Fixes are available
7.0.0.41: WebSphere Application Server V7.0 Fix Pack 41
8.5.5.10: WebSphere Application Server V8.5.5 Fix Pack 10
8.5.5.11: WebSphere Application Server V8.5.5 Fix Pack 11
8.0.0.13: WebSphere Application Server V8.0 Fix Pack 13
7.0.0.43: WebSphere Application Server V7.0 Fix Pack 43
8.5.5.12: WebSphere Application Server V8.5.5 Fix Pack 12
8.0.0.14: WebSphere Application Server V8.0 Fix Pack 14
8.5.5.13: WebSphere Application Server V8.5.5 Fix Pack 13
7.0.0.45: WebSphere Application Server V7.0 Fix Pack 45
8.0.0.15: WebSphere Application Server V8.0 Fix Pack 15
7.0.0.45: Java SDK 1.6 SR16 FP60 Cumulative Fix for WebSphere Application Server
7.0.0.41: Java SDK 1.6 SR16 FP20 Cumulative Fix for WebSphere Application Server
7.0.0.43: Java SDK 1.6 SR16 FP41 Cumulative Fix for WebSphere Application Server
8.5.5.14: WebSphere Application Server V8.5.5 Fix Pack 14
8.5.5.15: WebSphere Application Server V8.5.5 Fix Pack 15
8.5.5.17: WebSphere Application Server V8.5.5 Fix Pack 17
8.5.5.20: WebSphere Application Server V8.5.5.20
8.5.5.18: WebSphere Application Server V8.5.5 Fix Pack 18
8.5.5.19: WebSphere Application Server V8.5.5 Fix Pack 19
8.5.5.16: WebSphere Application Server V8.5.5 Fix Pack 16
8.5.5.21: WebSphere Application Server V8.5.5.21
APAR status
Closed as program error.
Error description
Under high load in a Clustered environment with session replication, a race condition might occur, when two application requests try to access the same session. This can result in a NullpointerException.
Local fix
n/a
Problem summary
**************************************************************** * USERS AFFECTED: All users of IBM WebSphere Application * * Server version 7.0, 8.0 and 8.5.5 * * implementing asynchronous threads in a M2M * * environment. * **************************************************************** * PROBLEM DESCRIPTION: A NullPointerException may be thrown * * when * * asynchronous threads attempt to access * * a * * session from the replication domain * **************************************************************** * RECOMMENDATION: * **************************************************************** If two asynchronous threads attempt to access the same session simultaneously, and the session needs to be retrieved from the replication domain of a M2M replicated environment, a NullPointerException may result even if Serialized Session Access is enabled.
Problem conclusion
When Serialized Session Access is enabled, the session retrievals from the replication domain are now synchronized to accommodate simultaneous access from asynchronous threads. These changes are targeted for inclusion in fix packs 7.0.0.41, 8.0.0.13 and 8.5.5.10 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
PI52434
Reported component name
WEBS APP SERV N
Reported component ID
5724H8800
Reported release
800
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2015-11-13
Closed date
2016-01-27
Last modified date
2016-08-18
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
WEBS APP SERV N
Fixed component ID
5724H8800
Applicable component levels
R700 PSY
UP
R800 PSY
UP
R850 PSY
UP
Document Information
Modified date:
28 April 2022