A fix is available
APAR status
Closed as program error.
Error description
The plugin is in a mutex deadlock: one thread owns the configuration mutex and is waiting on the the esi mutex, and there is another thread that owns the esi mutex and is wating on the configuration mutex. All incoming requests will try to get the configuration mutex, so they will all get hung up.
Local fix
Turning the esi invalidator off bypasses the problem. <Property Name="ESIInvalidationMonitor" Value="false"/>
Problem summary
**************************************************************** * USERS AFFECTED: IBM WebSphere Application Server web * * server plugin V6.1.0 users * **************************************************************** * PROBLEM DESCRIPTION: Deadlock can occur when reloading * * configuration and processing requests * **************************************************************** * RECOMMENDATION: * **************************************************************** If there are frequent configuration changes such that the plugin configuration is being reload and requests are being processed, a deadlock situation can occur where the processing request and the reload are both waiting for a semaphore. This will only occur if ESI caching is enabled.
Problem conclusion
Change has been made to avoid the deadlock situation. If you are disabling ESI caching, it is recommended to stop and restart the webserver instead of a dynamic reload. APAR PM81813 is currently targeted for inclusion in Fix Pack 6.1.0.47 of WebSphere Application Server V6.1. 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
PM81813
Reported component name
WEBSPHERE FOR Z
Reported component ID
5655I3500
Reported release
610
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2013-01-31
Closed date
2013-03-21
Last modified date
2013-10-04
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
R610 PSY UK97031
UP13/09/07 P F309
Fix is available
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Document Information
Modified date:
10 February 2022