SA-5713

Summary

Stale Thread error in logs

Error Messages

[12/10/14 9:53:00:314 CST] 0000001c SystemOut     O 2014-12-10 09:53:00,313 [j2ee14_ws,maxpri=10]] [  STANDARD] [                    ] (          mgmt.base.ThreadData) ERROR   - Trying to use a destroyed thread
com.pega.pegarules.pub.context.StaleThreadError: Thread has been destroyed
    at com.pega.pegarules.session.internal.mgmt.base.ThreadData.validateUse(ThreadData.java:551)
    at com.pega.pegarules.session.internal.mgmt.PRThreadImpl.validateUse(PRThreadImpl.java:328)
    at com.pega.pegarules.session.internal.mgmt.PRThreadImpl.getThreadFamilyName(PRThreadImpl.java:1661)
    at com.pega.pegarules.session.internal.mgmt.base.RequestorPageDir.getFamilyPageMapForCurrentThread(RequestorPageDir.java:460)
    at com.pega.pegarules.session.internal.mgmt.base.RequestorPageDir.getPage(RequestorPageDir.java:238)
    at com.pega.pegarules.session.internal.mgmt.base.RequestorPageDir.getPage(RequestorPageDir.java:222)
    at com.pega.pegarules.session.internal.mgmt.base.RequestorPageDir.getRequestorPage(RequestorPageDir.java:275)
    at com.pega.pegarules.session.internal.mgmt.PRRequestorImpl.getRequestorPage(PRRequestorImpl.java:1077)
    at com.pega.pegarules.session.internal.mgmt.base.ThreadPassivation.configureThreadImpl(ThreadPassivation.java:242)
    at com.pega.pegarules.session.internal.mgmt.PRThreadBase.configureThread(PRThreadBase.java:438)
    at com.pega.pegarules.session.internal.mgmt.PRThreadImpl.<init>(PRThreadImpl.java:307)
    at com.pega.pegarules.session.internal.mgmt.PRThreadImpl.acquire(PRThreadImpl.java:318)
............

Steps to Reproduce

NA

Root Cause

The UsageDaemon background thread runs all the time, and this particular thread somehow is getting interfered with normal threads of the user requestors, which is not expected to happen in the happy path scenario. If the daemon ends up using this recycled thread, due to this bug, it uses this thread without properly re-initializing it.
 

Resolution

HFix-20640 is provided.