Thread blocked under high load at weblogic.cache.CacheSystem.waitOnLock() (Doc ID 1329069.1)

Last updated on MARCH 29, 2017

Applies to:

Oracle Weblogic Server - Version 10.0 and later
Information in this document applies to any platform.

Symptoms

When running a web application (with JSP's) using <wl:cache> tag in WLS 10.3.0, during heavy load,
you will find that all Execute threads are blocked on 'weblogic.cache.webapp.CacheSystem', thereby leading to stuck thread trace as below.

"[STUCK] ExecuteThread: '79' for queue: 'weblogic.kernel.Default (self-tuning)'" daemon prio=3 tid=0x0000000105ab8800 nid=0x86 in Object.wait() [0xfffffffe2f5f7000]
java.lang.Thread.State: TIMED_WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
at weblogic.cache.webapp.CacheSystem.waitOnLock(CacheSystem.java:181)
- locked <0xfffffffe92fa1a80> (a java.lang.Object)
at weblogic.cache.webapp.CacheSystem.getCache(CacheSystem.java:444)
at weblogic.cache.tag.CacheTag.doStartKeyedCache(CacheTag.java:429)
at weblogic.cache.tag.CacheTag.doStartTag(CacheTag.java:333)
at jsp_servlet._pages._efunddatashow.__efcommonfund._jspService(__efcommonfund.java:1870)

"[STUCK] ExecuteThread: '23' for queue: 'weblogic.kernel.Default (self-tuning)'" daemon prio=3 tid=0x0000000105dca800 nid=0x4e in Object.wait() [0xfffffffe3d5f7000]
java.lang.Thread.State: TIMED_WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
at weblogic.cache.webapp.CacheSystem.waitOnLock(CacheSystem.java:181)
- locked <0xfffffffe92fa1a80> (a java.lang.Object)
at weblogic.cache.webapp.CacheSystem.getCache(CacheSystem.java:444)
at weblogic.cache.tag.CacheTag.doStartKeyedCache(CacheTag.java:429)
at weblogic.cache.tag.CacheTag.doStartTag(CacheTag.java:333)
at jsp_servlet._pages._efunddatashow.__efcommonfund._jspService(__efcommonfund.java:1870)

Cause

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