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  1. HBase
  2. HBASE-6343

After migrating from one cluster to another, new hmaster dies when reaching out to old nodes

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    Details

    • Type: Bug
    • Status: Resolved
    • Priority: Major
    • Resolution: Won't Fix
    • Affects Version/s: 0.90.6
    • Fix Version/s: None
    • Component/s: migration
    • Labels:
      None
    • Environment:

      centos 6.0

      Description

      I am migrating from cluster (movetest-a.domain.com to another (movetest-b.domain.com), both at the same version of hdfs/hbase. I am using mozilla's Backup tool to copy the /hbase files, but I imagine any copy tool would have this issue. Each cluster has its own zookeeper & HDFS.

      After copying the files, I try to start the new hmaster (movetest-b), and it dies because it cannot resolve the data nodes from the source cluster (eg data01.movetest-a.domain.com).

      Log: http://pastie.org/4212244

      Things I tried that did not work:

      • delete ROOT from the copied data
      • delete .META. from the copied data
      • cleanly shutdown the source before copying (to flush to disk)

      Things I tried that did work:

      • add the source nodes to /etc/hosts, pointing at 127.0.0.2 (which give connection refused):
        127.0.0.2 data01.movetest-a.domain.com data02.movetest-a.domain.com data03.movetest-a.domain.com

      After bringing up the new cluster (with /etc/hosts in place), I was able to delete the /etc/hosts entries, and bounce hbase without error.

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            • Assignee:
              Unassigned
              Reporter:
              plainlystated Patrick
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              • Created:
                Updated:
                Resolved: