A fix is available
APAR status
Closed as program error.
Error description
Excessive cpu usage and possible OOM due to excessive getTreeRequest/Response invocations by ODC.
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: All users of IBM WebSphere Application * * Server Network Deployment for z/OS V7.0 * * * **************************************************************** * PROBLEM DESCRIPTION: The On Demand Configuration (ODC) * * component can cause high CPU and OOM * * conditions. * * * **************************************************************** * RECOMMENDATION: * **************************************************************** The On Demand Configuration (ODC) component recovery logic can cause a multitude of getTreeRequestTimeout task objects to be scheduled resulting in a near continuous flood of getTreeRequests being sent causing a high CPU condition and the potential for an OutOfMemoryException due to the added stress on the HA Manager Bulletin Board.
Problem conclusion
The On Demand Configuration (ODC) recovery logic has been corrected to properly cancel the getTreeRequestTimeout tasks, ensure no more than one getTreeRequestTimeout task is scheduled at any given time on a single process, and delay the resend of a getTreeRequest by 30 seconds if the getTreeRequest is destined for the same process that the last getTreeRequest was sent to. Thus avoid the potential for the recovery logic to cause high CPU and OOM conditions. APAR PM23608 is currently targeted for inclusion in Service Level (Fix Pack) 7.0.0.13 of WebSphere Application Server V7.0. 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
PM23608
Reported component name
WEBSPHERE FOR Z
Reported component ID
5655I3500
Reported release
700
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2010-09-30
Closed date
2010-10-06
Last modified date
2010-11-03
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Modules/Macros
BBGUBINF BBOUBINF
Fix information
Fixed component name
WEBSPHERE FOR Z
Fixed component ID
5655I3500
Applicable component levels
R700 PSY UK61146
UP10/10/21 P F010
Fix is available
Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.
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Document Information
Modified date:
10 February 2022