Apache Whirr (retired)
  1. Apache Whirr (retired)
  2. WHIRR-342

hadoop/hbase configuration & active roles on a node


    • Type: Improvement Improvement
    • Status: Resolved
    • Priority: Major Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 0.7.0
    • Labels:


      The following limitations exist with the generation of hadoop-(core|hdfs|mapred).xml and hbase-site.xml (assuming WHIRR-339 applied):

      • they are not generated by all roles (e.g. tasktracker, thrift server, ...), by consequence running these roles by themselves on a node unaccompagnied of a role that does generate them will not work.
      • running two roles on the same node that generate the same files does not work as it should, as the generated contents gets appended twice to the same file, causing non-well-formed XML. This is because of the usage of jcloud's Statements.appendFile.

      The cheapest solution would be to replace Statements.appendFile with something similar but without the 'append' behavior, thus rather a 'Statements.overwriteFile' (not available in jclouds afaics).

      This of course assumes that when different roles are writing the same files, that they put the same contents in them, so that the overwriting does not matter.

      Alternatively, things could be made smarter so that the same configuration is only generated once for all roles.

      1. WHIRR-342.patch
        45 kB
        Karel Vervaeke
      2. WHIRR-342.patch
        42 kB
        Karel Vervaeke
      3. WHIRR-342.patch
        32 kB
        Karel Vervaeke
      4. WHIRR-342.patch
        8 kB
        Karel Vervaeke
      5. WHIRR-342.patch
        8 kB
        Karel Vervaeke

        Issue Links


          No work has yet been logged on this issue.


            • Assignee:
              Karel Vervaeke
              Bruno Dumon
            • Votes:
              0 Vote for this issue
              0 Start watching this issue


              • Created: