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  1. Hadoop Common
  2. HADOOP-9085

start namenode failure,bacause pid of namenode pid file is other process pid or thread id before start namenode

    Details

    • Type: Bug
    • Status: Resolved
    • Priority: Major
    • Resolution: Duplicate
    • Affects Version/s: 2.0.1-alpha, 2.0.3-alpha
    • Fix Version/s: None
    • Component/s: bin, scripts
    • Labels:
      None
    • Environment:

      NA

      Description

      pid of namenode pid file is other process pid or thread id before start namenode,start namenode will failure.because the pid of namenode pid file will be checked use kill -0 command before start namenode in hadoop-daemo.sh script.when pid of namenode pid file is other process pid or thread id,checkt is use kil -0 command,and the kill -0 will return success.it means the namenode is runing.in really,namenode is not runing.

      2338 is dead namenode pid
      2305 is datanode pid

      cqn2:/tmp # kill -0 2338
      cqn2:/tmp # ps -wweLo pid,ppid,tid | grep 2338
      2305 1 2338

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              • Assignee:
                Unassigned
                Reporter:
                ewenpower liaowenrui
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                Dates

                • Created:
                  Updated:
                  Resolved: