Hello,
We are facing two issue with our Jenkins setups
1> Jenkins memory usage is very hight.
We are running quite few jobs around 15-20 and observing heap memory usage increase gradually and reach upto 4 to 4.5 GB and. is this generic behavior or we have to upgrade to new version of Jenkins LTS.
2> we are facing below pasted error with downstream jobs
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FATAL: Remote call on Rhel6.3-2014-supbl603 failed
java.io.IOException: Remote call on Rhel6.3-2014-supbl603 failed
at hudson.remoting.Channel.call(Channel.java:760)
at hudson.Launcher$RemoteLauncher.kill(Launcher.java:941)
at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:556)
at hudson.model.Run.execute(Run.java:1745)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
at hudson.model.ResourceController.execute(ResourceController.java:89)
at hudson.model.Executor.run(Executor.java:240)
Caused by: java.lang.ClassFormatError: Failed to load javax.servlet.ServletException
at hudson.remoting.RemoteClassLoader.loadClassFile(RemoteClassLoader.java:325)
at hudson.remoting.RemoteClassLoader.findClass(RemoteClassLoader.java:237)
at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
at hudson.util.ProcessTree.getKillers(ProcessTree.java:151)
at hudson.util.ProcessTree$OSProcess.killByKiller(ProcessTree.java:212)
at hudson.util.ProcessTree$UnixProcess.kill(ProcessTree.java:557)
at hudson.util.ProcessTree$UnixProcess.killRecursively(ProcessTree.java:564)
at hudson.util.ProcessTree$Unix.killAll(ProcessTree.java:488)
at hudson.Launcher$RemoteLauncher$KillTask.call(Launcher.java:953)
at hudson.Launcher$RemoteLauncher$KillTask.call(Launcher.java:944)
at hudson.remoting.UserRequest.perform(UserRequest.java:121)
at hudson.remoting.UserRequest.perform(UserRequest.java:49)
at hudson.remoting.Request$2.run(Request.java:324)
at hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:68)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
at java.util.concurrent.FutureTask.run(FutureTask.java:166)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:679)
at ......remote call to Rhel6.3-2014-supbl603(Native Method)
at hudson.remoting.Channel.attachCallSiteStackTrace(Channel.java:1356)
at hudson.remoting.UserResponse.retrieve(UserRequest.java:221)
at hudson.remoting.Channel.call(Channel.java:752)
... 6 more
Caused by: java.lang.UnsupportedClassVersionError: javax/servlet/ServletException : Unsupported major.minor version 51.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:634)
at java.lang.ClassLoader.defineClass(ClassLoader.java:480)
at hudson.remoting.RemoteClassLoader.loadClassFile(RemoteClassLoader.java:323)
at hudson.remoting.RemoteClassLoader.findClass(RemoteClassLoader.java:237)
at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
at hudson.util.ProcessTree.getKillers(ProcessTree.java:151)
at hudson.util.ProcessTree$OSProcess.killByKiller(ProcessTree.java:212)
at hudson.util.ProcessTree$UnixProcess.kill(ProcessTree.java:557)
at hudson.util.ProcessTree$UnixProcess.killRecursively(ProcessTree.java:564)
at hudson.util.ProcessTree$Unix.killAll(ProcessTree.java:488)
at hudson.Launcher$RemoteLauncher$KillTask.call(Launcher.java:953)
at hudson.Launcher$RemoteLauncher$KillTask.call(Launcher.java:944)
at hudson.remoting.UserRequest.perform(UserRequest.java:121)
at hudson.remoting.UserRequest.perform(UserRequest.java:49)
at hudson.remoting.Request$2.run(Request.java:324)
at hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:68)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
at java.util.concurrent.FutureTask.run(FutureTask.java:166)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:679)
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Please do let-us know if more symptom is required