PM49633: DEADLOCK ON SIB JS-RECEIVELISTENERDISPATCHERTHREADS

Fixes are available

APAR status

Closed as program error.

Error description

Deadlock between JS-ReceiveListenerDispatcherthreads causes
hang.
.
When the deadlock occurs, a thread dump from the application
server will show one or more threads blocked in the method
com/ibm/ws/sib/comms/server/clientsupport/
ServerTransportAcceptListener.removeAllConversations().  In
order for this APAR to match, another thread must be blocked in
the method com/ibm/ws/sib/jfapchannel/impl/
Connection.getConnectionClosedListener().

Javacore shows the following symptom:

1LKDEADLOCK    Deadlock detected !!!
NULL           ---------------------
NULL
2LKDEADLOCKTHR  Thread "JS-ReceiveListenerDispatcher : 2335"
(0x0000000002578400)
3LKDEADLOCKWTR    is waiting for:
4LKDEADLOCKMON      sys_mon_t:0x000000001E3525F0 infl_mon_t:
0x000000001E352660:
4LKDEADLOCKOBJ
java/lang/Object@0x00000000BFE8A080/0x00000000BFE8A08C:
3LKDEADLOCKOWN    which is owned by:
2LKDEADLOCKTHR  Thread "JS-ReceiveListenerDispatcher : 2317"
(0x0000000002617100)
3LKDEADLOCKWTR    which is waiting for:
4LKDEADLOCKMON      sys_mon_t:0x00000000229AF480 infl_mon_t:
0x00000000229AF4F0:
4LKDEADLOCKOBJ
java/util/HashMap@0x00000000613276D8/0x00000000613276E4:
3LKDEADLOCKOWN    which is owned by:
2LKDEADLOCKTHR  Thread "JS-ReceiveListenerDispatcher : 2335"
(0x0000000002578400)

JS-ReceiveListenerDispatcher : 2335

at
com/ibm/ws/sib/jfapchannel/impl/Connection.getConnectionClosedLi
stener(Connection.java:1651(Compiled Code)) at
com/ibm/ws/sib/jfapchannel/impl/ConversationImpl.getConnectionCl
osedListener(ConversationImpl.java:1814(Compiled Code)) at
com/ibm/ws/sib/comms/server/clientsupport/ServerTransportAcceptL
istener.acceptConnection(ServerTransportAcceptListener.java:127(
Compiled Code)) at
..


JS-ReceiveListenerDispatcher : 2317

at
com/ibm/ws/sib/comms/server/clientsupport/ServerTransportAcceptL
istener.removeAllConversations(ServerTransportAcceptListener.jav
a:264(Compiled Code)) at
com/ibm/ws/sib/comms/server/clientsupport/ServerSideConnection.c
onnectionClosed(ServerSideConnection.java:384) at
com/ibm/ws/sib/jfapchannel/impl/Connection.notifyCloseListeners(
Connection.java:1305(Compiled Code)) at
com/ibm/ws/sib/jfapchannel/impl/Connection.nonThreadSafePhysical
Close(Connection.java:1075(Compiled Code)) at
com/ibm/ws/sib/jfapchannel/impl/Connection.physicalCloseFromInva
lidateImpl(Connection.java:946) at
com/ibm/ws/sib/jfapchannel/impl/InboundConnection.invalidateImpl
(InboundConnection.java:173) at
..

Local fix

Problem summary

****************************************************************
* USERS AFFECTED:  Users of the default messaging provider     *
*                  for IBM WebSphere Application Server        *
****************************************************************
* PROBLEM DESCRIPTION: Deadlock between                        *
*                      JS-ReceiveListenerDispatcher threads.   *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
The locking implementation for the JS-ReceiveListenerDispatcher
threads was incorrect, and did not properly conform to the
locking heirarchy. Under some timing conditions this could lead
to a deadlock.

Problem conclusion

The code has been altered to adher to the locking heirarchy to
ensure the deadlock condition is avoided.

The fix for this APAR is currently targeted for inclusion in fix
pack 7.0.0.23 and 8.0.0.3.  Please refer to the
Recommended Updates page for delivery information:
http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980

Temporary fix

Comments

APAR Information

APAR number
PM49633
Reported component name
WAS SIB & SIBWS
Reported component ID
620800101
Reported release
300
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2011-10-07
Closed date
2011-10-31
Last modified date
2011-10-31

APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:

Fix information

Fixed component name
WAS SIB & SIBWS
Fixed component ID
620800101

Applicable component levels

R800 PSY
UP

[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSEQTP","label":"WebSphere Application Server"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"7.0","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
28 October 2021

Tips

PM49633: DEADLOCK ON SIB JS-RECEIVELISTENERDISPATCHERTHREADS

Fixes are available

Subscribe

APAR status

Closed as program error.

Error description

Local fix

Problem summary

Problem conclusion

Temporary fix

Comments

APAR Information

APAR number

Reported component name

Reported component ID

Reported release

Status

PE

HIPER

Special Attention

Submitted date

Closed date

Last modified date

APAR is sysrouted FROM one or more of the following:

APAR is sysrouted TO one or more of the following:

Fix information

Fixed component name

Fixed component ID

Applicable component levels

R800 PSY

Document Information

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