Node troubles

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Node troubles

sreeramk
Hello

   I have about 20 nodes of various RHEL versions and one team's nodes always pose certain problems and cause their pipelines to fail.  For a while, I was able to get them to pass by 'bringing nodes online on-demand' because it would refresh the connection.  But lately that strategy has also failed.  The slaves had a higher version of Java than the master and after updating the master the problem seemed to go away only to come back again like this.  If I disconnect, offline the node and bring it back, the logs are clean. But once the pipeline starts running again, it fails.  Any help would be much appreciated.  Thanks. 


   I'm running Jenkins master version: 2.91.  

JDK version on master RHEL-7
[support@10.0.156.53 ~]$ java -version
openjdk version "1.8.0_141"
OpenJDK Runtime Environment (build 1.8.0_141-b16)
OpenJDK 64-Bit Server VM (build 25.141-b16, mixed mode)

Slave - 
RHEL 7.3
openjdk version "1.8.0_131"
OpenJDK Runtime Environment (build 1.8.0_131-b11)
OpenJDK 64-Bit Server VM (build 25.131-b11, mixed mode)

Pipeline fails with such errors:

[Pipeline] End of Pipeline
java.io.EOFException
	at java.io.ObjectInputStream$PeekInputStream.readFully(ObjectInputStream.java:2638)
	at java.io.ObjectInputStream$BlockDataInputStream.readShort(ObjectInputStream.java:3113)
	at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:853)
	at java.io.ObjectInputStream.<init>(ObjectInputStream.java:349)
	at hudson.remoting.ObjectInputStreamEx.<init>(ObjectInputStreamEx.java:48)
	at hudson.remoting.AbstractSynchronousByteArrayCommandTransport.read(AbstractSynchronousByteArrayCommandTransport.java:35)
	at hudson.remoting.SynchronousCommandTransport$ReaderThread.run(SynchronousCommandTransport.java:63)
Caused: java.io.IOException: Unexpected termination of the channel
	at hudson.remoting.SynchronousCommandTransport$ReaderThread.run(SynchronousCommandTransport.java:77)
Caused: hudson.remoting.ChannelClosedException: Remote call on 10.0.135.15 failed. The channel is closing down or has closed down
	at hudson.remoting.Channel.call(Channel.java:901)
	at hudson.FilePath.act(FilePath.java:986)
	at hudson.FilePath.act(FilePath.java:975)
	at hudson.FilePath.mkdirs(FilePath.java:1158)
	at org.jenkinsci.plugins.durabletask.FileMonitoringTask$FileMonitoringController.<init>(FileMonitoringTask.java:113)
	at org.jenkinsci.plugins.durabletask.BourneShellScript$ShellController.<init>(BourneShellScript.java:198)
	at org.jenkinsci.plugins.durabletask.BourneShellScript$ShellController.<init>(BourneShellScript.java:190)
	at org.jenkinsci.plugins.durabletask.BourneShellScript.launchWithCookie(BourneShellScript.java:111)
	at org.jenkinsci.plugins.durabletask.FileMonitoringTask.launch(FileMonitoringTask.java:64)
	at org.jenkinsci.plugins.workflow.steps.durable_task.DurableTaskStep$Execution.start(DurableTaskStep.java:177)
	at org.jenkinsci.plugins.workflow.cps.DSL.invokeStep(DSL.java:224)
	at org.jenkinsci.plugins.workflow.cps.DSL.invokeMethod(DSL.java:150)
	at org.jenkinsci.plugins.workflow.cps.CpsScript.invokeMethod(CpsScript.java:108)
	at sun.reflect.GeneratedMethodAccessor5286.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:93)
	at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:325)
	at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1213)
	at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1022)
	at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.call(PogoMetaClassSite.java:42)
	at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48)
	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:113)
	at org.kohsuke.groovy.sandbox.impl.Checker$1.call(Checker.java:155)
	at org.kohsuke.groovy.sandbox.GroovyInterceptor.onMethodCall(GroovyInterceptor.java:23)
	at org.jenkinsci.plugins.scriptsecurity.sandbox.groovy.SandboxInterceptor.onMethodCall(SandboxInterceptor.java:133)
	at org.kohsuke.groovy.sandbox.impl.Checker$1.call(Checker.java:153)
	at org.kohsuke.groovy.sandbox.impl.Checker.checkedCall(Checker.java:157)
	at org.kohsuke.groovy.sandbox.impl.Checker.checkedCall(Checker.java:127)
	at org.kohsuke.groovy.sandbox.impl.Checker.checkedCall(Checker.java:127)
	at com.cloudbees.groovy.cps.sandbox.SandboxInvoker.methodCall(SandboxInvoker.java:17)
Caused: java.io.IOException: remote file operation failed: /mnt/grandprix/homes/axsbuild/workspace/Sensor/Sensor_4.x_Groovy at hudson.remoting.Channel@3735998a:10.0.135.15
	at hudson.FilePath.act(FilePath.java:993)
	at hudson.FilePath.act(FilePath.java:975)
	at hudson.FilePath.mkdirs(FilePath.java:1158)
	at org.jenkinsci.plugins.durabletask.FileMonitoringTask$FileMonitoringController.<init>(FileMonitoringTask.java:113)
	at org.jenkinsci.plugins.durabletask.BourneShellScript$ShellController.<init>(BourneShellScript.java:198)
	at org.jenkinsci.plugins.durabletask.BourneShellScript$ShellController.<init>(BourneShellScript.java:190)
	at org.jenkinsci.plugins.durabletask.BourneShellScript.launchWithCookie(BourneShellScript.java:111)
	at org.jenkinsci.plugins.durabletask.FileMonitoringTask.launch(FileMonitoringTask.java:64)
	at org.jenkinsci.plugins.workflow.steps.durable_task.DurableTaskStep$Execution.start(DurableTaskStep.java:177)
	at org.jenkinsci.plugins.workflow.cps.DSL.invokeStep(DSL.java:224)
	at org.jenkinsci.plugins.workflow.cps.DSL.invokeMethod(DSL.java:150)
	at org.jenkinsci.plugins.workflow.cps.CpsScript.invokeMethod(CpsScript.java:108)
	at sun.reflect.GeneratedMethodAccessor5286.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:93)
	at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:325)
	at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1213)
	at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1022)
	at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.call(PogoMetaClassSite.java:42)
	at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48)
	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:113)
	at org.kohsuke.groovy.sandbox.impl.Checker$1.call(Checker.java:155)
	at org.kohsuke.groovy.sandbox.GroovyInterceptor.onMethodCall(GroovyInterceptor.java:23)
	at org.jenkinsci.plugins.scriptsecurity.sandbox.groovy.SandboxInterceptor.onMethodCall(SandboxInterceptor.java:133)
	at org.kohsuke.groovy.sandbox.impl.Checker$1.call(Checker.java:153)
	at org.kohsuke.groovy.sandbox.impl.Checker.checkedCall(Checker.java:157)
	at org.kohsuke.groovy.sandbox.impl.Checker.checkedCall(Checker.java:127)
	at org.kohsuke.groovy.sandbox.impl.Checker.checkedCall(Checker.java:127)
	at com.cloudbees.groovy.cps.sandbox.SandboxInvoker.methodCall(SandboxInvoker.java:17)
	at WorkflowScript.run(WorkflowScript:343)
	at ___cps.transform___(Native Method)
	at com.cloudbees.groovy.cps.impl.ContinuationGroup.methodCall(ContinuationGroup.java:57)
	at com.cloudbees.groovy.cps.impl.FunctionCallBlock$ContinuationImpl.dispatchOrArg(FunctionCallBlock.java:109)
	at com.cloudbees.groovy.cps.impl.FunctionCallBlock$ContinuationImpl.fixArg(FunctionCallBlock.java:82)
	at sun.reflect.GeneratedMethodAccessor196.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at com.cloudbees.groovy.cps.impl.ContinuationPtr$ContinuationImpl.receive(ContinuationPtr.java:72)
	at com.cloudbees.groovy.cps.impl.ContinuationGroup.methodCall(ContinuationGroup.java:60)
	at com.cloudbees.groovy.cps.impl.FunctionCallBlock$ContinuationImpl.dispatchOrArg(FunctionCallBlock.java:109)
	at com.cloudbees.groovy.cps.impl.FunctionCallBlock$ContinuationImpl.fixArg(FunctionCallBlock.java:82)
	at sun.reflect.GeneratedMethodAccessor196.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at com.cloudbees.groovy.cps.impl.ContinuationPtr$ContinuationImpl.receive(ContinuationPtr.java:72)
	at com.cloudbees.groovy.cps.impl.LocalVariableBlock$LocalVariable.get(LocalVariableBlock.java:39)
	at com.cloudbees.groovy.cps.LValueBlock$GetAdapter.receive(LValueBlock.java:30)
	at com.cloudbees.groovy.cps.impl.LocalVariableBlock.evalLValue(LocalVariableBlock.java:28)
	at com.cloudbees.groovy.cps.LValueBlock$BlockImpl.eval(LValueBlock.java:55)
	at com.cloudbees.groovy.cps.LValueBlock.eval(LValueBlock.java:16)
	at com.cloudbees.groovy.cps.Next.step(Next.java:83)
	at com.cloudbees.groovy.cps.Continuable$1.call(Continuable.java:174)
	at com.cloudbees.groovy.cps.Continuable$1.call(Continuable.java:163)
	at org.codehaus.groovy.runtime.GroovyCategorySupport$ThreadCategoryInfo.use(GroovyCategorySupport.java:122)
	at org.codehaus.groovy.runtime.GroovyCategorySupport.use(GroovyCategorySupport.java:261)
	at com.cloudbees.groovy.cps.Continuable.run0(Continuable.java:163)
	at org.jenkinsci.plugins.workflow.cps.SandboxContinuable.access$001(SandboxContinuable.java:19)
	at org.jenkinsci.plugins.workflow.cps.SandboxContinuable$1.call(SandboxContinuable.java:35)
	at org.jenkinsci.plugins.workflow.cps.SandboxContinuable$1.call(SandboxContinuable.java:32)
	at org.jenkinsci.plugins.scriptsecurity.sandbox.groovy.GroovySandbox.runInSandbox(GroovySandbox.java:108)
	at org.jenkinsci.plugins.workflow.cps.SandboxContinuable.run0(SandboxContinuable.java:32)
	at org.jenkinsci.plugins.workflow.cps.CpsThread.runNextChunk(CpsThread.java:174)
	at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.run(CpsThreadGroup.java:330)
	at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.access$100(CpsThreadGroup.java:82)
	at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup$2.call(CpsThreadGroup.java:242)
	at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup$2.call(CpsThreadGroup.java:230)
	at org.jenkinsci.plugins.workflow.cps.CpsVmExecutorService$2.call(CpsVmExecutorService.java:64)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at hudson.remoting.SingleLaneExecutorService$1.run(SingleLaneExecutorService.java:112)
	at jenkins.util.ContextResettingExecutorService$1.run(ContextResettingExecutorService.java:28)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	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)
Finished: FAILURE

And the slave has logs like this:

Log from the node 10.0.135.15:

Mar 01, 2018 9:21:54 PM hudson.util.ProcessTree getKillers
WARNING: Failed to obtain killers
java.io.IOException: Remote call on channel failed
        at hudson.remoting.Channel.call(Channel.java:916)
        at hudson.util.ProcessTree.getKillers(ProcessTree.java:159)
        at hudson.util.ProcessTree$OSProcess.killByKiller(ProcessTree.java:218)
        at hudson.util.ProcessTree$UnixProcess.kill(ProcessTree.java:660)
        at hudson.util.ProcessTree$UnixProcess.killRecursively(ProcessTree.java:668)
        at hudson.util.ProcessTree$UnixProcess.killRecursively(ProcessTree.java:667)
        at hudson.util.ProcessTree$UnixProcess.killRecursively(ProcessTree.java:667)
        at hudson.util.ProcessTree$Unix.killAll(ProcessTree.java:589)
        at hudson.Launcher$RemoteLauncher$KillTask.call(Launcher.java:1091)
        at hudson.Launcher$RemoteLauncher$KillTask.call(Launcher.java:1082)
        at hudson.remoting.UserRequest.perform(UserRequest.java:207)
        at hudson.remoting.UserRequest.perform(UserRequest.java:53)
        at hudson.remoting.Request$2.run(Request.java:358)
        at hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:72)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.NoClassDefFoundError: hudson/remoting/RemoteClassLoader$RemoteIClassLoader
        at hudson.remoting.RemoteClassLoader.export(RemoteClassLoader.java:744)
        at hudson.remoting.UserRequest.<init>(UserRequest.java:104)
        at hudson.remoting.Channel.call(Channel.java:906)
        ... 17 more

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Re: Node troubles

Ramanathan Muthaiah
Hello Sam,

Looks like something gone wrong here (in the pipeline script), extracted from the stacktrace in your post.

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
at com.cloudbees.groovy.cps.sandbox.SandboxInvoker.methodCall(SandboxInvoker.java:17)
	at WorkflowScript.run(WorkflowScript:343)
	at ___cps.transform___(Native Method)

/Ram

On Friday, March 2, 2018 at 11:26:46 PM UTC+5:30, Sam K wrote:
Hello

   I have about 20 nodes of various RHEL versions and one team's nodes always pose certain problems and cause their pipelines to fail.  For a while, I was able to get them to pass by 'bringing nodes online on-demand' because it would refresh the connection.  But lately that strategy has also failed.  The slaves had a higher version of Java than the master and after updating the master the problem seemed to go away only to come back again like this.  If I disconnect, offline the node and bring it back, the logs are clean. But once the pipeline starts running again, it fails.  Any help would be much appreciated.  Thanks. 


   I'm running Jenkins master version: 2.91.  

JDK version on master RHEL-7
[<a href="javascript:" target="_blank" gdf-obfuscated-mailto="cC2Rfx3NBAAJ" rel="nofollow" onmousedown="this.href=&#39;javascript:&#39;;return true;" onclick="this.href=&#39;javascript:&#39;;return true;">sup...@10.0.156.53 ~]$ java -version
openjdk version "1.8.0_141"
OpenJDK Runtime Environment (build 1.8.0_141-b16)
OpenJDK 64-Bit Server VM (build 25.141-b16, mixed mode)

Slave - 
RHEL 7.3
openjdk version "1.8.0_131"
OpenJDK Runtime Environment (build 1.8.0_131-b11)
OpenJDK 64-Bit Server VM (build 25.131-b11, mixed mode)

Pipeline fails with such errors:

[Pipeline] End of Pipeline
java.io.EOFException
	at java.io.ObjectInputStream$PeekInputStream.readFully(ObjectInputStream.java:2638)
	at java.io.ObjectInputStream$BlockDataInputStream.readShort(ObjectInputStream.java:3113)
	at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:853)
	at java.io.ObjectInputStream.<init>(ObjectInputStream.java:349)
	at hudson.remoting.ObjectInputStreamEx.<init>(ObjectInputStreamEx.java:48)
	at hudson.remoting.AbstractSynchronousByteArrayCommandTransport.read(AbstractSynchronousByteArrayCommandTransport.java:35)
	at hudson.remoting.SynchronousCommandTransport$ReaderThread.run(SynchronousCommandTransport.java:63)
Caused: java.io.IOException: Unexpected termination of the channel
	at hudson.remoting.SynchronousCommandTransport$ReaderThread.run(SynchronousCommandTransport.java:77)
Caused: hudson.remoting.ChannelClosedException: Remote call on 10.0.135.15 failed. The channel is closing down or has closed down
	at hudson.remoting.Channel.call(Channel.java:901)
	at hudson.FilePath.act(FilePath.java:986)
	at hudson.FilePath.act(FilePath.java:975)
	at hudson.FilePath.mkdirs(FilePath.java:1158)
	at org.jenkinsci.plugins.durabletask.FileMonitoringTask$FileMonitoringController.<init>(FileMonitoringTask.java:113)
	at org.jenkinsci.plugins.durabletask.BourneShellScript$ShellController.<init>(BourneShellScript.java:198)
	at org.jenkinsci.plugins.durabletask.BourneShellScript$ShellController.<init>(BourneShellScript.java:190)
	at org.jenkinsci.plugins.durabletask.BourneShellScript.launchWithCookie(BourneShellScript.java:111)
	at org.jenkinsci.plugins.durabletask.FileMonitoringTask.launch(FileMonitoringTask.java:64)
	at org.jenkinsci.plugins.workflow.steps.durable_task.DurableTaskStep$Execution.start(DurableTaskStep.java:177)
	at org.jenkinsci.plugins.workflow.cps.DSL.invokeStep(DSL.java:224)
	at org.jenkinsci.plugins.workflow.cps.DSL.invokeMethod(DSL.java:150)
	at org.jenkinsci.plugins.workflow.cps.CpsScript.invokeMethod(CpsScript.java:108)
	at sun.reflect.GeneratedMethodAccessor5286.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:93)
	at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:325)
	at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1213)
	at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1022)
	at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.call(PogoMetaClassSite.java:42)
	at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48)
	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:113)
	at org.kohsuke.groovy.sandbox.impl.Checker$1.call(Checker.java:155)
	at org.kohsuke.groovy.sandbox.GroovyInterceptor.onMethodCall(GroovyInterceptor.java:23)
	at org.jenkinsci.plugins.scriptsecurity.sandbox.groovy.SandboxInterceptor.onMethodCall(SandboxInterceptor.java:133)
	at org.kohsuke.groovy.sandbox.impl.Checker$1.call(Checker.java:153)
	at org.kohsuke.groovy.sandbox.impl.Checker.checkedCall(Checker.java:157)
	at org.kohsuke.groovy.sandbox.impl.Checker.checkedCall(Checker.java:127)
	at org.kohsuke.groovy.sandbox.impl.Checker.checkedCall(Checker.java:127)
	at com.cloudbees.groovy.cps.sandbox.SandboxInvoker.methodCall(SandboxInvoker.java:17)
Caused: java.io.IOException: remote file operation failed: /mnt/grandprix/homes/axsbuild/workspace/Sensor/Sensor_4.x_Groovy at hudson.remoting.Channel@3735998a:10.0.135.15
	at hudson.FilePath.act(FilePath.java:993)
	at hudson.FilePath.act(FilePath.java:975)
	at hudson.FilePath.mkdirs(FilePath.java:1158)
	at org.jenkinsci.plugins.durabletask.FileMonitoringTask$FileMonitoringController.<init>(FileMonitoringTask.java:113)
	at org.jenkinsci.plugins.durabletask.BourneShellScript$ShellController.<init>(BourneShellScript.java:198)
	at org.jenkinsci.plugins.durabletask.BourneShellScript$ShellController.<init>(BourneShellScript.java:190)
	at org.jenkinsci.plugins.durabletask.BourneShellScript.launchWithCookie(BourneShellScript.java:111)
	at org.jenkinsci.plugins.durabletask.FileMonitoringTask.launch(FileMonitoringTask.java:64)
	at org.jenkinsci.plugins.workflow.steps.durable_task.DurableTaskStep$Execution.start(DurableTaskStep.java:177)
	at org.jenkinsci.plugins.workflow.cps.DSL.invokeStep(DSL.java:224)
	at org.jenkinsci.plugins.workflow.cps.DSL.invokeMethod(DSL.java:150)
	at org.jenkinsci.plugins.workflow.cps.CpsScript.invokeMethod(CpsScript.java:108)
	at sun.reflect.GeneratedMethodAccessor5286.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:93)
	at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:325)
	at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1213)
	at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1022)
	at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.call(PogoMetaClassSite.java:42)
	at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48)
	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:113)
	at org.kohsuke.groovy.sandbox.impl.Checker$1.call(Checker.java:155)
	at org.kohsuke.groovy.sandbox.GroovyInterceptor.onMethodCall(GroovyInterceptor.java:23)
	at org.jenkinsci.plugins.scriptsecurity.sandbox.groovy.SandboxInterceptor.onMethodCall(SandboxInterceptor.java:133)
	at org.kohsuke.groovy.sandbox.impl.Checker$1.call(Checker.java:153)
	at org.kohsuke.groovy.sandbox.impl.Checker.checkedCall(Checker.java:157)
	at org.kohsuke.groovy.sandbox.impl.Checker.checkedCall(Checker.java:127)
	at org.kohsuke.groovy.sandbox.impl.Checker.checkedCall(Checker.java:127)
	at com.cloudbees.groovy.cps.sandbox.SandboxInvoker.methodCall(SandboxInvoker.java:17)
	at WorkflowScript.run(WorkflowScript:343)
	at ___cps.transform___(Native Method)
	at com.cloudbees.groovy.cps.impl.ContinuationGroup.methodCall(ContinuationGroup.java:57)
	at com.cloudbees.groovy.cps.impl.FunctionCallBlock$ContinuationImpl.dispatchOrArg(FunctionCallBlock.java:109)
	at com.cloudbees.groovy.cps.impl.FunctionCallBlock$ContinuationImpl.fixArg(FunctionCallBlock.java:82)
	at sun.reflect.GeneratedMethodAccessor196.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at com.cloudbees.groovy.cps.impl.ContinuationPtr$ContinuationImpl.receive(ContinuationPtr.java:72)
	at com.cloudbees.groovy.cps.impl.ContinuationGroup.methodCall(ContinuationGroup.java:60)
	at com.cloudbees.groovy.cps.impl.FunctionCallBlock$ContinuationImpl.dispatchOrArg(FunctionCallBlock.java:109)
	at com.cloudbees.groovy.cps.impl.FunctionCallBlock$ContinuationImpl.fixArg(FunctionCallBlock.java:82)
	at sun.reflect.GeneratedMethodAccessor196.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at com.cloudbees.groovy.cps.impl.ContinuationPtr$ContinuationImpl.receive(ContinuationPtr.java:72)
	at com.cloudbees.groovy.cps.impl.LocalVariableBlock$LocalVariable.get(LocalVariableBlock.java:39)
	at com.cloudbees.groovy.cps.LValueBlock$GetAdapter.receive(LValueBlock.java:30)
	at com.cloudbees.groovy.cps.impl.LocalVariableBlock.evalLValue(LocalVariableBlock.java:28)
	at com.cloudbees.groovy.cps.LValueBlock$BlockImpl.eval(LValueBlock.java:55)
	at com.cloudbees.groovy.cps.LValueBlock.eval(LValueBlock.java:16)
	at com.cloudbees.groovy.cps.Next.step(Next.java:83)
	at com.cloudbees.groovy.cps.Continuable$1.call(Continuable.java:174)
	at com.cloudbees.groovy.cps.Continuable$1.call(Continuable.java:163)
	at org.codehaus.groovy.runtime.GroovyCategorySupport$ThreadCategoryInfo.use(GroovyCategorySupport.java:122)
	at org.codehaus.groovy.runtime.GroovyCategorySupport.use(GroovyCategorySupport.java:261)
	at com.cloudbees.groovy.cps.Continuable.run0(Continuable.java:163)
	at org.jenkinsci.plugins.workflow.cps.SandboxContinuable.access$001(SandboxContinuable.java:19)
	at org.jenkinsci.plugins.workflow.cps.SandboxContinuable$1.call(SandboxContinuable.java:35)
	at org.jenkinsci.plugins.workflow.cps.SandboxContinuable$1.call(SandboxContinuable.java:32)
	at org.jenkinsci.plugins.scriptsecurity.sandbox.groovy.GroovySandbox.runInSandbox(GroovySandbox.java:108)
	at org.jenkinsci.plugins.workflow.cps.SandboxContinuable.run0(SandboxContinuable.java:32)
	at org.jenkinsci.plugins.workflow.cps.CpsThread.runNextChunk(CpsThread.java:174)
	at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.run(CpsThreadGroup.java:330)
	at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.access$100(CpsThreadGroup.java:82)
	at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup$2.call(CpsThreadGroup.java:242)
	at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup$2.call(CpsThreadGroup.java:230)
	at org.jenkinsci.plugins.workflow.cps.CpsVmExecutorService$2.call(CpsVmExecutorService.java:64)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at hudson.remoting.SingleLaneExecutorService$1.run(SingleLaneExecutorService.java:112)
	at jenkins.util.ContextResettingExecutorService$1.run(ContextResettingExecutorService.java:28)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	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)
Finished: FAILURE

And the slave has logs like this:

Log from the node <a href="http://10.0.135.15" target="_blank" rel="nofollow" onmousedown="this.href=&#39;http://www.google.com/url?q\x3dhttp%3A%2F%2F10.0.135.15\x26sa\x3dD\x26sntz\x3d1\x26usg\x3dAFQjCNHa6bxs5mqOkZ8wC6AJywew9pavog&#39;;return true;" onclick="this.href=&#39;http://www.google.com/url?q\x3dhttp%3A%2F%2F10.0.135.15\x26sa\x3dD\x26sntz\x3d1\x26usg\x3dAFQjCNHa6bxs5mqOkZ8wC6AJywew9pavog&#39;;return true;">10.0.135.15:

Mar 01, 2018 9:21:54 PM hudson.util.ProcessTree getKillers
WARNING: Failed to obtain killers
java.io.IOException: Remote call on channel failed
        at hudson.remoting.Channel.call(Channel.java:916)
        at hudson.util.ProcessTree.getKillers(ProcessTree.java:159)
        at hudson.util.ProcessTree$OSProcess.killByKiller(ProcessTree.java:218)
        at hudson.util.ProcessTree$UnixProcess.kill(ProcessTree.java:660)
        at hudson.util.ProcessTree$UnixProcess.killRecursively(ProcessTree.java:668)
        at hudson.util.ProcessTree$UnixProcess.killRecursively(ProcessTree.java:667)
        at hudson.util.ProcessTree$UnixProcess.killRecursively(ProcessTree.java:667)
        at hudson.util.ProcessTree$Unix.killAll(ProcessTree.java:589)
        at hudson.Launcher$RemoteLauncher$KillTask.call(Launcher.java:1091)
        at hudson.Launcher$RemoteLauncher$KillTask.call(Launcher.java:1082)
        at hudson.remoting.UserRequest.perform(UserRequest.java:207)
        at hudson.remoting.UserRequest.perform(UserRequest.java:53)
        at hudson.remoting.Request$2.run(Request.java:358)
        at hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:72)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.NoClassDefFoundError: hudson/remoting/RemoteClassLoader$RemoteIClassLoader
        at hudson.remoting.RemoteClassLoader.export(RemoteClassLoader.java:744)
        at hudson.remoting.UserRequest.<init>(UserRequest.java:104)
        at hudson.remoting.Channel.call(Channel.java:906)
        ... 17 more

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Re: Node troubles

sreeramk
Hi

  Thanks For the reply.  But it does not explain why it works most of the times and why it stops working all of a sudden.  For example since I posted this, the server has been rebooted and it has been running fine for a week now.  

thanks


On Saturday, March 3, 2018 at 10:23:51 PM UTC-8, Ramanathan Muthaiah wrote:
Hello Sam,

Looks like something gone wrong here (in the pipeline script), extracted from the stacktrace in your post.

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
at com.cloudbees.groovy.cps.sandbox.SandboxInvoker.methodCall(SandboxInvoker.java:17)
	at WorkflowScript.run(WorkflowScript:343)
	at ___cps.transform___(Native Method)

/Ram

On Friday, March 2, 2018 at 11:26:46 PM UTC+5:30, Sam K wrote:
Hello

   I have about 20 nodes of various RHEL versions and one team's nodes always pose certain problems and cause their pipelines to fail.  For a while, I was able to get them to pass by 'bringing nodes online on-demand' because it would refresh the connection.  But lately that strategy has also failed.  The slaves had a higher version of Java than the master and after updating the master the problem seemed to go away only to come back again like this.  If I disconnect, offline the node and bring it back, the logs are clean. But once the pipeline starts running again, it fails.  Any help would be much appreciated.  Thanks. 


   I'm running Jenkins master version: 2.91.  

JDK version on master RHEL-7
[sup...@10.0.156.53 ~]$ java -version
openjdk version "1.8.0_141"
OpenJDK Runtime Environment (build 1.8.0_141-b16)
OpenJDK 64-Bit Server VM (build 25.141-b16, mixed mode)

Slave - 
RHEL 7.3
openjdk version "1.8.0_131"
OpenJDK Runtime Environment (build 1.8.0_131-b11)
OpenJDK 64-Bit Server VM (build 25.131-b11, mixed mode)

Pipeline fails with such errors:

[Pipeline] End of Pipeline
java.io.EOFException
	at java.io.ObjectInputStream$PeekInputStream.readFully(ObjectInputStream.java:2638)
	at java.io.ObjectInputStream$BlockDataInputStream.readShort(ObjectInputStream.java:3113)
	at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:853)
	at java.io.ObjectInputStream.<init>(ObjectInputStream.java:349)
	at hudson.remoting.ObjectInputStreamEx.<init>(ObjectInputStreamEx.java:48)
	at hudson.remoting.AbstractSynchronousByteArrayCommandTransport.read(AbstractSynchronousByteArrayCommandTransport.java:35)
	at hudson.remoting.SynchronousCommandTransport$ReaderThread.run(SynchronousCommandTransport.java:63)
Caused: java.io.IOException: Unexpected termination of the channel
	at hudson.remoting.SynchronousCommandTransport$ReaderThread.run(SynchronousCommandTransport.java:77)
Caused: hudson.remoting.ChannelClosedException: Remote call on 10.0.135.15 failed. The channel is closing down or has closed down
	at hudson.remoting.Channel.call(Channel.java:901)
	at hudson.FilePath.act(FilePath.java:986)
	at hudson.FilePath.act(FilePath.java:975)
	at hudson.FilePath.mkdirs(FilePath.java:1158)
	at org.jenkinsci.plugins.durabletask.FileMonitoringTask$FileMonitoringController.<init>(FileMonitoringTask.java:113)
	at org.jenkinsci.plugins.durabletask.BourneShellScript$ShellController.<init>(BourneShellScript.java:198)
	at org.jenkinsci.plugins.durabletask.BourneShellScript$ShellController.<init>(BourneShellScript.java:190)
	at org.jenkinsci.plugins.durabletask.BourneShellScript.launchWithCookie(BourneShellScript.java:111)
	at org.jenkinsci.plugins.durabletask.FileMonitoringTask.launch(FileMonitoringTask.java:64)
	at org.jenkinsci.plugins.workflow.steps.durable_task.DurableTaskStep$Execution.start(DurableTaskStep.java:177)
	at org.jenkinsci.plugins.workflow.cps.DSL.invokeStep(DSL.java:224)
	at org.jenkinsci.plugins.workflow.cps.DSL.invokeMethod(DSL.java:150)
	at org.jenkinsci.plugins.workflow.cps.CpsScript.invokeMethod(CpsScript.java:108)
	at sun.reflect.GeneratedMethodAccessor5286.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:93)
	at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:325)
	at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1213)
	at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1022)
	at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.call(PogoMetaClassSite.java:42)
	at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48)
	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:113)
	at org.kohsuke.groovy.sandbox.impl.Checker$1.call(Checker.java:155)
	at org.kohsuke.groovy.sandbox.GroovyInterceptor.onMethodCall(GroovyInterceptor.java:23)
	at org.jenkinsci.plugins.scriptsecurity.sandbox.groovy.SandboxInterceptor.onMethodCall(SandboxInterceptor.java:133)
	at org.kohsuke.groovy.sandbox.impl.Checker$1.call(Checker.java:153)
	at org.kohsuke.groovy.sandbox.impl.Checker.checkedCall(Checker.java:157)
	at org.kohsuke.groovy.sandbox.impl.Checker.checkedCall(Checker.java:127)
	at org.kohsuke.groovy.sandbox.impl.Checker.checkedCall(Checker.java:127)
	at com.cloudbees.groovy.cps.sandbox.SandboxInvoker.methodCall(SandboxInvoker.java:17)
Caused: java.io.IOException: remote file operation failed: /mnt/grandprix/homes/axsbuild/workspace/Sensor/Sensor_4.x_Groovy at hudson.remoting.Channel@3735998a:10.0.135.15
	at hudson.FilePath.act(FilePath.java:993)
	at hudson.FilePath.act(FilePath.java:975)
	at hudson.FilePath.mkdirs(FilePath.java:1158)
	at org.jenkinsci.plugins.durabletask.FileMonitoringTask$FileMonitoringController.<init>(FileMonitoringTask.java:113)
	at org.jenkinsci.plugins.durabletask.BourneShellScript$ShellController.<init>(BourneShellScript.java:198)
	at org.jenkinsci.plugins.durabletask.BourneShellScript$ShellController.<init>(BourneShellScript.java:190)
	at org.jenkinsci.plugins.durabletask.BourneShellScript.launchWithCookie(BourneShellScript.java:111)
	at org.jenkinsci.plugins.durabletask.FileMonitoringTask.launch(FileMonitoringTask.java:64)
	at org.jenkinsci.plugins.workflow.steps.durable_task.DurableTaskStep$Execution.start(DurableTaskStep.java:177)
	at org.jenkinsci.plugins.workflow.cps.DSL.invokeStep(DSL.java:224)
	at org.jenkinsci.plugins.workflow.cps.DSL.invokeMethod(DSL.java:150)
	at org.jenkinsci.plugins.workflow.cps.CpsScript.invokeMethod(CpsScript.java:108)
	at sun.reflect.GeneratedMethodAccessor5286.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:93)
	at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:325)
	at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1213)
	at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1022)
	at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.call(PogoMetaClassSite.java:42)
	at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48)
	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:113)
	at org.kohsuke.groovy.sandbox.impl.Checker$1.call(Checker.java:155)
	at org.kohsuke.groovy.sandbox.GroovyInterceptor.onMethodCall(GroovyInterceptor.java:23)
	at org.jenkinsci.plugins.scriptsecurity.sandbox.groovy.SandboxInterceptor.onMethodCall(SandboxInterceptor.java:133)
	at org.kohsuke.groovy.sandbox.impl.Checker$1.call(Checker.java:153)
	at org.kohsuke.groovy.sandbox.impl.Checker.checkedCall(Checker.java:157)
	at org.kohsuke.groovy.sandbox.impl.Checker.checkedCall(Checker.java:127)
	at org.kohsuke.groovy.sandbox.impl.Checker.checkedCall(Checker.java:127)
	at com.cloudbees.groovy.cps.sandbox.SandboxInvoker.methodCall(SandboxInvoker.java:17)
	at WorkflowScript.run(WorkflowScript:343)
	at ___cps.transform___(Native Method)
	at com.cloudbees.groovy.cps.impl.ContinuationGroup.methodCall(ContinuationGroup.java:57)
	at com.cloudbees.groovy.cps.impl.FunctionCallBlock$ContinuationImpl.dispatchOrArg(FunctionCallBlock.java:109)
	at com.cloudbees.groovy.cps.impl.FunctionCallBlock$ContinuationImpl.fixArg(FunctionCallBlock.java:82)
	at sun.reflect.GeneratedMethodAccessor196.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at com.cloudbees.groovy.cps.impl.ContinuationPtr$ContinuationImpl.receive(ContinuationPtr.java:72)
	at com.cloudbees.groovy.cps.impl.ContinuationGroup.methodCall(ContinuationGroup.java:60)
	at com.cloudbees.groovy.cps.impl.FunctionCallBlock$ContinuationImpl.dispatchOrArg(FunctionCallBlock.java:109)
	at com.cloudbees.groovy.cps.impl.FunctionCallBlock$ContinuationImpl.fixArg(FunctionCallBlock.java:82)
	at sun.reflect.GeneratedMethodAccessor196.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at com.cloudbees.groovy.cps.impl.ContinuationPtr$ContinuationImpl.receive(ContinuationPtr.java:72)
	at com.cloudbees.groovy.cps.impl.LocalVariableBlock$LocalVariable.get(LocalVariableBlock.java:39)
	at com.cloudbees.groovy.cps.LValueBlock$GetAdapter.receive(LValueBlock.java:30)
	at com.cloudbees.groovy.cps.impl.LocalVariableBlock.evalLValue(LocalVariableBlock.java:28)
	at com.cloudbees.groovy.cps.LValueBlock$BlockImpl.eval(LValueBlock.java:55)
	at com.cloudbees.groovy.cps.LValueBlock.eval(LValueBlock.java:16)
	at com.cloudbees.groovy.cps.Next.step(Next.java:83)
	at com.cloudbees.groovy.cps.Continuable$1.call(Continuable.java:174)
	at com.cloudbees.groovy.cps.Continuable$1.call(Continuable.java:163)
	at org.codehaus.groovy.runtime.GroovyCategorySupport$ThreadCategoryInfo.use(GroovyCategorySupport.java:122)
	at org.codehaus.groovy.runtime.GroovyCategorySupport.use(GroovyCategorySupport.java:261)
	at com.cloudbees.groovy.cps.Continuable.run0(Continuable.java:163)
	at org.jenkinsci.plugins.workflow.cps.SandboxContinuable.access$001(SandboxContinuable.java:19)
	at org.jenkinsci.plugins.workflow.cps.SandboxContinuable$1.call(SandboxContinuable.java:35)
	at org.jenkinsci.plugins.workflow.cps.SandboxContinuable$1.call(SandboxContinuable.java:32)
	at org.jenkinsci.plugins.scriptsecurity.sandbox.groovy.GroovySandbox.runInSandbox(GroovySandbox.java:108)
	at org.jenkinsci.plugins.workflow.cps.SandboxContinuable.run0(SandboxContinuable.java:32)
	at org.jenkinsci.plugins.workflow.cps.CpsThread.runNextChunk(CpsThread.java:174)
	at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.run(CpsThreadGroup.java:330)
	at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.access$100(CpsThreadGroup.java:82)
	at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup$2.call(CpsThreadGroup.java:242)
	at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup$2.call(CpsThreadGroup.java:230)
	at org.jenkinsci.plugins.workflow.cps.CpsVmExecutorService$2.call(CpsVmExecutorService.java:64)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at hudson.remoting.SingleLaneExecutorService$1.run(SingleLaneExecutorService.java:112)
	at jenkins.util.ContextResettingExecutorService$1.run(ContextResettingExecutorService.java:28)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	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)
Finished: FAILURE

And the slave has logs like this:

Log from the node <a href="http://10.0.135.15" rel="nofollow" target="_blank" onmousedown="this.href=&#39;http://www.google.com/url?q\x3dhttp%3A%2F%2F10.0.135.15\x26sa\x3dD\x26sntz\x3d1\x26usg\x3dAFQjCNHa6bxs5mqOkZ8wC6AJywew9pavog&#39;;return true;" onclick="this.href=&#39;http://www.google.com/url?q\x3dhttp%3A%2F%2F10.0.135.15\x26sa\x3dD\x26sntz\x3d1\x26usg\x3dAFQjCNHa6bxs5mqOkZ8wC6AJywew9pavog&#39;;return true;">10.0.135.15:

Mar 01, 2018 9:21:54 PM hudson.util.ProcessTree getKillers
WARNING: Failed to obtain killers
java.io.IOException: Remote call on channel failed
        at hudson.remoting.Channel.call(Channel.java:916)
        at hudson.util.ProcessTree.getKillers(ProcessTree.java:159)
        at hudson.util.ProcessTree$OSProcess.killByKiller(ProcessTree.java:218)
        at hudson.util.ProcessTree$UnixProcess.kill(ProcessTree.java:660)
        at hudson.util.ProcessTree$UnixProcess.killRecursively(ProcessTree.java:668)
        at hudson.util.ProcessTree$UnixProcess.killRecursively(ProcessTree.java:667)
        at hudson.util.ProcessTree$UnixProcess.killRecursively(ProcessTree.java:667)
        at hudson.util.ProcessTree$Unix.killAll(ProcessTree.java:589)
        at hudson.Launcher$RemoteLauncher$KillTask.call(Launcher.java:1091)
        at hudson.Launcher$RemoteLauncher$KillTask.call(Launcher.java:1082)
        at hudson.remoting.UserRequest.perform(UserRequest.java:207)
        at hudson.remoting.UserRequest.perform(UserRequest.java:53)
        at hudson.remoting.Request$2.run(Request.java:358)
        at hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:72)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.NoClassDefFoundError: hudson/remoting/RemoteClassLoader$RemoteIClassLoader
        at hudson.remoting.RemoteClassLoader.export(RemoteClassLoader.java:744)
        at hudson.remoting.UserRequest.<init>(UserRequest.java:104)
        at hudson.remoting.Channel.call(Channel.java:906)
        ... 17 more

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