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  1. Cassandra
  2. CASSANDRA-9662

compactionManager reporting wrong pendingtasks

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Details

    • Bug
    • Status: Resolved
    • Low
    • Resolution: Fixed
    • 2.0.17, 2.1.9
    • Legacy/CQL
    • None
    • Low

    Description

      Yesterday I upgraded my Cassandra cluster from 2.0.14 to 2.0.16, after upgrade, I am start seeing some strange behaviours of "PendingTasks" reporting.

      The Cassandra repository I am using is datastax, steps I performed for upgrade:

      yum update -y cassandra20

      The upgrade went fine, after upgrade cluster is operating okay. "nodetool info and nodetool status" results looked fine. "nodetool version" is reporting the correct version.

      But our monitoring system start reporting some crazy "pendingtasks". For example, "pending taks" for node1 sometimes jump from 0 to 15K for about 1 minute, then drop back to 0. This issue keeps occurring, didn't have this issue with 2.0.14. Our monitoring system is checking the value of "MBeans" -> "CompactionManager" -> "PendingTasks".

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          Tony Xu

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              yukim Yuki Morishita
              lazyadmin Tony Xu
              Yuki Morishita
              Benedict Elliott Smith
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