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Various cassandra related alerts and diagnostic statuses after upgrading to StorageGRID 12.0

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Applies to

NetApp StorageGRID 12.0 (earlier than 12.0.0.6)

Issue

After upgrading to version 12.0 the following alerts and Diagnostic statuses may be reported:

  • Cassandra repair progress slow   -  this is reported due to a miscalculation and the repair is in fact alright. These  alerts will only occur until a few days after the upgrade completed. This issue is resolved in Hotfix 12.0.0.3. 
  • Cassandra auto-compactor error
  • Cassandra compactions overloaded
  • Cassandra offheap memory too high 
  • Cassandra imbalanced SStables
  • A single  node with significantly higher CPU than other nodes, due to cassandra compaction - pendig hotfix

Note that none of this are known to have any functional impact.

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