SAP Knowledge Base Article - Preview

3786455 - false alert for hana metric "high number of threads waiting for locks" due to phantom semaphore wait threads in system monitoring, SAP solution manager

Symptom

  • System Monitoring raises warning/critical alerts for the metric "High number of threads waiting for locks".
  • HANA thread views show threads with status "Semaphore Wait".
  • The reported threads are inactive/phantom and do not indicate an actual locking issue.
  • No specific error code is displayed.


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Environment

  • Product: SAP Solution Manager 7.2
  • Monitoring and Alerting Infrastructure (System Monitoring)

Product

SAP Solution Manager all versions

Keywords

hana threads, semaphore wait, phantom threads, high number of threads waiting for locks, system monitoring, solution manager, monitoring and alerting infrastructure, custom metric, collection parameters, expert mode, duration -1, thread_state running, false alert, host agent, hana db monitoring , KBA , SV-SMG-MON-ALR , Monitoring/Alerting/Reporting Infrastructure , Problem

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