Script console might be producing performance issues

Issue

Your instance is running into performance isssues and Handling POST /script appears in the slow-requests directory inside the support bundle.

Handling POST /script from X.X.233.86 : qtp2085857771-25823200 / waiting for OperationsCenter2 connection from X.X.3.131/X.X.6.135:41400 id=45711894" Id=25823200 TIMED_WAITING on hudson.remoting.UserRequest@6a31aa89
 	at java.lang.Object.wait(Native Method)
 	-  waiting on hudson.remoting.UserRequest@6a31aa89
 	at hudson.remoting.Request.call(Request.java:177)
 	at hudson.remoting.Channel.call(Channel.java:954)
 	at hudson.remoting.VirtualChannel$call$6.call(Unknown Source)
 	at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48)
 	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:113)
 	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:125)
 	at Script1$_run_closure2.doCall(Script1.groovy:171)
 	...

 11703msec elapsed in Handling POST /script from X.X.199.86 : qtp2085857771-25823200 / waiting for OperationsCenter2 connection from X.X.3.131/X.X.6.130:41400 id=45711894
     java.lang.Object.wait(Native Method)
     hudson.remoting.Request.call(Request.java:177)
     hudson.remoting.Channel.call(Channel.java:954)
     hudson.remoting.VirtualChannel$call$6.call(Unknown Source)
     org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48)
     org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:113)
     org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:125)
     Script1$_run_closure2.doCall(Script1.groovy:171)
     sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
     sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
     java.lang.reflect.Method.invoke(Method.java:498)

Environment

CloudBees CI (CloudBees Core) on modern cloud platforms - Operations Center
CloudBees CI (CloudBees Core) on modern cloud platforms - Managed controller
CloudBees CI (CloudBees Core) on traditional platforms - Operations Center
CloudBees CI (CloudBees Core) on traditional platforms - Client controller
Jenkins LTS

Resolution

The performance issue you are facing might be produced by an administrator executing a Groovy script under Manage Jenkins -> Script Console. Before moving into a different hypothesis, it is suggested capturing thread dumps next time the issue is exposed and ensure that there is not any /script request into the threads. You can execute thread dumps by following the KB article Required Data: Jenkins: High CPU On Linux - specifically through the script collectPerformanceData.sh.

If you would like to disable the access to $JENKINS_URL/script then you could use the CloudBees Request Filter Plugin.

How Do I Use The CloudBees Request Filter Plugin?

This article is part of our Knowledge Base and is provided for guidance-based purposes only. The solutions or workarounds described here are not officially supported by CloudBees and may not be applicable in all environments. Use at your own discretion, and test changes in a safe environment before applying them to production systems.