IV36442: cicsas crashes with signal 11 while cancelling and Asynchronous request
A fix is available
Closed as program error.
A cicsas receives a signal 11 and hangs. Further processing of region is halted. CICS may abend with a U5655 after a signal 11. The condition is triggered by the use of the EXEC CICS CANCEL call for the transaction.
When an CICS application uses EXEC CICS START API with REQID and PROTECT options, as well as EXEC CICS CANCEL API with same REQID, sometimes a signal 11 is observed in the cicsas. Message in console will look similar to- 26590/0001 CICS Signal Handler entered with signal: 11 26590/0001 Traceback file /var/cics_regions/testregion/dumps/dir1/cicsas26590.traceback for transaction 'TEST' is generated. ERZ014022I/0075 10/30/12 10:50:12.356137742 testregion 26590/0001 : Exception 'exc_e_illaddr' caught during termination of transaction 'TEST' at '????'. The traceback file generated for the cicas, will look similar to- 0xd03c8260 waitpid(??, ??, ??) + 0x170 0xd04679c8 system(??) + 0x1e8 0xd3d224c4 SupOS_StackWalk(??, ??, ??, ??, ??, ??) + 0x178 0xd3d328bc SupOS_TurnSignalToException(??, ??, ??) + 0x6e0 <signal> 0xd3e578fc ConTI_ExtractICE(??) + 0x208 0xd3e59004 ConTI_DeleteICE(??) + 0x340 0xd3fbdd30 ConTI_CommitRetCan(??, ??) + 0x1f8 0xd3e533d0 TasLU_InternalAfterResolution(??, ??) + 0x524 0xd3e5396c TasLU_AfterResolution(??, ??) + 0x3f4 0xd1eb3ee4 event_AfterResolutionWork(??) + 0x174 0xd1eb3c78 LoggedLocalCommit(??) + 0x2a0 0xd1eb4ec8 event_DeliverLocalCommit(??) + 0x690 0xd1ec2f4c PrepareCompleted(??) + 0x378 The above mentioned cicsas which recieved SEGV could lead to- 1) The cicsas which received the signal will be hung, eventually leading to a hung region. 2) The region crashes with U5655 abend. This is caused due to synchronization issue between the cicsas issuing the START and the cicsas performing the CANCEl operation.
The problem has been fixed, and an Interim fix was provided to the customer. The fix will be included in all future releases of TXSeries and FixPacks.
Reported component name
TXSERIES V6 AIX
Reported component ID
Last modified date
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fixed component name
TXSERIES V6 AIX
Fixed component ID
Applicable component levels