PM78427; 7.0.0.27: deadlock in sip container code

Download Description

PM78427 resolves the following problem:

ERROR DESCRIPTION:
Dead lock in Sip Container code.
"SIPThreadPool : 43" J9VMThread:0x53159200,
j9thread_t:0x49C93628,
java/lang/Thread:0x08325650, state:B, prio=5
(native thread ID:0xC5C, native priority:0x5, native
policy:UNKNOWN)
Java callstack:
at
com/ibm/ws/sip/container/servlets/WASXSipApplicationSessionImpl.
invalidate(WASXSipApplicationSessionImpl.java:102)
at
com/ibm/ws/sip/container/timer/AppSessionTimerListener.invokeExp
iredTimer(AppSessionTimerListener.java:226)
at
com/ibm/ws/sip/container/timer/ExpirationTimer.run(ExpirationTim
er.java:122(Compiled Code))
at
com/ibm/ws/sip/container/was/SignalingEndOfTask.run(SignalingEnd
OfTask.java:67(Compiled Code))

LOCAL FIX:
n/a

PROBLEM SUMMARY

USERS AFFECTED:
All IBM WebSphere Application Server Session Initiation Protocol (SIP) users

PROBLEM DESCRIPTION:
Dead-lock in the SIP Container threads - Expiration Timer is invoked due to Application Session expiration and invalidation.

RECOMMENDATION:
None

Expiration Timer invocation was synchronized on the same timer object.

PROBLEM CONCLUSION:
To prevent the dead-lock, the Expiration Timer invocation was synchronized on the SIP Application Session object.

The fix for this APAR is currently targeted for inclusion in fix packs 7.0.0.29, 8.0.0.6, and the fix pack following 8.5.0.2. Please refer to the Recommended Updates page for delivery information:
http://www.ibm.com/support/docview.wss?uid=swg27004980