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Bug
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Resolution: Unresolved
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Major
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Jenkins: 2.440.2
Agents: 3206.vb_15dcf73f6a_9
Java (Jenkins, Agents): 17.0.10
support-core-plugin: 1421.v1a_899a_c02a_54
After updating to the latest version of the support core plugin I noticed that my inbound agents remain offline and the only way to bring them back online is to reboot the agents when the Jenkins is up and running.
I get the following Jenkins warning for each agent which is trying to connect:
[id=76] WARNING j.u.ErrorLoggingExecutorService#lambda$wrap$0 java.lang.NullPointerException: Cannot invoke "java.lang.Boolean.booleanValue()" because the return value of "java.util.Map.put(Object, Object)" is null at com.cloudbees.jenkins.support.impl.SlaveLaunchLogs$Jenkins72799Hack.preOnline(SlaveLaunchLogs.java:200) at hudson.slaves.SlaveComputer.setChannel(SlaveComputer.java:720) at jenkins.slaves.DefaultJnlpSlaveReceiver.afterChannel(DefaultJnlpSlaveReceiver.java:176) at org.jenkinsci.remoting.engine.JnlpConnectionState.fire(JnlpConnectionState.java:337) at org.jenkinsci.remoting.engine.JnlpConnectionState.fireAfterChannel(JnlpConnectionState.java:428) at jenkins.agents.WebSocketAgents$Session.lambda$opened$2(WebSocketAgents.java:136) at jenkins.util.ContextResettingExecutorService$1.run(ContextResettingExecutorService.java:28) at jenkins.security.ImpersonatingExecutorService$1.run(ImpersonatingExecutorService.java:68) at jenkins.util.ErrorLoggingExecutorService.lambda$wrap$0(ErrorLoggingExecutorService.java:51) at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) at java.base/java.util.concurrent.FutureTask.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)
By disabling the support core plugin the problem disappears.
