/tcp, :::3307->3306/tcp mysqldb
This is screenshot of server connection settings for the database
When the database is running, I launch the Spring app with following commands in terminal:
docker run -p 9090:8080 --name exp --net spring-net -e MYSQL_HOST=mysqldb -e MYSQL_USER=root -e MYSQL_PASSWORD=root -e MYSQL_PORT=3306 exp
As you can see, I used the docker network which is connected to mysqldb with following command docker network connect spring-net mysqldb
Here are the application.properies settings:
spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQL5Dialect
spring.jpa.hibernate.naming-strategy=org.hibernate.cfg.ImprovedNamingStrategy
spring.jpa.properties.hibernate.ddl-auto=update
spring.jpa.properties.hibernate.show-sql=true
spring.datasource.url=jdbc:mysql://mysqldb:3307/exp?verifyServerCertificate=true&useSSL=false&serverTimezone=UTC&useLegacyDatetimeCode=false
spring.datasource.driverClassName=com.mysql.cj.jdbc.Driver
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.initialization-mode=always
spring.datasource.validationQuery=SELECT 1
spring.datasource.testWhileIdle=true
spring.server.port=8080
spring.server.compression.enabled=true
spring.jpa.database-platform=org.hibernate.dialect.H2Dialect
spring.jpa.hibernate.ddl-auto=update
spring.jpa.properties.hibernate.format_sql=true
When I try to start this, the application cannot find the mysqldb, here is the error from console:
Caused by: java.net.UnknownHostException: mysqldb
at java.net.InetAddress.getAllByName0(InetAddress.java:1281) ~[na:1.8.0_191]
at java.net.InetAddress.getAllByName(InetAddress.java:1193) ~[na:1.8.0_191]
at java.net.InetAddress.getAllByName(InetAddress.java:1127) ~[na:1.8.0_191]
at com.mysql.cj.protocol.StandardSocketFactory.connect(StandardSocketFactory.java:132) ~[mysql-connector-java-8.0.22.jar!/:8.0.22]
at com.mysql.cj.protocol.a.NativeSocketConnection.connect(NativeSocketConnection.java:63) ~[mysql-connector-java-8.0.22.jar!/:8.0.22]
... 170 common frames omitted
However, when I change the spring.datasource.url inside application.properties to this:
spring.datasource.url=jdbc:mysql://localhost:3307/exp?verifyServerCertificate=true&useSSL=false&serverTimezone=UTC&useLegacyDatetimeCode=false
and build it it runs following exception:
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-8.0.22.jar!/:8.0.22]
And
Caused by: java.net.ConnectException: Connection refused (Connection refused)
at java.net.PlainSocketImpl.socketConnect(Native Method) ~[na:1.8.0_191]
And
Caused by: javax.persistence.PersistenceException: [PersistenceUnit: default] Unable to build Hibernate SessionFactory; nested exception is org.hibernate.exception.JDBCConnectionException: Unable to open JDBC Connection for DDL execution
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:403) ~[spring-orm-5.2.10.RELEASE.jar!/:5.2.10.RELEASE]
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:378) ~[spring-orm-5.2.10.RELEASE.jar!/:5.2.10.RELEASE]
at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.afterPropertiesSet(LocalContainerEntityManagerFactoryBean.java:341) ~[spring-orm-5.2.10.RELEASE.jar!/:5.2.10.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1853) ~[spring-beans-5.2.10.RELEASE.jar!/:5.2.10.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1790) ~[spring-beans-5.2.10.RELEASE.jar!/:5.2.10.RELEASE]
... 135 common frames omitted
Caused by: org.hibernate.exception.JDBCConnectionException: Unable to open JDBC Connection for DDL execution

I think it is too late to connect the mysql container to the same network as your spring container, so I would suggest you first create the network and use that in both of your containers.
$ docker network create my-network
Then you have to use the mysqldb container name and the inside port in your application.properties (because you are trying to connect from a container) like this:
spring.datasource.url=jdbc:mysql://mysqldb:3306/exp?verifyServerCertificate=true&useSSL=false&serverTimezone=UTC&useLegacyDatetimeCode=false

Connection refused when connecting to host mysql db from docker container

I am trying to connect to mysql server running on host machine (localhost) from a spring app running inside a docker container
this is my Dockerfile
FROM openjdk:11
ADD build/libs/demo-0.0.1-SNAPSHOT.jar demo.jar
EXPOSE 8000
RUN mkdir -p tmp/scripts
RUN mkdir -p tmp/logs
ENTRYPOINT ["java","-jar","/demo.jar"]
I am using Docker desktop for mac v2.3.0.3 with engine version 19.03.8
This is may hikariCP datasource connection properties
spring.datasource.jdbcUrl=jdbc:mysql://**host.docker.internal:3306**/freshid
spring.datasource.username=sa
spring.datasource.password=test
When I build docker build -f Dockerfile -t demo . and run the image as docker run -p 8000:8000 demo
I get the following error on application start up
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)
at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:64)
at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:835)
at com.mysql.cj.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:455)
at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:240)
at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:199)
at com.zaxxer.hikari.util.DriverDataSource.getConnection(DriverDataSource.java:138)
at com.zaxxer.hikari.pool.PoolBase.newConnection(PoolBase.java:354)
at com.zaxxer.hikari.pool.PoolBase.newPoolEntry(PoolBase.java:202)
at com.zaxxer.hikari.pool.HikariPool.createPoolEntry(HikariPool.java:473)
at com.zaxxer.hikari.pool.HikariPool.checkFailFast(HikariPool.java:554)
... 64 common frames omitted
Caused by: com.mysql.cj.exceptions.CJCommunicationsException: 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 java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490)
at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:61)
at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:105)
at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:151)
at com.mysql.cj.exceptions.ExceptionFactory.createCommunicationsException(ExceptionFactory.java:167)
at com.mysql.cj.protocol.a.NativeSocketConnection.connect(NativeSocketConnection.java:91)
at com.mysql.cj.NativeSession.connect(NativeSession.java:152)
at com.mysql.cj.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:955)
at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:825)
... 72 common frames omitted
Caused by: java.net.ConnectException: Connection refused (Connection refused)
at java.base/java.net.PlainSocketImpl.socketConnect(Native Method)
at java.base/java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:399)
at java.base/java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:242)
at java.base/java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:224)
at java.base/java.net.SocksSocketImpl.connect(SocksSocketImpl.java:403)
at java.base/java.net.Socket.connect(Socket.java:609)
at com.mysql.cj.protocol.StandardSocketFactory.connect(StandardSocketFactory.java:155)
at com.mysql.cj.protocol.a.NativeSocketConnection.connect(NativeSocketConnection.java:65)
... 75 common frames omitted

I uninstalled and re-installed the docker (19.03.8) and it worked. The final connection string is jdbc:mysql://host.docker.internal:3306/db. This does not conclude any technical correctness but it worked. Thanks.

I would suggest a simple solution.
Step 1: Turboshooting: Try to run springboot appliction in you machine, outside container. If works fine, then there is no issue your application. (Make sure while testing locally you change your DB connection string from host.docker.internal to localhost)
Step 2: Please expose your DB port, that is 3306 by default in case of mysql when you run Docker Container with imperitive command
docker run -p 8000:8000 -p 3306:3306 demo
This should resolve your issue 😎😎

Titan - Cassandra - Elasticsearch :: Connection refused

I am running Titan 0.5.0 with Cassandra 2.0.8.
When I first ran my Java client with a local Titan-Cassandra I could connect to it. Now that I deployed the Titan-Cassandra remotely on a Debian Wheezy with dedicated user I have a "Connection refused exception" (see stack below). I can connect to Titan via Rexter on the remote server via http://my-domain.com:8182 and I can see my vertices and edges.
What is the changes to do on a local configuration (Java client and Titan on same machine) to make Titan with Cassandra and Elasticsearch run on a remote machine accessed by my Java client?
Java client code
private final URL titanConfiguration =TitanRepository.class.getResource("/conf/titan-cassandra.properties");
public TitanGraph load() {
return TitanFactory.open(titanConfiguration.getPath());
}
Working configuration with local Titan-Cassandra:
Java configuration titan-cassandra.properties
storage.backend=cassandrathrift
storage.hostname=127.0.0.1
cache.db-cache = true
cache.db-cache-clean-wait = 20
cache.db-cache-time = 180000
cache.db-cache-size = 0.5
index.search.backend=elasticsearch
index.search.hostname=127.0.0.1
index.search.client-only=true
schema.default=none
No change in the Titan conf directory
NOT working java configuration with Titan-Cassandra on remote server
Java configuration titan-cassandra.properties
storage.backend=cassandrathrift
storage.hostname=192.168.1.20 <<< OR http://my-domain.com
cache.db-cache = true
cache.db-cache-clean-wait = 20
cache.db-cache-time = 180000
cache.db-cache-size = 0.5
index.search.backend=elasticsearch
index.search.hostname=192.168.1.20 <<< OR http://my-domain.com
index.search.client-only=true
schema.default=none
changes in Titan conf directory
rexster-cassandra-es.xml:
<base-uri>http://my-domain.com</base-uri>
<index.search.hostname>192.168.1.20</index.search.hostname>
Stacktrace
java.lang.IllegalArgumentException: Could not instantiate implementation: com.thinkaurelius.titan.diskstorage.cassandra.thrift.CassandraThriftStoreManager
at com.thinkaurelius.titan.util.system.ConfigurationUtil.instantiate(ConfigurationUtil.java:55)
at com.thinkaurelius.titan.diskstorage.Backend.getImplementationClass(Backend.java:425)
at com.thinkaurelius.titan.diskstorage.Backend.getStorageManager(Backend.java:366)
at com.thinkaurelius.titan.graphdb.configuration.GraphDatabaseConfiguration.<init>(GraphDatabaseConfiguration.java:1208)
at com.thinkaurelius.titan.core.TitanFactory.open(TitanFactory.java:92)
at com.thinkaurelius.titan.core.TitanFactory.open(TitanFactory.java:60)
at be.jiliant.spotmydate.server.TitanRepository.load(TitanRepository.java:30)
at be.jiliant.spotmydate.server.persist.processor.PersistProcessor.process(PersistProcessor.java:38)
at org.apache.camel.processor.DelegateSyncProcessor.process(DelegateSyncProcessor.java:63)
at org.apache.camel.management.InstrumentationProcessor.process(InstrumentationProcessor.java:72)
at org.apache.camel.processor.interceptor.TraceInterceptor.process(TraceInterceptor.java:163)
at org.apache.camel.processor.RedeliveryErrorHandler.process(RedeliveryErrorHandler.java:398)
at org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:191)
at org.apache.camel.processor.Pipeline.process(Pipeline.java:118)
at org.apache.camel.processor.Pipeline.process(Pipeline.java:80)
at org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:191)
at org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:105)
at org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:87)
at org.apache.camel.component.jms.EndpointMessageListener.onMessage(EndpointMessageListener.java:103)
at org.springframework.jms.listener.AbstractMessageListenerContainer.doInvokeListener(AbstractMessageListenerContainer.java:685)
at org.springframework.jms.listener.AbstractMessageListenerContainer.invokeListener(AbstractMessageListenerContainer.java:623)
at org.springframework.jms.listener.AbstractMessageListenerContainer.doExecuteListener(AbstractMessageListenerContainer.java:591)
at org.springframework.jms.listener.AbstractPollingMessageListenerContainer.doReceiveAndExecute(AbstractPollingMessageListenerContainer.java:308)
at org.springframework.jms.listener.AbstractPollingMessageListenerContainer.receiveAndExecute(AbstractPollingMessageListenerContainer.java:246)
at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.invokeListener(DefaultMessageListenerContainer.java:1142)
at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.executeOngoingLoop(DefaultMessageListenerContainer.java:1134)
at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.run(DefaultMessageListenerContainer.java:1031)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.reflect.InvocationTargetException: null
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
at com.thinkaurelius.titan.util.system.ConfigurationUtil.instantiate(ConfigurationUtil.java:44)
... 29 common frames omitted
Caused by: com.thinkaurelius.titan.diskstorage.TemporaryBackendException: Temporary failure in storage backend
at com.thinkaurelius.titan.diskstorage.cassandra.thrift.CassandraThriftStoreManager.getCassandraPartitioner(CassandraThriftStoreManager.java:218)
at com.thinkaurelius.titan.diskstorage.cassandra.thrift.CassandraThriftStoreManager.<init>(CassandraThriftStoreManager.java:196)
... 34 common frames omitted
Caused by: org.apache.thrift.transport.TTransportException: java.net.ConnectException: Connection refused
at org.apache.thrift.transport.TSocket.open(TSocket.java:185)
at org.apache.thrift.transport.TFramedTransport.open(TFramedTransport.java:81)
at com.thinkaurelius.titan.diskstorage.cassandra.thrift.thriftpool.CTConnectionFactory.makeRawConnection(CTConnectionFactory.java:87)
at com.thinkaurelius.titan.diskstorage.cassandra.thrift.thriftpool.CTConnectionFactory.makeObject(CTConnectionFactory.java:52)
at com.thinkaurelius.titan.diskstorage.cassandra.thrift.thriftpool.CTConnectionFactory.makeObject(CTConnectionFactory.java:21)
at org.apache.commons.pool.impl.GenericKeyedObjectPool.borrowObject(GenericKeyedObjectPool.java:1220)
at com.thinkaurelius.titan.diskstorage.cassandra.thrift.CassandraThriftStoreManager.getCassandraPartitioner(CassandraThriftStoreManager.java:215)
... 35 common frames omitted
Caused by: java.net.ConnectException: Connection refused
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:579)
at org.apache.thrift.transport.TSocket.open(TSocket.java:180)
... 41 common frames omitted

If Rexster runs on the same (remote) box and can connect, but you can't connect from your local machine, then it's most likely a Cassandra configuration issue. In cassandra.yaml set rpc_address to 0.0.0.0 (currently you've probably set it to 127.0.0.1), restart Cassandra and try to connect again.

Why am I getting the error "connection refused" with JMX

I am unable to connect to JMX object. Here is how I create a JMX object:
public static void main(String... args) {
MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
try {
ObjectName name = new ObjectName("org.javasimon.jmx.example:type=Simon");
if (mbs.isRegistered(name)) {
mbs.unregisterMBean(name);
}
SimonManagerMXBean simonManagerMXBean = new SimonManagerMXBeanImpl(SimonManager.manager());
mbs.registerMBean(simonManagerMXBean, name);
System.out.println("SimonManagerMXBean registerd under name: "+name);
} catch (JMException e) {
System.out.println("SimonManagerMXBean registration failed!\n"+e);
}
while (true) {
// waiting for connections
}
}
This is a code for connecting to the remote JMX object:
JMXServiceURL url = new JMXServiceURL("service:jmx:rmi://127.0.0.1:9999/jndi/rmi://127.0.0.1:1099/jmxrmi");
JMXConnector jmxc = JMXConnectorFactory.connect(url, null);
MBeanServerConnection mbsc = jmxc.getMBeanServerConnection();
SimonManagerMXBean simonManagerMXBean = JMX.newMXBeanProxy(mbsc, new ObjectName("org.javasimon.jmx.example:type=Simon"), SimonManagerMXBean.class);
return simonManagerMXBean;
Unfortunatelly I receive the following error:
java.io.IOException: Failed to retrieve RMIServer stub: javax.naming.ServiceUnavailableException [Root exception is java.rmi.ConnectException: Connection refused to host: 127.0.0.1; nested exception is:
java.net.ConnectException: Connection refused: connect]
at javax.management.remote.rmi.RMIConnector.connect(RMIConnector.java:338)
at javax.management.remote.JMXConnectorFactory.connect(JMXConnectorFactory.java:248)
at my.code.RemoteSimonManagerFactoryImpl.createSimonManager(RemoteSimonManagerFactoryImpl.java:24)
at my.code.Demo.main(DemoAggregation.java:21)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)
Caused by: javax.naming.ServiceUnavailableException [Root exception is java.rmi.ConnectException: Connection refused to host: 127.0.0.1; nested exception is:
java.net.ConnectException: Connection refused: connect]
at com.sun.jndi.rmi.registry.RegistryContext.lookup(RegistryContext.java:101)
at com.sun.jndi.toolkit.url.GenericURLContext.lookup(GenericURLContext.java:185)
at javax.naming.InitialContext.lookup(InitialContext.java:392)
at javax.management.remote.rmi.RMIConnector.findRMIServerJNDI(RMIConnector.java:1886)
at javax.management.remote.rmi.RMIConnector.findRMIServer(RMIConnector.java:1856)
at javax.management.remote.rmi.RMIConnector.connect(RMIConnector.java:255)
... 9 more
Caused by: java.rmi.ConnectException: Connection refused to host: 127.0.0.1; nested exception is:
java.net.ConnectException: Connection refused: connect
at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:601)
at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:198)
at sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:184)
at sun.rmi.server.UnicastRef.newCall(UnicastRef.java:322)
at sun.rmi.registry.RegistryImpl_Stub.lookup(Unknown Source)
at com.sun.jndi.rmi.registry.RegistryContext.lookup(RegistryContext.java:97)
... 14 more
Caused by: java.net.ConnectException: Connection refused: connect
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:351)
at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:213)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:200)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
at java.net.Socket.connect(Socket.java:529)
at java.net.Socket.connect(Socket.java:478)
at java.net.Socket.<init>(Socket.java:375)
at java.net.Socket.<init>(Socket.java:189)
at sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(RMIDirectSocketFactory.java:22)
at sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(RMIMasterSocketFactory.java:128)
at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:595)
... 19 more
If I try to connect to my JMX server (as to local process) using "jconsole" utility, I first get "ConnectionFailedSSL1" error, but when I click "Insecure" button in the error form, I connect successfully.
Both server and client are on the same computer.
I am using Windows 7 x64. Windows firewall is disabled.

Caused by: java.rmi.ConnectException: Connection refused to host: 127.0.0.1; nested exception is:
Most likely you are not running your server with the right JVM parameters. Jconsole uses a different mechanism to find and to connect to local processes. Your client code is trying to use TCP/IP to connect to your server. To turn this on you'll need to add something like the following to your Java command line on your server:
-Dcom.sun.management.jmxremote
-Dcom.sun.management.jmxremote.port=1099
See: How to activate JMX on my JVM for access with jconsole?
As an aside, you might want to consider using my SimpleJMX library which does all this code for you. It includes a JMX client code as well.

I've manage run Tomcat with JMX (Tomcat 8, Windows) by:
add
-Dcom.sun.management.jmxremote
-Dcom.sun.management.jmxremote.port=1099
-Dcom.sun.management.jmxremote.ssl=false
-Dcom.sun.management.jmxremote.authenticate=false
run with admin permissions

I received the same error. In my case I was using a #PostConstruct annotation and that method was attempting to use the RMI connection before Spring had a chance to configure the connection.
It didn't end up being anything wrong with the configuration of the connection, just that I accidentally tried to use it before it was ready. Hope this might help someone.

check your tomcat's bin folder for catalina.sh file. open it up and find java server parameters. add thoose followings to $JAVA_OPTS on any line you want.
-Dcom.sun.management.jmxremote
-Dcom.sun.management.jmxremote.port=1099
you are done!