Hi there,

I have a bit of an issue with the GoCD agent on a Rocky 8 x86 installation.

Whenever I launch the systemd go-agent, the following exception is produced 
in the /var/log/go-agent/go-agent.log file:

2022-04-06 19:32:44,065 ERROR [scheduler-1] 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 @4e04a765 
       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.GeneratedMethodAccessor8.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)

The Rocky 8 VM is currently using Java 17:

[root@mbv01 ~]# java --version 
openjdk 17.0.2 2022-01-18 LTS 
OpenJDK Runtime Environment 21.9 (build 17.0.2+8-LTS) 
OpenJDK 64-Bit Server VM 21.9 (build 17.0.2+8-LTS, mixed mode, sharing)

But I have also tried with java-8-openjdk and java-11-openjdk without it 
having any effect on the produced Exception.

Do you have any tips on how to resolve this?

Best Regards
Rasmus

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