[jira] [Created] (HDDS-16387) ContainerBalancer status --verbose throws IllegalStateException after a rejected start

["Navin Kumar (Jira)" <ji...@apache.org>]

Navin Kumar created HDDS-16387:
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             Summary: ContainerBalancer status --verbose throws IllegalStateException after a rejected start
                 Key: HDDS-16387
                 URL: https://issues.apache.org/jira/browse/HDDS-16387
             Project: Apache Ozone
          Issue Type: Bug
          Components: SCM
            Reporter: Navin Kumar
            Assignee: Navin Kumar


ContainerBalancer#start() and ContainerBalancer#startBalancer() assign
{\{startedAt = OffsetDateTime.now()}} at the very top of the method, *before*
state/configuration validation runs. If a start attempt is rejected during
validation, startedAt is still advanced even though no new balancing
run actually begins.
 
After a previous run has completed (so stoppedAt is set), a subsequent
rejected start pushes startedAt *past* stoppedAt. This yields a negative
"balancing duration".


ContainerBalancer#start() and ContainerBalancer#startBalancer() assign
{\{startedAt = OffsetDateTime.now()}} at the very top of the method, *before*
state/configuration validation runs. If a start attempt is rejected during
validation (invalid config, SCM in safe mode, non-leader SCM, or balancer
already running), startedAt is still advanced even though no new balancing
run actually begins.
 
After a previous run has completed (so stoppedAt is set), a subsequent
rejected start pushes startedAt *past* stoppedAt. This yields a negative
"balancing duration".



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