A fix is available
APAR status
Closed as program error.
Error description
Typically the WebSphere Scheduler service requires only one instance being active in a cluster of servers. However, WebSphere for z/OS servers are normally configured with multiple servants and the scheduler poll daemon does not restrict itself to operating in only one Servant region. This can lead to multiple servants attempting to run the same task. One of the possible symptoms can be the following warning: com.ibm.websphere.scheduler.TaskPending: SCHD0057W: The task information for task ID 1664701 for scheduler MyScheduler (MyScheduler) cannot be updated in the database because the task has already been run by another Scheduler, the task information was changed, or the task was cancelled.
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: All users of IBM WebSphere Application * * Server V6.1 * **************************************************************** * PROBLEM DESCRIPTION: All Servants attempts to fire the * * same task within a z/OS server * * resulting in SCHD0057W * **************************************************************** * RECOMMENDATION: * **************************************************************** The scheduler service will be started on all servers in the cluster. A lease is required for the scheduler service to start processing the tasks and for ensuring that only one scheduler instance will fire the task. Typically the server that comes up first will obtain the lease. WebSphere z/OS platform supports multiple servants for Workload Managament (WLM) and it was found that all of these servants within a z/OS server were able to obtain the leases. This was possible because the scheduler uses the server name for the lease owner name and all of these servant shared the same name and hence they were all able to obtain the lease and also can fire the tasks. This can result in the following messages in a multi servant z/OS environment: com.ibm.websphere.scheduler.TaskPending: SCHD0057W: The task information for task ID 1664701 for scheduler MyScheduler (MyScheduler) cannot be updated in the database because the task has already been run by another Scheduler, the task information was changed, or the task was cancelled. Now with this APAR, the lease owner name has been made unique to uniquely identify each servant and thereby ensuring only one servant will obtain the lease at any point of time.
Problem conclusion
The WebSphere scheduler component has been updated such that the scheduler poll daemon is active on only on servant in a z/OS server envrionment. APAR PM65489 is currently targeted for inclusion in WebSphere Application Server V6.1 Fix Pack 6.1.0.45. 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
PM65489
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
2012-05-24
Closed date
2012-06-06
Last modified date
2012-10-01
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 UK81646
UP12/09/23 P F209
Fix is available
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Document Information
Modified date:
10 February 2022