Develop Reference

Issue while running Jitsi videobridge

I tried to clone jvb and run with maven accordint to this. And i did it using docker. My dockerfile is
FROM ubuntu:18.04
RUN apt-get update -y
RUN apt-get install default-jdk -y
RUN apt-get install -y maven
CMD ["sleep","1000000"]
My docker-compose file is
version: '3.3'
services:
jvbz:
build: .
volumes:
- "./src:/jvb:rw"
- "./.m2:/root/.m2:rw"
working_dir: /jvb
ports:
- "8086:1999"
but when i run using maven it shows the following error:
[INFO] Scanning for projects...
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Build Order:
[INFO]
[INFO] jvb-parent
[INFO] jvb-api-parent
[INFO] jvb-api-common
[INFO] jvb-api-client
[INFO] jitsi-videobridge
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building jvb-parent 2.1-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-enforcer-plugin:3.0.0-M3:enforce (enforce-maven) # jvb-parent ---
[INFO]
[INFO] --- exec-maven-plugin:3.0.0:exec (default-cli) # jvb-parent ---
Error: Could not find or load main class org.jitsi.videobridge.MainKt
Caused by: java.lang.ClassNotFoundException: org.jitsi.videobridge.MainKt
[ERROR] Command execution failed.
org.apache.commons.exec.ExecuteException: Process exited with an error: 1 (Exit value: 1)
at org.apache.commons.exec.DefaultExecutor.executeInternal(DefaultExecutor.java:404)
at org.apache.commons.exec.DefaultExecutor.execute(DefaultExecutor.java:166)
at org.codehaus.mojo.exec.ExecMojo.executeCommandLine(ExecMojo.java:982)
at org.codehaus.mojo.exec.ExecMojo.executeCommandLine(ExecMojo.java:929)
at org.codehaus.mojo.exec.ExecMojo.execute(ExecMojo.java:457)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:134)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:208)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:154)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:146)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:117)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:81)
at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:309)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:194)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:107)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:993)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:345)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:191)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary:
[INFO]
[INFO] jvb-parent ......................................... FAILURE [ 0.702 s]
[INFO] jvb-api-parent ..................................... SKIPPED
[INFO] jvb-api-common ..................................... SKIPPED
[INFO] jvb-api-client ..................................... SKIPPED
[INFO] jitsi-videobridge .................................. SKIPPED
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 1.118 s
[INFO] Finished at: 2021-03-31T14:55:55Z
[INFO] Final Memory: 11M/47M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.codehaus.mojo:exec-maven-plugin:3.0.0:exec (default-cli) on project jvb-parent: Command execution failed.: Process exited with an error: 1 (Exit value: 1) -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException
You can view the source code here
Jitsi Videobridge is an XMPP server component that allows for multiuser video communication. Unlike the expensive dedicated hardware videobridges, Jitsi Videobridge does not mix the video channels into a composite video stream, but only relays the received video channels to all call participants. Therefore, while it does need to run on a server with good network bandwidth, CPU horsepower is not that critical for performance.
Can someone please help me with this.

JVM crashing when trying to run the tests by running `mvn test`

Note: I am now aware of The forked VM terminated without saying properly goodbye. VM crash or System.exit called, I tried many of the solutions expressed there and none of them work or make any difference. I documented in this question what I tried and what happened. I don't believe this is a duplicate of that question, essentially, because no answer is accepted so we can't know what the cause behind the error really was and many different problems could cause this same error (not all crashes are the same).
I'm sort of reviving a project that was left in a broken state when I try to run the tests I get this error:
[ERROR] The forked VM terminated without properly saying goodbye. VM crash or System.exit called?
I can't go back to a known working state, because, well, I don't know when that happened and under what conditions.
This is the full output from the command:
> mvn test
[INFO] Scanning for projects...
[INFO]
[INFO] --------------------< com.example:projectxserver >--------------------
[INFO] Building projectxserver 1.0.0-SNAPSHOT
[INFO] --------------------------------[ jar ]---------------------------------
[WARNING] The artifact org.hibernate:hibernate-validator:jar:6.0.17.Final has been relocated to org.hibernate.validator:hibernate-validator:jar:6.0.17.Final
[INFO]
[INFO] --- maven-resources-plugin:3.1.0:resources (default-resources) # projectxserver ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 1 resource
[INFO] Copying 15 resources
[INFO]
[INFO] --- maven-compiler-plugin:3.8.1:compile (default-compile) # projectxserver ---
[WARNING] ***********************************************************************************************************************************************************************
[WARNING] * Required filename-based automodules detected: [javax.servlet-api-4.0.1.jar, javax.inject-1.jar]. Please don't publish this project to a public artifact repository! *
[WARNING] ***********************************************************************************************************************************************************************
[INFO] Nothing to compile - all classes are up to date
[INFO]
[INFO] --- maven-resources-plugin:3.1.0:testResources (default-testResources) # projectxserver ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 1 resource
[INFO]
[INFO] --- maven-compiler-plugin:3.8.1:testCompile (default-testCompile) # projectxserver ---
[INFO] Nothing to compile - all classes are up to date
[INFO]
[INFO] --- maven-surefire-plugin:2.22.2:test (default-test) # projectxserver ---
[INFO]
[INFO] -------------------------------------------------------
[INFO] T E S T S
[INFO] -------------------------------------------------------
[WARNING] Corrupted STDOUT by directly writing to native stream in forked JVM 1. See FAQ web page and the dump file C:\Users\pupeno\Documents\projectx\code\projectxserver\target\surefire-reports\2019-09-26T05-51-30_012-jvmRun1.dumpstream
[INFO]
[INFO] Results:
[INFO]
[INFO] Tests run: 0, Failures: 0, Errors: 0, Skipped: 0
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 7.748 s
[INFO] Finished at: 2019-09-26T05:51:32+01:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-surefire-plugin:2.22.2:test (default-test) on project projectxserver: There are test failures.
[ERROR]
[ERROR] Please refer to C:\Users\pupeno\Documents\projectx\code\projectxserver\target\surefire-reports for the individual test results.
[ERROR] Please refer to dump files (if any exist) [date].dump, [date]-jvmRun[N].dump and [date].dumpstream.
[ERROR] The forked VM terminated without properly saying goodbye. VM crash or System.exit called?
[ERROR] Command was cmd.exe /X /C "C:\Users\pupeno\scoop\apps\oraclejdk\current\bin\java #C:\Users\pupeno\AppData\Local\Temp\surefire12697495595942050464\surefireargs12476787747337053319 C:\Users\pupeno\AppData\Local\Temp\surefire12697495595942050464 2019-09-26T05-51-30_012-jvmRun1 surefire10872047683044717734tmp surefire_013239801033816370074tmp"
[ERROR] Error occurred in starting fork, check output in log
[ERROR] Process Exit Code: 1
[ERROR] org.apache.maven.surefire.booter.SurefireBooterForkException: The forked VM terminated without properly saying goodbye. VM crash or System.exit called?
[ERROR] Command was cmd.exe /X /C "C:\Users\pupeno\scoop\apps\oraclejdk\current\bin\java #C:\Users\pupeno\AppData\Local\Temp\surefire12697495595942050464\surefireargs12476787747337053319 C:\Users\pupeno\AppData\Local\Temp\surefire12697495595942050464 2019-09-26T05-51-30_012-jvmRun1 surefire10872047683044717734tmp surefire_013239801033816370074tmp"
[ERROR] Error occurred in starting fork, check output in log
[ERROR] Process Exit Code: 1
[ERROR] at org.apache.maven.plugin.surefire.booterclient.ForkStarter.fork(ForkStarter.java:669)
[ERROR] at org.apache.maven.plugin.surefire.booterclient.ForkStarter.run(ForkStarter.java:282)
[ERROR] at org.apache.maven.plugin.surefire.booterclient.ForkStarter.run(ForkStarter.java:245)
[ERROR] at org.apache.maven.plugin.surefire.AbstractSurefireMojo.executeProvider(AbstractSurefireMojo.java:1183)
[ERROR] at org.apache.maven.plugin.surefire.AbstractSurefireMojo.executeAfterPreconditionsChecked(AbstractSurefireMojo.java:1011)
[ERROR] at org.apache.maven.plugin.surefire.AbstractSurefireMojo.execute(AbstractSurefireMojo.java:857)
[ERROR] at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:137)
[ERROR] at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:210)
[ERROR] at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:156)
[ERROR] at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:148)
[ERROR] at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:117)
[ERROR] at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:81)
[ERROR] at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:56)
[ERROR] at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128)
[ERROR] at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:305)
[ERROR] at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:192)
[ERROR] at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:105)
[ERROR] at org.apache.maven.cli.MavenCli.execute(MavenCli.java:956)
[ERROR] at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:288)
[ERROR] at org.apache.maven.cli.MavenCli.main(MavenCli.java:192)
[ERROR] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[ERROR] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
[ERROR] at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
[ERROR] at java.base/java.lang.reflect.Method.invoke(Method.java:567)
[ERROR] at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:282)
[ERROR] at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:225)
[ERROR] at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:406)
[ERROR] at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:347)
[ERROR]
[ERROR] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException
Not sure what information is relevant at this point, I'm happy to add whatever is needed to this question.
I tried OpenJDK 11, 12 and OracleJDK 12 as well as maven-sure-fire-plugin 2.22.2 and 3.0.0-M3. All give the same error.
I tried mvn clean and re-built. I tried removing my whole Maven repo, the .m2 directory.
I also tried adding <argLine>-Xmx1024m -XX:MaxPermSize=256m</argLine> as explained in The forked VM terminated without saying properly goodbye. VM crash or System.exit called as well as <argLine>-Xmx2048m -XX:MaxPermSize=1024m</argLine> just to make sure, but the error remained the same. I tried this only with Oracle JDK 12.
I also tried:
<configuration>
<forkCount>3</forkCount>
<reuseForks>true</reuseForks>
<argLine>-Xmx2048m -XX:MaxPermSize=1024m</argLine>
</configuration>
just in case the other two parameters were relevant and it failed with this error:
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-surefire-plugin:2.22.2:test (default-test) on project dashmanserver: Execution default-test of goal org.apache.maven.plugins:maven-surefire-plugin:2.22.2:test failed: java.lang.ClassNotFoundException: org.apache.maven.plugin.surefire.StartupReportConfiguration -> [Help 1]
I tried adding <testFailureIgnore>true</testFailureIgnore> but I get the same error.

Have the same issue; build works on one machine but on another machine it does not work.
Maven log on failing machine mentions a "dumpstream" file, e.g. \xxx\target\surefire-reports\2020-05-12T17-21-34_124.dumpstream
Peeking into that reveals:
# Created at 2020-05-12T17:21:35.135
Ursache: java.lang.ClassNotFoundException: LastName\/m2\repository\javax\servlet\javax/servlet-api\4/0/1\javax/servlet-api-4/0/1/jar;C:\Users\FirstName
So it turns out that I have "c:\users\FirstName LastName" as user directory, e.g. a space in my username, and I would assume that since servlet-api 4.0.1 does not have a module-info.class so there's some lookup in MANIFEST.MF I believe or whatever.
The other machine where the build is running fine is with a user directory that does not have a space in its name.
Weird thing is that it happens only when running tests, and it does not seem to matter whether useModulePath is true or false for maven-surefire-plugin

maven: Unable to run junit5-jupiter-starter-maven?

I downloaded the current version of the JUnit 5 sample code from https://github.com/junit-team/junit5-samples/tree/r5.2.0/ and extracted the subfolder junit5-jupiter-starter-maven to a local temp folder.
Then I openend a console window and tried to run that sample with mvnw clean test, but all I got was an java.lang.NoClassDefFoundError: org/junit/platform/launcher/core/LauncherFactory
Full maven output (of re-run without downloads):
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building junit5-vanilla-maven 1.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) # junit5-vanilla-maven ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory C:\temp\junit5-jupiter-starter-maven\src\main\resources
[INFO]
[INFO] --- maven-compiler-plugin:3.7.0:compile (default-compile) # junit5-vanilla-maven ---
[INFO] Nothing to compile - all classes are up to date
[INFO]
[INFO] --- maven-resources-plugin:2.6:testResources (default-testResources) # junit5-vanilla-maven ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory C:\temp\junit5-jupiter-starter-maven\src\test\resources
[INFO]
[INFO] --- maven-compiler-plugin:3.7.0:testCompile (default-testCompile) # junit5-vanilla-maven ---
[INFO] Nothing to compile - all classes are up to date
[INFO]
[INFO] --- maven-surefire-plugin:2.21.0:test (default-test) # junit5-vanilla-maven ---
[INFO]
[INFO] -------------------------------------------------------
[INFO] T E S T S
[INFO] -------------------------------------------------------
[INFO]
[INFO] Results:
[INFO]
[INFO] Tests run: 0, Failures: 0, Errors: 0, Skipped: 0
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 3.245 s
[INFO] Finished at: 2018-06-01T16:31:25+02:00
[INFO] Final Memory: 11M/306M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-surefire-plugin:2.21.0:test (default-test) on project junit5-vanilla-maven: There are test failures.
[ERROR]
[ERROR] Please refer to C:\temp\junit5-jupiter-starter-maven\target\surefire-reports for the individual test results.
[ERROR] Please refer to dump files (if any exist) [date]-jvmRun[N].dump, [date].dumpstream and [date]-jvmRun[N].dumpstream.
[ERROR] There was an error in the forked process
[ERROR] java.lang.NoClassDefFoundError: org/junit/platform/launcher/core/LauncherFactory
[ERROR] org.apache.maven.surefire.booter.SurefireBooterForkException: There was an error in the forked process
[ERROR] java.lang.NoClassDefFoundError: org/junit/platform/launcher/core/LauncherFactory
[ERROR] at org.apache.maven.plugin.surefire.booterclient.ForkStarter.fork(ForkStarter.java:658)
[ERROR] at org.apache.maven.plugin.surefire.booterclient.ForkStarter.fork(ForkStarter.java:533)
[ERROR] at org.apache.maven.plugin.surefire.booterclient.ForkStarter.run(ForkStarter.java:278)
[ERROR] at org.apache.maven.plugin.surefire.booterclient.ForkStarter.run(ForkStarter.java:244)
[ERROR] at org.apache.maven.plugin.surefire.AbstractSurefireMojo.executeProvider(AbstractSurefireMojo.java:1149)
[ERROR] at org.apache.maven.plugin.surefire.AbstractSurefireMojo.executeAfterPreconditionsChecked(AbstractSurefireMojo.java:978)
[ERROR] at org.apache.maven.plugin.surefire.AbstractSurefireMojo.execute(AbstractSurefireMojo.java:854)
[ERROR] at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:134)
[ERROR] at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:208)
[ERROR] at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:154)
[ERROR] at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:146)
[ERROR] at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:117)
[ERROR] at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:81)
[ERROR] at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51)
[ERROR] at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128)
[ERROR] at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:309)
[ERROR] at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:194)
[ERROR] at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:107)
[ERROR] at org.apache.maven.cli.MavenCli.execute(MavenCli.java:993)
[ERROR] at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:345)
[ERROR] at org.apache.maven.cli.MavenCli.main(MavenCli.java:191)
[ERROR] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[ERROR] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
[ERROR] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
[ERROR] at java.lang.reflect.Method.invoke(Method.java:498)
[ERROR] at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
[ERROR] at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
[ERROR] at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
[ERROR] at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
[ERROR] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[ERROR] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
[ERROR] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
[ERROR] at java.lang.reflect.Method.invoke(Method.java:498)
[ERROR] at org.apache.maven.wrapper.BootstrapMainStarter.start(BootstrapMainStarter.java:39)
[ERROR] at org.apache.maven.wrapper.WrapperExecutor.execute(WrapperExecutor.java:122)
[ERROR] at org.apache.maven.wrapper.MavenWrapperMain.main(MavenWrapperMain.java:50)
[ERROR]
[ERROR] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException
mvnw --version:
Apache Maven 3.5.0 (ff8f5e7444045639af65f6095c62210b5713f426; 2017-04-03T21:39:06+02:00)
Maven home: C:\Users\<XXX>\.m2\wrapper\dists\apache-maven-3.5.0-bin\6ps54u5pnnbbpr6ds9rppcc7iv\apache-maven-3.5.0
Java version: 1.8.0_171, vendor: Oracle Corporation
Java home: C:\Program Files\Java\jdk1.8.0_171\jre
Default locale: de_AT, platform encoding: Cp1252
OS name: "windows 10", version: "10.0", arch: "amd64", family: "windows"
Did I do something wrong, or can you reproduce this problem?

Since the error is
[ERROR] java.lang.NoClassDefFoundError: org/junit/platform/launcher/core/LauncherFactory
I suggest to check the junit-platform-launcher jar file. Maybe it is corrupted.
It should be the one of\.m2\repository\org\junit\platform\junit-platform-launcher\1.2.0\junit-platform-launcher-1.2.0.jar

For my it was a different problem. Multimodule maven project has two modules A and B, where A is using junit-pioneer:1.9.1 (having transitive dependency from junit-platform-launcher:1.8.2) when module B doesn't use junit-pioneer but fails to build because of java.lang.NoClassDefFoundError: org/junit/platform/launcher/core/LauncherFactory when building the whole project with mvn clean install.
My solution was to add (unused) test dependency from junit-pioneer to module B.

Trying to run mvn exec and getting mojo exception on plugin

So I am running
mvn exec:java -Dexec.mainClass=”com.utm.csc.HTMLParser” -Dexec.args=”http://www.simplehtmlguide.com”
for my Java project. It runs in Eclipse but with the command above, gives me the following errors:
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building assignment1 1.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- exec-maven-plugin:1.4.0:java (default-cli) # assignment1 ---
[WARNING]
java.lang.ClassNotFoundException: ”com.utm.csc.HTMLParser”
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at org.codehaus.mojo.exec.ExecJavaMojo$1.run(ExecJavaMojo.java:281)
at java.lang.Thread.run(Thread.java:745)
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 1.064 s
[INFO] Finished at: 2016-01-24T16:17:21-05:00
[INFO] Final Memory: 9M/155M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.codehaus.mojo:exec-maven- plugin:1.4.0:java (default-cli) on project assignment1: An exception occured while executing the Java class. ”com.utm.csc.HTMLParser” -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException
This is an image of my paths
I am using OS X El Capitan on a 64-bit MacBook Air mid-2012. What am I doing incorrectly?

The error is that you are giving the argument incorrectly. Your command should be:
mvn clean compile exec:java -Dexec.mainClass=com.utm.csc.HTMLParser -Dexec.args=http://www.simplehtmlguide.com
Notice the lack of quotes. This can be hinted from the error message:
java.lang.ClassNotFoundException: ”com.utm.csc.HTMLParser”
means that somehow, Java searched for a class called ”com.utm.csc.HTMLParser” but it didn't find any, simply because it is actually named com.utm.csc.HTMLParser, without the quotes.

Don't forget to compile first. exec:java doesn't do it by default.
mvn clean compile exec:java -Dexec.mainClass=”com.utm.csc.HTMLParser” -Dexec.args=”http://www.simplehtmlguide.com”

Maven 3: Maven in 5 minutes "mvn archetype:generate..." command NOT WORKING

I installed Maven 3.1.1 for the first time. In the "Maven in 5 Minutes" getting-started guide
http://maven.apache.org/guides/getting-started/maven-in-five-minutes.html
it says to verify the installation with
mvn --version
I got the expected response:
Apache Maven 3.1.1 (0728685237757ffbf44136acec0402957f723d9a; 2013-09-17 11:22:22-0400)
Maven home: C:\applications\programming\apache-maven-3.1.1
Java version: 1.6.0_17, vendor: Sun Microsystems Inc.
Java home: C:\applications\programming\java_6_17\jre
Default locale: en_US, platform encoding: Cp1252
OS name: "windows 7", version: "6.1", arch: "x86", family: "windows"
In the next step, under "Creating a project" it says to create a new directory, open a command prompt in that directory, and execute
mvn archetype:generate -DgroupId=com.mycompany.app -DartifactId=my-app -DarchetypeArtifactId=maven-archetype-quickstart -DinteractiveMode=false
I created a directory called xjmaven, ran the command in it, and it's not working. This is the response:
[R:\jeffy\programming\sandbox\xjmaven]mvn archetype:generate -DgroupId=xbnjava -DartifactId=XBN-Java -Darchetype ArtifactId=maven-archetype-quickstart -DinteractiveMode=false
[INFO] Scanning for projects...
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 0.251s
[INFO] Finished at: Sat Nov 23 12:11:56 EST 2013
[INFO] Final Memory: 2M/4M
[INFO] ------------------------------------------------------------------------
[ERROR] The goal you specified requires a project to execute but there is no POM in this directory (R:\jeffy\programming\sandbox\xjmaven). Please verify you invoked Maven from the correct directory. -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MissingProjectException
I looked up the parameters groupId, artifactId and archetypeArtifactId, and have tried some different values (as you can see above), but I still get the same BUILD FAILURE response.
I manually put the pom.xml file (from in the same webpage) in the xjmaven directory, and ran it again. It downloaded a bunch of stuff (although not to xjmaven), but then failed with this message:
[INFO] Generating project in Interactive mode
Downloading: http://repo.maven.apache.org/maven2/org/apache/maven/archetypes/true/1.0/true-1.0.jar
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Skipping Maven Quick Start Archetype
[INFO] This project has been banned from the build due to previous failures.
[INFO] ------------------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 45.047s
[INFO] Finished at: Sat Nov 23 12:04:01 EST 2013
[INFO] Final Memory: 7M/17M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-archetype-plugin:2.2:generate (default-cli) on project XBN-Java: The desired archetype does not exist (org.apache.maven.archetypes:true:1.0) -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
Repeating the command gives this response:
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building Maven Quick Start Archetype 1.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] >>> maven-archetype-plugin:2.2:generate (default-cli) # XBN-Java >>>
[INFO]
[INFO] <<< maven-archetype-plugin:2.2:generate (default-cli) # XBN-Java <<<
[INFO]
[INFO] --- maven-archetype-plugin:2.2:generate (default-cli) # XBN-Java ---
[INFO] Generating project in Interactive mode
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Skipping Maven Quick Start Archetype
[INFO] This project has been banned from the build due to previous failures.
[INFO] ------------------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 4.444s
[INFO] Finished at: Sat Nov 23 12:04:32 EST 2013
[INFO] Final Memory: 8M/14M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-archetype-plugin:2.2:generate (default-cli) on project XBN-Java: The desired archetype does not exist (org.apache.maven.archetypes:true:1.0) -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
I deleted pom.xml (it's the only file in the directory...the stuff it downloaded is not there), and started over again. Everything happens (badly) as I write above.
I remember trying Maven a few years ago, and could also not get past the getting-started stage.
If anyone has some advice on how to get past this, it would be appreciated. Really frustrated.

Maybe you are using Windows PowerShell?
If so, you'll need to put quotes around the parameter definitions:
mvn archetype:generate "-DarchetypeGroupId=org.apache.maven.archetypes" "-DgroupId=com.mycompany.app" "-DartifactId=my-app"

You have some syntactical errors while executing the generate goal. Moreover, you need not create the pom.xml or any dir sturcture. You will notice that the generate goal creates a directory with the same name given as the artifactId.
e.g. you are missing the convention like -DgroupId should be com.company.app (not a big issue though), having space in -Darchetype ArtifactId, etc.
I just tried below and it worked :
mvn archetype:generate -DgroupId=com.mycompany.app -DartifactId=my-app -DarchetypeArtifactId=maven-archetype-quickstart -DinteractiveMode=false

I was having a similar issue on powershell. I switched to command prompt and executed the same command and it works fine. Command that works on command prompt: mvn archetype:generate -DgroupId=com.myapp-DartifactId=hellomaven -DarchetypeArtifactId=maven-archetype-quickstart -DinteractiveMode=false
The one that runs on powershell:
mvn archetype:generate "-DarchetypeGroupId=org.apache.maven.archetypes" "-DgroupId=com.myapp" "-DartifactId=my-app"