Min Chen created CLOUDSTACK-7628:
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             Summary: VM Worker job should be expunged one hour after 
completion instead of currently being expunged whenever cleanup task thread is 
run.
                 Key: CLOUDSTACK-7628
                 URL: https://issues.apache.org/jira/browse/CLOUDSTACK-7628
             Project: CloudStack
          Issue Type: Bug
      Security Level: Public (Anyone can view this level - this is the default.)
          Components: Management Server
    Affects Versions: 4.3.0
            Reporter: Min Chen
            Priority: Critical
             Fix For: 4.5.0


Based on design, when VM worker job cleanup thread runs, it should only expunge 
those vm work jobs that are completed more than one hour ago. This is to 
prevent some Db constraint error in expunging these jobs since there are still 
reference to the worker job in async_job_map table. Also on some racing 
condition, we will encounter NPE due to removal of such jobs too quickly.



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