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  1. Solr
  2. SOLR-13248

Autoscaling based replica placement is broken out of the box

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Details

    • Bug
    • Status: Closed
    • Blocker
    • Resolution: Fixed
    • 7.6, 7.7
    • 7.7.1, 8.0, 9.0
    • AutoScaling
    • None

    Description

      SOLR-12739 made autoscaling as the default replica placement strategy. However in the absence of SOLR-12845, replicas can be placed without any regards for maxShardsPerNode causing multiple replicas of the same shard to be placed on the same node together. Also it was reported in SOLR-13247 that createNodeSet is not being respected as well.

      SOLR-13159 was an early signal of the problem but it was not reproducible and there was a DNS problem in the cluster too so the root cause was not clear then.

      I am creating this blocker issue because as it stands today, we cannot guarantee the layout of new collections. At a minimum, we should revert to using the legacy replica assignment policy or add default policies with SOLR-12845 and have createNodeSet work. Related but not mandatory would be to fix SOLR-12847 as well.

      Attachments

        1. SOLR-13248-withDefaultCollectionProp.patch
          7 kB
          Jan Høydahl
        2. SOLR-13248-branch7x-backport.patch
          12 kB
          Ishan Chattopadhyaya
        3. SOLR-13248.patch
          4 kB
          Shalin Shekhar Mangar
        4. SOLR-13248.patch
          10 kB
          Shalin Shekhar Mangar
        5. SOLR-13248.patch
          12 kB
          Shalin Shekhar Mangar

        Issue Links

        incorporates

        Bug - A problem which impairs or prevents the functions of the product. SOLR-13247 Incorrect shard placement during Collection creation

        • Major - Major loss of function.
        • Open

        Bug - A problem which impairs or prevents the functions of the product. SOLR-13159 Autoscaling not distributing collection evenly

        • Major - Major loss of function.
        • Resolved
        is caused by

        Improvement - An improvement or enhancement to an existing feature or task. SOLR-12739 Make autoscaling policy based replica placement the default strategy for placing replicas

        • Major - Major loss of function.
        • Closed
        is related to

        Bug - A problem which impairs or prevents the functions of the product. SOLR-12944 Bugs around createNodeSet=EMPTY

        • Major - Major loss of function.
        • Open

        Bug - A problem which impairs or prevents the functions of the product. SOLR-12847 Cut over implementation of maxShardsPerNode to a collection policy

        • Major - Major loss of function.
        • Closed

        Improvement - An improvement or enhancement to an existing feature or task. SOLR-12845 Add a default cluster policy

        • Major - Major loss of function.
        • Closed

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            shalin Shalin Shekhar Mangar
            shalin Shalin Shekhar Mangar
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            Dates

              Created:
              Updated:
              Resolved:

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