[JIRA] (JENKINS-41648) Jenkins hangs during build; webpage unresponsive

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Giovanni Porta created an issue   Jenkins / JENKINS-41648 Jenkins hangs during build; webpage unresponsive Issue Type: Bug Assignee: Unassigned Components: core Created: 2017/Feb/02 5:10 AM Environment: OS: Ubuntu 16.04.1 x64 - deployed on DigitalOcean Jenkins: 2.32.2 Java: openjdk-8 (8u121) All the recommend plugins are installed, plus GitHub. Priority: Blocker Reporter: Giovanni Porta My project is very small and building it only involves running a shell script with one argument, in which it just calls a jar file that initiates the build. For some reason, building goes fine and I'm able to watch things work on the console output, then all of a sudden the console output stops and the Jenkins page is unresponsive. I have to restart Jenkins to get the webpage back, and the build ends up not even being there. When I go to the build's output directory, I can see it never finished since a core .json file is missing. Jenkins doesn't crash if the build itself has an error near the beginning and doesn't proceed. It seems to only happen when the build is going on for a long period of time, and it occurs at the process where the script is downloading the libraries. For the record, this is my first time using Jenkins. service jenkins status returns the following: jenkins.service - LSB: Start Jenkins at boot time Loaded: loaded (/etc/init.d/jenkins; bad; vendor preset: enabled) Active: active (exited) since Thu 2017-02-02 04:47:18 UTC; 10min ago Docs: man:systemd-sysv-generator(8) Process: 7262 ExecStop=/etc/init.d/jenkins stop (code=exited, status=0/SUCCESS) Process: 7280 ExecStart=/etc/init.d/jenkins start (code=exited, status=0/SUCCESS) jstack returns the following: Error attaching to process: sun.jvm.hotspot.debugger.DebuggerException: cannot open binary file sun.jvm.hotspot.debugger.DebuggerException: sun.jvm.hotspot.debugger.DebuggerException: cannot open binary file at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$LinuxDebuggerLocalWorkerThread.execute(LinuxDebuggerLocal.java:163) at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.attach(LinuxDebuggerLocal.java:278) at sun.jvm.hotspot.HotSpotAgent.attachDebugger(HotSpotAgent.java:671) at sun.jvm.hotspot.HotSpotAgent.setupDebuggerLinux(HotSpotAgent.java:611) at sun.jvm.hotspot.HotSpotAgent.setupDebugger(HotSpotAgent.java:337) at sun.jvm.hotspot.HotSpotAgent.go(HotSpotAgent.java:304) at sun.jvm.hotspot.HotSpotAgent.attach(HotSpotAgent.java:140) at sun.jvm.hotspot.tools.Tool.start(Tool.java:185) at sun.jvm.hotspot.tools.Tool.execute(Tool.java:118) at sun.jvm.hotspot.tools.JStack.main(JStack.java:92) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at sun.tools.jstack.JStack.runJStackTool(JStack.java:140) at sun.tools.jstack.JStack.main(JStack.java:106) Caused by: sun.jvm.hotspot.debugger.DebuggerException: cannot open binary file at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.attach0(Native Method) at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.access$100(LinuxDebuggerLocal.java:62) at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$1AttachTask.doit(LinuxDebuggerLocal.java:269) at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$LinuxDebuggerLocalWorkerThread.run(LinuxDebuggerLocal.java:138) Add Comment   This message was sent by Atlassian JIRA (v7.1.7#71011-sha1:2526d7c) -- You received this message because you are subscribed to the Google Groups "Jenkins Issues" group. To unsubscribe from this group and stop receiving emails from it, send an email to jenkinsci-issues+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.