Fixes are available
7.0.0.41: WebSphere Application Server V7.0 Fix Pack 41
7.0.0.43: WebSphere Application Server V7.0 Fix Pack 43
7.0.0.45: WebSphere Application Server V7.0 Fix Pack 45
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
APAR status
Closed as program error.
Error description
Very rarely, an FFDC is produced indicating a NullPointerException similar to the following: >Exception = java.lang.NullPointerException >Source = com.ibm.ws.tcpchannel.internal.SocketRWChannelSelector >probeid = 254 >Stack Dump = java.lang.NullPointerException > at com.ibm.ws.tcpchannel.internal.SocketRWChannelSelector.updat eSelector(SocketRWChannelSelector.java:193) > at com.ibm.ws.tcpchannel.internal.ChannelSelector.run(ChannelSe lector.java:227) > at java.lang.Thread.run(Thread.java:804) The error itself is harmless other than the appearance of the FFDC. It is produced because the ChannelSelector thread is processing connections that may have been closed by another thread, and there is a timing window where the ChannelSelector, while attempting to write an event trace, will dereference a null field obtained from a closed connection.
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: IBM WebSphere Application Server Version * * 7.0, 8.0 and 8.5.5 Full Profile * **************************************************************** * PROBLEM DESCRIPTION: A First Failure Data Capture (FFDC) * * is produced for a * * java.lang.NullPointerException in the * * TCP Channel * * SocketRWChannelSelector.updateSelector * * method * **************************************************************** * RECOMMENDATION: * **************************************************************** Very rarely, an FFDC is produced indicating a java.lang.NullPointerException similar to the following: >Exception = java.lang.NullPointerException >Source = com.ibm.ws.tcpchannel.internal.SocketRWChannelSelector >probeid = 254 >Stack Dump = java.lang.NullPointerException > at com.ibm.ws.tcpchannel.internal.SocketRWChannelSelector.updateSel ector(SocketRWChannelSelector.java:193) > at com.ibm.ws.tcpchannel.internal.ChannelSelector.run(ChannelSelect or.java:227) > at java.lang.Thread.run(Thread.java:804) The error itself is harmless other than the appearance of the FFDC. It is produced because the ChannelSelector thread is processing connections that may have been closed by another thread, and there is a timing window where the ChannelSelector, while attempting to write an event trace, will dereference a null field obtained from a closed connection.
Problem conclusion
The TCP Channel was modified to avoid the NullPointerException. The fix for this APAR is currently targeted for inclusion in Java 8 SR2, Java 7.1 SR3 FP20, Java 7 SR9 FP20, Java 6.1 SR8 FP15, and Java 6 SR16 FP15. IBM WebSphere Application Server Version 8.5.5.9, 8.0.0.12, and 7.0.0.41 will include one of the above mentioned Java releases. 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
PI47257
Reported component name
WEBSPHERE APP S
Reported component ID
5724J0800
Reported release
850
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2015-08-20
Closed date
2015-10-15
Last modified date
2015-10-15
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 APP S
Fixed component ID
5724J0800
Applicable component levels
R700 PSY
UP
R800 PSY
UP
R850 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":"8.5","Line of Business":{"code":"LOB45","label":"Automation"}}]
Document Information
Modified date:
01 November 2021