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  1. Hadoop HDFS
  2. HDFS-7541 Upgrade Domains in HDFS
  3. HDFS-9922

Upgrade Domain placement policy status marks a good block in violation when there are decommissioned nodes

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    Details

    • Type: Sub-task
    • Status: Resolved
    • Priority: Minor
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 2.9.0, 3.0.0-alpha1, 2.8.2
    • Component/s: None
    • Labels:
      None
    • Hadoop Flags:
      Reviewed

      Description

      When there are replicas of a block on a decommissioned node, BlockPlacementStatusWithUpgradeDomain#isUpgradeDomainPolicySatisfied returns false when it should return true. This is because numberOfReplicas is the number of in-service replicas for the block and upgradeDomains.size() is the number of upgrade domains across all replicas of the block. Specifically, we hit this scenario when numberOfReplicas is equal to upgradeDomainFactor and upgradeDomains.size() is greater than numberOfReplicas.

      private boolean isUpgradeDomainPolicySatisfied() {
          if (numberOfReplicas <= upgradeDomainFactor) {
            return (numberOfReplicas == upgradeDomains.size());
          } else {
            return upgradeDomains.size() >= upgradeDomainFactor;
          }
        }
      

        Attachments

        1. HDFS-9922-trunk-v4.patch
          16 kB
          Ming Ma
        2. HDFS-9922-trunk-v3.patch
          15 kB
          Chris Trezzo
        3. HDFS-9922-trunk-v2.patch
          17 kB
          Chris Trezzo
        4. HDFS-9922-trunk-v1.patch
          6 kB
          Chris Trezzo
        5. HDFS-9922.branch-2.8.001.patch
          16 kB
          Ming Ma

          Activity

            People

            • Assignee:
              ctrezzo Chris Trezzo
              Reporter:
              ctrezzo Chris Trezzo
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              Dates

              • Created:
                Updated:
                Resolved: