APAR status
Closed as program error.
Error description
When using the WXS dynamic cache plugin, heavy simultaneous load may result in the ORB threads becoming exhausted, resulting in LockTimeoutExceptions.
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: All users of the WebSphere eXtreme Scale * * Dynamic cache provider. * **************************************************************** * PROBLEM DESCRIPTION: See "Error Description" * **************************************************************** * RECOMMENDATION: * **************************************************************** In WXS, a Put() operation requires a getForUpdate(), which locks the entry, followed by the put(). This activity takes place on the WXS client, resulting in multiple "hops" to the WXS server. Under significant load the number of ORB threads on the WXS server may become exhausted with threads attempting to get a specific lock. When this happens the client process that holds the lock will be unable to complete the getForUpdate()/Put() operations until an ORB thread becomes available.
Problem conclusion
The solution to this issue is to move the getForUpdate()/Put() activities into an Agent so that they will take place on the WXS server. This eliminates the multiple "hops" and resulting ORB thread contention.
Temporary fix
Comments
APAR Information
APAR number
PM35274
Reported component name
XD EXTREME SCAL
Reported component ID
5724J3402
Reported release
610
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2011-03-21
Closed date
2011-03-28
Last modified date
2011-03-28
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
XD EXTREME SCAL
Fixed component ID
5724J3402
Applicable component levels
R710 PSY
UP
[{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSTVLU","label":"WebSphere eXtreme Scale"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"6.1","Edition":"","Line of Business":{"code":"LOB45","label":"Automation"}}]
Document Information
Modified date:
23 September 2020