Hadoop Common
  1. Hadoop Common
  2. HADOOP-8008

Document how to change the default loglevels

    Details

    • Type: Improvement Improvement
    • Status: Open
    • Priority: Major Major
    • Resolution: Unresolved
    • Affects Version/s: None
    • Fix Version/s: None
    • Component/s: documentation
    • Labels:

      Description

      The hadoop.root.logger defined in log4j.properties is only used by applications. The scripts (bin and daemons) always set it to HADOOP_ROOT_LOGGER or "INFO,console" so the installed log4j.properties appears to be ignored. The wiki doesn't cover this:
      http://wiki.apache.org/hadoop/HowToConfigure

      We should update the cluster setup docs to indicate how the loglevel is configured and also add a comment in log4j.properties that the hadoop.root.logger defined there is not used by Hadoop itself, that HADOOP_ROOT_LOGGER must be set. This is relevant for commands and daemons, though the latter also has daemonlog (http://hadoop.apache.org/common/docs/current/commands_manual.html#daemonlog).

      1. HADOOP-8008.txt
        1 kB
        Tomohiko Kinebuchi

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          People

          • Assignee:
            Tomohiko Kinebuchi
            Reporter:
            Eli Collins
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            Dates

            • Created:
              Updated:

              Development