PQ60787,4.0.2: alarm thread creation and destruction
causes excessive threads
Downloadable files
Abstract
WebSphere Application Server V4.0.2, there can be a
problem with the Alarm thread management.
Download Description
PQ60787 resolves the following problem:
WebSphere Application Server V4.0.2 contains a problem with excessively
high thread ID for the Alarm Thread. There can be a problem with the Alarm
thread management. In V4.0.2, the alarm thread pool size is set to 1. If
more than one alarm fires concurrently, new threads are created to handle
the alarm. At the end of handling the alarm, only one alarm is returned to
the pool, while the remaining threads are destroyed.
WebSphere Application Server uses alarms to check whether or not
reloadable war files have been updated. For some applications, such as
WebSphere Portal Server, there can be up to 90 alarms created, of which,
at any given time,10 can fire. Over time, this creation and destruction of
alarm threads
can ultimately result in a Java™ Virtual Machine (JVM™) hang or
crash.
Prerequisites
None
Installation Instructions
Please refer to the readme.txt for installation instructions.