PM15951: ODC IS MAKING EXCESSIVE GETTREE CALLS.

Fixes are 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 V6.1.0   *
****************************************************************
* 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 PM15951 is currently targeted for inclusion in
Service Level (Fix Pack) 6.1.0.35 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
PM15951
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
2010-06-04
Closed date
2010-08-24
Last modified date
2011-01-03

APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:

PM23608

Fix information

Fixed component name
WEBSPHERE FOR Z
Fixed component ID
5655I3500

Applicable component levels

R610 PSY UK62676
UP10/12/17 P F012

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.

[{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SS7K4U","label":"WebSphere Application Server for z\/OS"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"6.1","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
24 October 2021

Tips

PM15951: ODC IS MAKING EXCESSIVE GETTREE CALLS.

Fixes are available

Subscribe

APAR status

Closed as program error.

Error description

Local fix

Problem summary

Problem conclusion

Temporary fix

Comments

APAR Information

APAR number

Reported component name

Reported component ID

Reported release

Status

PE

HIPER

Special Attention

Submitted date

Closed date

Last modified date

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

Fixed component ID

Applicable component levels

R610 PSY UK62676

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.

Document Information

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