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StorageGRID reports ILM Placement Instruction Unachievable Due to QUORUM Consistency Level Not Achieved

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storagegrid
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Applies to

StorageGRID 11.x

Issue

  • A placement instruction in an ILM rule could not be achieved for certain objects. 
  • The following alert and related log entries were observed:

Example Alert/Log Output:

  • ILM Placement unachievable alert triggered for node <node_name>.

Sep 10 05:36:31 <node_name> ADE: | ... | ERROR 0277 RDRT: retrieveActiveRepairIds CassandraUnavailableException(SELECT repair_id FROM storagegrid.replicated_data_repair_history WHERE completed_time=0 ALLOW FILTERING - CassandraDriverError(Unavailable): 'Cannot achieve consistency level QUORUM' DetailedInfo:[consistency:QUORUM, responses_received:3, responses_required:4])

  • Additional log evidence indicated network instability and NTP synchronization issues:

Command: ntpq -pn
Result:
     remote           refid      st t when poll reach   delay   offset  jitter
==============================================================================
    <NTP IP>          .STEP.     16 u    -   64    0    0.000   +0.000   0.000 >>>> not working

  • One of the configured NTP servers was not responding, and the NTP stratum count is greater than 3.

 

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