A fix is available
APAR status
Closed as program error.
Error description
WebSphere for z/OS servers running 64-bit may encounter intermittent S0C4 ABENDs in the Control Region when processing an IIOP request. The corresponding SVCDUMP may show the following stack trace and corrupted DSA chain: -- DSA Entry E Offset Statement Load Mod Program Unit Service Status 1 bbooeqgq(ENQ_DEQ_RName*,SEQUENCE_octet*,int,int,int,int*,int +00000708 *PATHNAM CF13103 Call 2 BBO_BOA::checkTransactionAffinity(ORB_Request*,AffinityRestr +000006E0 *PATHNAM CF13103 Call WARNING An invalid DSA pointer was found on traceback while processing DSA: 0000000A_85CF5F60 and CAA: 0000000A_85EFECF0 DSA DSA Addr E Addr PU Addr PU Offset Comp Date Compile Attribut 1 0000000A_85CF4520 00000000_7CA0EB50 00000000_00000000 +7CA0F2580 20101001 C/C++ POSIX XPLINK EBCDIC IEEE 2 0000000A_85CF4920 00000000_7C859C78 00000000_00000000 +7C85A3580 20101001 C/C++ POSIX XPLINK EBCDIC IEEE WARNING An invalid DSA pointer was found on traceback while processing DSA: 0000000A_85CF5F60 and CAA: 0000000A_85EFECF0 -- Often the server terminates happens due to a S0C4 on a different TCB a few seconds later. For example: -- TCB 8cb598 Dsa Entry Offset Function --- ----- ------ -------- 9bfcf7f20 1ad36d80 000077e8 CELQDMDR 9bfcf99c0 1ad4e678 00001364 CEEKDUMP 9bfcfa2e0 1ae1b0c8 000047d4 CEEHDSP 9bfcfcc00 1b01b620 000013e2 CEEOSIGG 9bfcfda20 1ae2f3c8 00000392 CEEHSGL 9bfcfdcc0 1ae2fec0 00000068 CEEHSGLT 9bfcfdee0 1aecfb18 00001946 CEEOPCB 9bfcfe260 1b17f000 0000003e pthread_cond_broadcast 9bfcfe360 1d43de28 000001b2 j9thread_monitor_notify 9bfcfe460 1d390700 00c54728 RUNJAVATHREAD 9bfcfe8a0 1d409580 000000e0 javaProtectedThreadProc 9bfcfe9a0 1d4ad268 0000071a j9sig_protect 9bfcff1a0 1d40c0b8 00000072 javaThreadProc 9bfcff2a0 1d43b5e0 0000051c thread_wrapper 9bfcff3a0 1aed60d8 00000f56 CELQPCMM -- However Logrec should show the first S0C4 to be from function bbooeqgq(ENQ_DEQ_RName*,SEQUENCE_octet*,int,int,int,int*,int
Local fix
Run servers in 31-bit to avoid this problem
Problem summary
**************************************************************** * USERS AFFECTED: All users of IBM WebSphere Application * * Server V7.0 * **************************************************************** * PROBLEM DESCRIPTION: A WebSphere Application Server for z/OS * * server running with multiple Servants * * does not route HTTP requests with * * session affinity to the proper Servant. * **************************************************************** * RECOMMENDATION: * **************************************************************** By default, the name of the cookie that carries session affinity information is JSESSIONID, however this value can be overridden for a specific application or web module. When a WebSphere for z/OS Controller routes HTTP requests to a Servant, it looks for session affinity information in the cookie name that is specified at the server level; it does not check if the session cookie name is overridden at another level. Thus, if the option to override the session cookie name at the application or web module level is enabled, WebSphere Application Server for z/OS servers with more than one Servant will not be able to route HTTP requests for that application or module to the right Servant.
Problem conclusion
Code was changed so that the Controller properly checks for an overridden session cookie name at the application or web module level for each request. APAR PM26774 is currently targeted for inclusion in Service Level (Fix Pack) 7.0.0.17 of WebSphere Application Server V7.0. Please refer to URL: //www.ibm.com/support/docview.wss?rs=404&uid=swg27006970 for Fix Pack availability.
Temporary fix
Comments
APAR Information
APAR number
PM29467
Reported component name
WEBSPHERE FOR Z
Reported component ID
5655I3500
Reported release
700
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2010-12-23
Closed date
2011-04-06
Last modified date
2011-06-02
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
WEBSPHERE FOR Z
Fixed component ID
5655I3500
Applicable component levels
R700 PSY UK67335
UP11/05/19 P F105
Fix is available
Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.
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Document Information
Modified date:
10 February 2022