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Type: Bug
Resolution: Fixed
Priority: Minor
Component/s: kubernetes-plugin
Labels:
None
Environment:
Jenkins v2.222.1
kubernetes v1.25.3
kubernetes-client-api v4.9.1-1
kubernetes-credentials v0.6.2
Kubernetes cluster: v1.16.3 and v1.17.4

Similar Issues:

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I have updated the the kubernetes plugins and the kubernetes-credentials plugins from:

'kubernetes:1.18.3',
'kubernetes-credentials:0.4.0'

to

'kubernetes:1.25.3'
'kubernetes-client-api:4.9.1-1'
'kubernetes-credentials:0.6.2'

and now I can see the following exception in the Jenkins logs. The log is littered with this warning message. I am able to run all jobs as expected, and without any issues. We have two kubernetes clusters that we are using with jenkins. Jenkins is running on a Bare metal cluster with kubernetes version v1.16.3.

2020-04-27 08:20:25.450+0000 [id=71902]	INFO	o.c.j.p.k.KubernetesClientProvider#gracefulClose: Not closing io.fabric8.kubernetes.client.DefaultKubernetesClient@7274903e: there are still running (1) or queued (0) calls
2020-04-27 08:20:37.054+0000 [id=71903]	INFO	hudson.model.AsyncPeriodicWork#lambda$doRun$0: Started prometheus_async_worker
2020-04-27 08:20:37.178+0000 [id=71903]	INFO	hudson.model.AsyncPeriodicWork#lambda$doRun$0: Finished prometheus_async_worker. 124 ms
2020-04-27 08:20:44.904+0000 [id=2857]	WARNING	i.f.k.c.d.i.WatchConnectionManager$1#onFailure: Exec Failure
java.util.concurrent.RejectedExecutionException: Task okhttp3.RealCall$AsyncCall@1d4a676e rejected from java.util.concurrent.ThreadPoolExecutor@543ef1af[Terminated, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 18]
	at java.util.concurrent.ThreadPoolExecutor$AbortPolicy.rejectedExecution(ThreadPoolExecutor.java:2063)
	at java.util.concurrent.ThreadPoolExecutor.reject(ThreadPoolExecutor.java:830)
	at java.util.concurrent.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:1379)
	at okhttp3.RealCall$AsyncCall.executeOn(RealCall.java:183)
Caused: java.io.InterruptedIOException: executor rejected
	at okhttp3.RealCall$AsyncCall.executeOn(RealCall.java:186)
	at okhttp3.Dispatcher.promoteAndExecute(Dispatcher.java:186)
	at okhttp3.Dispatcher.enqueue(Dispatcher.java:137)
	at okhttp3.RealCall.enqueue(RealCall.java:127)
	at okhttp3.internal.ws.RealWebSocket.connect(RealWebSocket.java:193)
	at okhttp3.OkHttpClient.newWebSocket(OkHttpClient.java:435)
	at io.fabric8.kubernetes.client.dsl.internal.WatchConnectionManager.runWatch(WatchConnectionManager.java:158)
	at io.fabric8.kubernetes.client.dsl.internal.WatchConnectionManager.access$1200(WatchConnectionManager.java:50)
	at io.fabric8.kubernetes.client.dsl.internal.WatchConnectionManager$2$1.execute(WatchConnectionManager.java:321)
	at io.fabric8.kubernetes.client.dsl.internal.WatchConnectionManager$NamedRunnable.run(WatchConnectionManager.java:410)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
2020-04-27 08:21:16.904+0000 [id=2857]	WARNING	i.f.k.c.d.i.WatchConnectionManager$1#onFailure: Exec Failure
java.util.concurrent.RejectedExecutionException: Task okhttp3.RealCall$AsyncCall@cfe8b6d rejected from java.util.concurrent.ThreadPoolExecutor@543ef1af[Terminated, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 18]
	at java.util.concurrent.ThreadPoolExecutor$AbortPolicy.rejectedExecution(ThreadPoolExecutor.java:2063)
	at java.util.concurrent.ThreadPoolExecutor.reject(ThreadPoolExecutor.java:830)
	at java.util.concurrent.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:1379)
	at okhttp3.RealCall$AsyncCall.executeOn(RealCall.java:183)
Caused: java.io.InterruptedIOException: executor rejected
	at okhttp3.RealCall$AsyncCall.executeOn(RealCall.java:186)
	at okhttp3.Dispatcher.promoteAndExecute(Dispatcher.java:186)
	at okhttp3.Dispatcher.enqueue(Dispatcher.java:137)
	at okhttp3.RealCall.enqueue(RealCall.java:127)
	at okhttp3.internal.ws.RealWebSocket.connect(RealWebSocket.java:193)
	at okhttp3.OkHttpClient.newWebSocket(OkHttpClient.java:435)
	at io.fabric8.kubernetes.client.dsl.internal.WatchConnectionManager.runWatch(WatchConnectionManager.java:158)
	at io.fabric8.kubernetes.client.dsl.internal.WatchConnectionManager.access$1200(WatchConnectionManager.java:50)
	at io.fabric8.kubernetes.client.dsl.internal.WatchConnectionManager$2$1.execute(WatchConnectionManager.java:321)
	at io.fabric8.kubernetes.client.dsl.internal.WatchConnectionManager$NamedRunnable.run(WatchConnectionManager.java:410)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)

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