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  1. Hadoop HDFS
  2. HDFS-2422

The NN should tolerate the same number of low-resource volumes as failed volumes

    Details

    • Type: Bug
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 0.23.0
    • Fix Version/s: 0.23.0
    • Component/s: namenode
    • Labels:
      None
    • Target Version/s:
    • Hadoop Flags:
      Reviewed

      Description

      We encountered a situation where the namenode dropped into safe mode after a temporary outage of an NFS mount.

      At 12:10 the NFS server goes offline

      Oct 8 12:10:05 <namenode> kernel: nfs: server <nfs host> not responding, timed out

      This caused the namenode to conclude resource issues:

      2011-10-08 12:10:34,848 WARN org.apache.hadoop.hdfs.server.namenode.NameNodeResourceChecker: Space available on volume '<nfs host>' is 0, which is below the configured reserved amount 104857600

      Temporary loss of NFS mount shouldn't cause safemode.

        Attachments

        1. HDFS-2422.patch
          7 kB
          Aaron T. Myers

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              • Assignee:
                atm Aaron T. Myers
                Reporter:
                jwfbean Jeff Bean
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                Dates

                • Created:
                  Updated:
                  Resolved: