Issue
Jenkins experiences a performance degradation or hangs.
Analysis of the thread-dump.txt
or slow request files from a Support Bundle, or full thread dumps generated by collectPerformanceData.sh
(Linux), or getThreadDumps.bat
(Windows) shows one or more threads with a thread stack in socketRead() to an external resource as shown in the following snippets:
16019msec elapsed in Handling GET /jenkins/job/xxxxxxx/xxxxx/ from xx.xxx.xx.xxx
java.net.SocketInputStream.socketRead0(Native Method)
java.net.SocketInputStream.socketRead(SocketInputStream.java:116)
java.net.SocketInputStream.read(SocketInputStream.java:171)
java.net.SocketInputStream.read(SocketInputStream.java:141)
"Connecting to ldap://xx.xxx.xxx:xxxx/ : Handling GET / from xxx.xx.xx.xxx"
java.lang.Thread.State: RUNNABLE
at java.net.SocketInputStream.socketRead0(Native Method)
at java.net.SocketInputStream.socketRead(SocketInputStream.java:116)
at java.net.SocketInputStream.read(SocketInputStream.java:170)
at java.net.SocketInputStream.read(SocketInputStream.java:141)
Resolution
The issue is not caused by Jenkins. The specific external resource that Jenkins is expecting a response from should be investigated to confirm that it responds to the request in an acceptable amount of time.
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