Stuck in 'Waiting for Agent' after updating agent from Ubuntu 20.04 to 22.04

Joshua von Damm

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Jun 10, 2022, 1:25:08 PM6/10/22

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Agent configuration for resources/environments is fine as it ran prior to the update.

When I trigger the pipeline now, it assigns to the agent, but then remains stuck in the 'waiting for agent' stage, and no output ever shows on the console.

I have multiple agents and eventually another one takes over the pipeline after the agent on 22.04 is stuck in the 'waiting' stage long enough.

I can ssh into the agent and manually run the scripts executed by the same pipeline.

On the agent page it shows as Idle.

I tried rebooting the system and restarting the agent with no luck.

Any help would be great, thanks!

Joshua von Damm

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Jun 10, 2022, 1:28:55 PM6/10/22

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Also server is version 21.3.0 and agent is version 22.1.0.

Joshua von Damm

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Jun 10, 2022, 2:14:17 PM6/10/22

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I found the supposed error in the go-agent.log:

22022-06-10 18:04:10,346 ERROR [scheduler-3] AgentController:92 - [Agent Loop] Error occurred during loop:
java.lang.reflect.InaccessibleObjectException: Unable to make field private java.lang.String java.util.regex.Pattern.pattern accessible: module java.base does not "opens java.util.regex" to unnamed module @13fee20c
at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(Unknown Source)
at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(Unknown Source)
at java.base/java.lang.reflect.Field.checkCanSetAccessible(Unknown Source)
at java.base/java.lang.reflect.Field.setAccessible(Unknown Source)
at com.google.gson.internal.reflect.UnsafeReflectionAccessor.makeAccessible(UnsafeReflectionAccessor.java:44)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.getBoundFields(ReflectiveTypeAdapterFactory.java:159)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.create(ReflectiveTypeAdapterFactory.java:102)
at com.google.gson.Gson.getAdapter(Gson.java:458)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.createBoundField(ReflectiveTypeAdapterFactory.java:117)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.getBoundFields(ReflectiveTypeAdapterFactory.java:166)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.create(ReflectiveTypeAdapterFactory.java:102)
at com.google.gson.Gson.getAdapter(Gson.java:458)
at com.google.gson.internal.bind.CollectionTypeAdapterFactory.create(CollectionTypeAdapterFactory.java:53)
at com.google.gson.Gson.getAdapter(Gson.java:458)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.createBoundField(ReflectiveTypeAdapterFactory.java:117)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.getBoundFields(ReflectiveTypeAdapterFactory.java:166)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.create(ReflectiveTypeAdapterFactory.java:102)
at com.google.gson.Gson.getDelegateAdapter(Gson.java:541)
at com.thoughtworks.go.remote.adapter.RuntimeTypeAdapterFactory.create(RuntimeTypeAdapterFactory.java:238)
at com.google.gson.Gson.getAdapter(Gson.java:458)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.createBoundField(ReflectiveTypeAdapterFactory.java:117)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.getBoundFields(ReflectiveTypeAdapterFactory.java:166)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.create(ReflectiveTypeAdapterFactory.java:102)
at com.google.gson.Gson.getAdapter(Gson.java:458)
at com.google.gson.internal.bind.CollectionTypeAdapterFactory.create(CollectionTypeAdapterFactory.java:53)
at com.google.gson.Gson.getAdapter(Gson.java:458)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.createBoundField(ReflectiveTypeAdapterFactory.java:117)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.getBoundFields(ReflectiveTypeAdapterFactory.java:166)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.create(ReflectiveTypeAdapterFactory.java:102)
at com.google.gson.Gson.getAdapter(Gson.java:458)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.createBoundField(ReflectiveTypeAdapterFactory.java:117)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.getBoundFields(ReflectiveTypeAdapterFactory.java:166)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.create(ReflectiveTypeAdapterFactory.java:102)
at com.google.gson.Gson.getAdapter(Gson.java:458)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.createBoundField(ReflectiveTypeAdapterFactory.java:117)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.getBoundFields(ReflectiveTypeAdapterFactory.java:166)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.create(ReflectiveTypeAdapterFactory.java:102)

at com.google.gson.Gson.getDelegateAdapter(Gson.java:541)
at com.thoughtworks.go.remote.adapter.RuntimeTypeAdapterFactory.create(RuntimeTypeAdapterFactory.java:238)
at com.google.gson.Gson.getAdapter(Gson.java:458)
at com.google.gson.Gson.fromJson(Gson.java:931)
at com.google.gson.Gson.fromJson(Gson.java:897)
at com.google.gson.Gson.fromJson(Gson.java:846)
at com.google.gson.Gson.fromJson(Gson.java:817)
at com.thoughtworks.go.agent.RemotingClient.getWork(RemotingClient.java:79)
at com.thoughtworks.go.agent.AgentHTTPClientController.retrieveWork(AgentHTTPClientController.java:153)
at com.thoughtworks.go.agent.AgentHTTPClientController.work(AgentHTTPClientController.java:130)
at com.thoughtworks.go.agent.AgentController.loop(AgentController.java:86)
at jdk.internal.reflect.GeneratedMethodAccessor9.invoke(Unknown Source)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.base/java.lang.reflect.Method.invoke(Unknown Source)
at org.springframework.scheduling.support.ScheduledMethodRunnable.run(ScheduledMethodRunnable.java:65)
at org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.run(DelegatingErrorHandlingRunnable.java:54)
at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.base/java.util.concurrent.FutureTask.runAndReset(Unknown Source)
at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown Source)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.base/java.lang.Thread.run(Unknown Source)

Chad Wilson

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Jun 10, 2022, 6:58:18 PM6/10/22

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Hi there

Please take a look at https://groups.google.com/g/go-cd/c/5c1X3diKmag and/or https://github.com/gocd/gocd/issues/10265

In your case, the agent bootstrapper version is too new, and running with a Java version incompatible with the server.

In your case I would suggest to either downgrade the agent bootstrapper to 21.4.0/21.3.0 or upgrade the server to at least 21.4.0 rather than workaround with arguments as in the GitHub issue.

-Chad

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Joshua von Damm

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Jun 14, 2022, 3:59:55 PM6/14/22

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Hello Chad,

Thanks for the detailed response! Upgrading to server to latest worked beautifully.

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