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  1. Hadoop HDFS
  2. HDFS-12943 Consistent Reads from Standby Node
  3. HDFS-14792

[SBN read] StanbyNode does not come out of safemode while adding new blocks.

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Details

    • Sub-task
    • Status: Resolved
    • Major
    • Resolution: Fixed
    • 2.10.0
    • 2.10.1
    • namenode
    • None

    Description

      During startup StandbyNode reports that it needs additional X blocks to reach the threshold 1.0000. Where X is changing up and down.
      This is because with fast tailing SBN adds new blocks from edits while DNs have not reported replicas yet. Being in SafeMode SBN counts new blocks towards the threshold and can stay in SafeMode for a long time.
      By design, the purpose of startup SafeMode is to disallow modifications of the namespace and blocks map until all DN replicas are reported.

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          Is contained by

          Bug - A problem which impairs or prevents the functions of the product. HDFS-14941 Potential editlog race condition can cause corrupted file

          • Major - Major loss of function.
          • Resolved

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              Unassigned Unassigned
              shv Konstantin Shvachko
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              Dates

                Created:
                Updated:
                Resolved: