Fixes are available
8.5.5.9: WebSphere Application Server V8.5.5 Fix Pack 9
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
8.5.5.12: WebSphere Application Server V8.5.5 Fix Pack 12
8.5.5.13: WebSphere Application Server V8.5.5 Fix Pack 13
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
The application is able to write from resource which initiated the WriteListener as well as blocking write is allowed from the listener. Both these should not be allowed once WriteListener is enabled.
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: All users of IBM WebSphere Application * * Server Liberty Profile - Web Container * **************************************************************** * PROBLEM DESCRIPTION: Blocking write is not allowed once * * WriteListener is enabled. * **************************************************************** * RECOMMENDATION: * **************************************************************** The application is able to perform a blocking write from a resource which initiated the WriteListener. A blocking write is allowed from the WriteListener as well. These should not be allowed once WriteListener is enabled. Also when the OutputStream is closed write(), isReady() , setWriteListener() APIs must not be invoked since these can cause IOException to be thrown. WebConnection close() must also check if the OutputStream has been closed.
Problem conclusion
The Webcontainer code is is updated to make sure the blocking write is not allowed once WriteListener is enabled. Once OutputStream is closed write(), isReady() , setWriteListener() APIs will return immidiately and WebConnection close() will also check if OutputStream is closed. The fix for this APAR is currently targeted for inclusion in fix pack 8.5.5.9. 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
PI57884
Reported component name
WAS LIBERTY COR
Reported component ID
5725L2900
Reported release
855
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2016-02-23
Closed date
2016-02-24
Last modified date
2016-02-24
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 LIBERTY COR
Fixed component ID
5725L2900
Applicable component levels
R855 PSY
UP
Document Information
Modified date:
27 April 2022