Hadoop HDFS
  1. Hadoop HDFS
  2. HDFS-2422

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

    Details

    • Type: Bug Bug
    • Status: Closed
    • Priority: Major 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.

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

        Issue Links

          Activity

          No work has yet been logged on this issue.

            People

            • Assignee:
              Aaron T. Myers
              Reporter:
              Jeff Bean
            • Votes:
              0 Vote for this issue
              Watchers:
              14 Start watching this issue

              Dates

              • Created:
                Updated:
                Resolved:

                Development