Issue Running GeoWave Example - java.lang.IllegalThreadStateException

[bloom256]

Hello GeoWave Team,

I’m experiencing an issue when running the GeoWave example CustomAdapterExample from version 2.0.1. Although the example appears to work (with correct output), it ends with errors related to thread cleanup.

Setup Information
OS: Ubuntu 20.04
Java Version: openjdk version "1.8.0_422"
Maven Version: Apache Maven 3.6.3
GeoWave Version: 2.0.1 (tagged release)

Steps to Reproduce
After cloning the repo and checking out tag v2.0.1, I ran the following commands:

mvn clean install -Dfindbugs.skip -Dspotbugs.skip -DskipTests
mvn clean package -P geowave-tools-singlejar -Dfindbugs.skip -Dspotbugs.skip -DskipTests
cd examples/java-api
mvn exec:java -Dexec.mainClass="org.locationtech.geowave.examples.adapter.CustomAdapterExample"

The example executes successfully with expected output, but at the end, I get the error related to threads cleanup:

~/geowave/examples/java-api$ mvn exec:java -Dexec.mainClass="org.locationtech.geowave.examples.adapter.CustomAdapterExample"
OpenJDK 64-Bit Server VM warning: ignoring option MaxPermSize=512m; support was removed in 8.0
[INFO] Scanning for projects...
[WARNING] 
[WARNING] Some problems were encountered while building the effective model for org.locationtech.geowave:geowave-example:jar:2.0.1
[WARNING] 'dependencyManagement.dependencies.dependency.(groupId:artifactId:type:classifier)' must be unique: org.eclipse.jetty:jetty-util:jar -> duplicate declaration of version ${jetty.version} @ org.locationtech.geowave:geowave-parent:2.0.1, /home/docker/geowave/pom.xml, line 197, column 16
[WARNING] 
[WARNING] It is highly recommended to fix these problems because they threaten the stability of your build.
[WARNING] 
[WARNING] For this reason, future Maven versions might no longer support building such malformed projects.
[WARNING] 
Downloading from central: https://repo.maven.apache.org/maven2/org/codehaus/mojo/sonar-maven-plugin/2.5/sonar-maven-plugin-2.5.pom
Downloaded from central: https://repo.maven.apache.org/maven2/org/codehaus/mojo/sonar-maven-plugin/2.5/sonar-maven-plugin-2.5.pom (7.8 kB at 10 kB/s)
Downloading from central: https://repo.maven.apache.org/maven2/org/codehaus/mojo/sonar-maven-plugin/2.5/sonar-maven-plugin-2.5.jar
Downloaded from central: https://repo.maven.apache.org/maven2/org/codehaus/mojo/sonar-maven-plugin/2.5/sonar-maven-plugin-2.5.jar (50 kB at 175 kB/s)
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Downloading from central: https://repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-javadoc-plugin/2.9.1/maven-javadoc-plugin-2.9.1.jar
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Downloading from central: https://repo.maven.apache.org/maven2/org/eclipse/m2e/lifecycle-mapping/1.0.0/lifecycle-mapping-1.0.0.pom
[WARNING] The POM for org.eclipse.m2e:lifecycle-mapping:jar:1.0.0 is missing, no dependency information available
Downloading from central: https://repo.maven.apache.org/maven2/org/eclipse/m2e/lifecycle-mapping/1.0.0/lifecycle-mapping-1.0.0.jar
[WARNING] Failed to retrieve plugin descriptor for org.eclipse.m2e:lifecycle-mapping:1.0.0: Plugin org.eclipse.m2e:lifecycle-mapping:1.0.0 or one of its dependencies could not be resolved: Could not find artifact org.eclipse.m2e:lifecycle-mapping:jar:1.0.0 in central (https://repo.maven.apache.org/maven2)
Downloading from central: https://repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-metadata.xml
Downloading from central: https://repo.maven.apache.org/maven2/org/codehaus/mojo/maven-metadata.xml
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Downloading from central: https://repo.maven.apache.org/maven2/org/codehaus/mojo/exec-maven-plugin/maven-metadata.xml
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Downloading from central: https://repo.maven.apache.org/maven2/org/codehaus/mojo/exec-maven-plugin/3.5.0/exec-maven-plugin-3.5.0.pom
Downloaded from central: https://repo.maven.apache.org/maven2/org/codehaus/mojo/exec-maven-plugin/3.5.0/exec-maven-plugin-3.5.0.pom (14 kB at 69 kB/s)
Downloading from central: https://repo.maven.apache.org/maven2/org/codehaus/mojo/mojo-parent/86/mojo-parent-86.pom
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Downloading from central: https://repo.maven.apache.org/maven2/org/junit/junit-bom/5.11.0/junit-bom-5.11.0.pom
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Downloading from central: https://repo.maven.apache.org/maven2/org/codehaus/mojo/exec-maven-plugin/3.5.0/exec-maven-plugin-3.5.0.jar
Downloaded from central: https://repo.maven.apache.org/maven2/org/codehaus/mojo/exec-maven-plugin/3.5.0/exec-maven-plugin-3.5.0.jar (87 kB at 316 kB/s)
[INFO] 
[INFO] --------------< org.locationtech.geowave:geowave-example >--------------
[INFO] Building GeoWave Examples 2.0.1
[INFO] --------------------------------[ jar ]---------------------------------
[WARNING] The POM for org.eclipse.m2e:lifecycle-mapping:jar:1.0.0 is missing, no dependency information available
[WARNING] Failed to retrieve plugin descriptor for org.eclipse.m2e:lifecycle-mapping:1.0.0: Plugin org.eclipse.m2e:lifecycle-mapping:1.0.0 or one of its dependencies could not be resolved: Failure to find org.eclipse.m2e:lifecycle-mapping:jar:1.0.0 in https://repo.maven.apache.org/maven2 was cached in the local repository, resolution will not be reattempted until the update interval of central has elapsed or updates are forced
[INFO] 
[INFO] --- exec-maven-plugin:3.5.0:java (default-cli) @ geowave-example ---
Downloading from central: https://repo.maven.apache.org/maven2/org/apache/maven/resolver/maven-resolver-util/1.4.1/maven-resolver-util-1.4.1.pom
Downloaded from central: https://repo.maven.apache.org/maven2/org/apache/maven/resolver/maven-resolver-util/1.4.1/maven-resolver-util-1.4.1.pom (2.8 kB at 16 kB/s)
Downloading from central: https://repo.maven.apache.org/maven2/org/apache/maven/resolver/maven-resolver/1.4.1/maven-resolver-1.4.1.pom
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Downloading from central: https://repo.maven.apache.org/maven2/org/apache/maven/resolver/maven-resolver-api/1.4.1/maven-resolver-api-1.4.1.pom
Downloaded from central: https://repo.maven.apache.org/maven2/org/apache/maven/resolver/maven-resolver-api/1.4.1/maven-resolver-api-1.4.1.pom (2.6 kB at 15 kB/s)
Downloading from central: https://repo.maven.apache.org/maven2/org/codehaus/plexus/plexus-utils/4.0.2/plexus-utils-4.0.2.pom
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Downloading from central: https://repo.maven.apache.org/maven2/org/codehaus/plexus/plexus-xml/3.0.1/plexus-xml-3.0.1.pom
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Downloading from central: https://repo.maven.apache.org/maven2/org/junit/junit-bom/5.10.1/junit-bom-5.10.1.pom
Downloaded from central: https://repo.maven.apache.org/maven2/org/junit/junit-bom/5.10.1/junit-bom-5.10.1.pom (5.6 kB at 32 kB/s)
Downloading from central: https://repo.maven.apache.org/maven2/org/ow2/asm/asm/9.7.1/asm-9.7.1.pom
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Downloading from central: https://repo.maven.apache.org/maven2/org/ow2/asm/asm-tree/9.7.1/asm-tree-9.7.1.pom
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Downloading from central: https://repo.maven.apache.org/maven2/org/apache/maven/resolver/maven-resolver-util/1.4.1/maven-resolver-util-1.4.1.jar
Downloading from central: https://repo.maven.apache.org/maven2/org/apache/maven/resolver/maven-resolver-api/1.4.1/maven-resolver-api-1.4.1.jar
Downloading from central: https://repo.maven.apache.org/maven2/org/apache/commons/commons-exec/1.4.0/commons-exec-1.4.0.jar
Downloading from central: https://repo.maven.apache.org/maven2/org/codehaus/plexus/plexus-xml/3.0.1/plexus-xml-3.0.1.jar
Downloading from central: https://repo.maven.apache.org/maven2/org/codehaus/plexus/plexus-utils/4.0.2/plexus-utils-4.0.2.jar
Downloaded from central: https://repo.maven.apache.org/maven2/org/apache/maven/resolver/maven-resolver-util/1.4.1/maven-resolver-util-1.4.1.jar (168 kB at 600 kB/s)
Downloading from central: https://repo.maven.apache.org/maven2/org/ow2/asm/asm/9.7.1/asm-9.7.1.jar
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Downloading from central: https://repo.maven.apache.org/maven2/org/ow2/asm/asm-commons/9.7.1/asm-commons-9.7.1.jar
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Downloading from central: https://repo.maven.apache.org/maven2/org/ow2/asm/asm-tree/9.7.1/asm-tree-9.7.1.jar
Downloaded from central: https://repo.maven.apache.org/maven2/org/apache/maven/resolver/maven-resolver-api/1.4.1/maven-resolver-api-1.4.1.jar (149 kB at 348 kB/s)
Downloaded from central: https://repo.maven.apache.org/maven2/org/ow2/asm/asm/9.7.1/asm-9.7.1.jar (126 kB at 236 kB/s)
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Downloaded from central: https://repo.maven.apache.org/maven2/org/ow2/asm/asm-commons/9.7.1/asm-commons-9.7.1.jar (73 kB at 130 kB/s)
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Nov 04, 2024 4:16:13 PM org.geoserver.platform.GeoServerExtensions checkContext
WARNING: Extension lookup 'GeoServerResourceLoader', but ApplicationContext is unset.
Nov 04, 2024 4:16:13 PM org.geoserver.platform.GeoServerExtensions checkContext
WARNING: Extension lookup 'GeoServerResourceLoader', but ApplicationContext is unset.
Nov 04, 2024 4:16:13 PM org.geoserver.platform.GeoServerExtensions checkContext
WARNING: Extension lookup 'ExtensionFilter', but ApplicationContext is unset.
Nov 04, 2024 4:16:13 PM org.geoserver.platform.GeoServerExtensions checkContext
WARNING: Extension lookup 'ExtensionProvider', but ApplicationContext is unset.
Nov 04, 2024 4:16:13 PM org.geoserver.platform.GeoServerExtensions checkContext
WARNING: Extension lookup 'ExtensionFilter', but ApplicationContext is unset.
Nov 04, 2024 4:16:13 PM org.geoserver.platform.GeoServerExtensions checkContext
WARNING: Extension lookup 'GeoServerResourceLoader', but ApplicationContext is unset.
Nov 04, 2024 4:16:13 PM org.geoserver.platform.GeoServerExtensions checkContext
WARNING: Extension lookup 'GeoServerResourceLoader', but ApplicationContext is unset.
Nov 04, 2024 4:16:13 PM org.geoserver.platform.GeoServerExtensions checkContext
WARNING: Extension lookup 'ExtensionFilter', but ApplicationContext is unset.
Nov 04, 2024 4:16:13 PM org.geoserver.platform.GeoServerExtensions checkContext
WARNING: Extension lookup 'ExtensionProvider', but ApplicationContext is unset.
Nov 04, 2024 4:16:13 PM org.geoserver.platform.GeoServerExtensions checkContext
WARNING: Extension lookup 'ExtensionFilter', but ApplicationContext is unset.
Nov 04, 2024 4:16:13 PM java.util.prefs.FileSystemPreferences$1 run
INFO: Created user preferences directory.
Executing query, expecting to match Roman Colosseum and Eiffel Tower...
Query match: Roman Colosseum
Query match: Eiffel Tower
[WARNING] thread Thread[GT authority factory disposer,5,org.locationtech.geowave.examples.adapter.CustomAdapterExample] was interrupted but is still alive after waiting at least 15000msecs
[WARNING] thread Thread[GT authority factory disposer,5,org.locationtech.geowave.examples.adapter.CustomAdapterExample] will linger despite being asked to die via interruption
[WARNING] thread Thread[WeakCollectionCleaner,8,org.locationtech.geowave.examples.adapter.CustomAdapterExample] will linger despite being asked to die via interruption
[WARNING] thread Thread[Timer-0,5,org.locationtech.geowave.examples.adapter.CustomAdapterExample] will linger despite being asked to die via interruption
[WARNING] NOTE: 3 thread(s) did not finish despite being asked to via interruption. This is not a problem with exec:java, it is a problem with the running code. Although not serious, it should be remedied.
[WARNING] Couldn't destroy threadgroup org.codehaus.mojo.exec.ExecJavaMojo$IsolatedThreadGroup[name=org.locationtech.geowave.examples.adapter.CustomAdapterExample,maxpri=10]
java.lang.IllegalThreadStateException
    at java.lang.ThreadGroup.destroy (ThreadGroup.java:778)
    at org.codehaus.mojo.exec.ExecJavaMojo.execute (ExecJavaMojo.java:330)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:137)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:210)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:156)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:148)
    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:56)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:305)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:192)
    at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:105)
    at org.apache.maven.cli.MavenCli.execute (MavenCli.java:957)
    at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:289)
    at org.apache.maven.cli.MavenCli.main (MavenCli.java:193)
    at sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke (Method.java:498)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:282)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:225)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:406)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:347)
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  30.691 s
[INFO] Finished at: 2024-11-04T16:16:28Z
[INFO] ------------------------------------------------------------------------

As I’m completely new to the Java ecosystem, I’m unsure if this is expected behavior or if I’m missing a configuration step. I would be extremely grateful for guidance on resolving this issue.

Thank you for your time and assistance!