Hadoop Common
  1. Hadoop Common
  2. HADOOP-5759

IllegalArgumentException when CombineFileInputFormat is used as job InputFormat

    Details

    • Type: Bug Bug
    • Status: Resolved
    • Priority: Major Major
    • Resolution: Fixed
    • Affects Version/s: 0.20.1, 0.20.205.0
    • Fix Version/s: 0.20.2
    • Component/s: None
    • Labels:
      None

      Description

      As per my understanding, CombineFileInputFormat is creating splits with rackname as split location.
      When I use CombineFileInputFormat as the InputFormat for job, job initialization fails with following exception :
      2009-04-28 14:10:40,162 ERROR mapred.EagerTaskInitializationListener (EagerTaskInitializationListener.java:run(83)) - Job initialization failed:
      java.lang.IllegalArgumentException: Network location name contains /: /default-rack
      at org.apache.hadoop.net.NodeBase.set(NodeBase.java:76)
      at org.apache.hadoop.net.NodeBase.<init>(NodeBase.java:57)
      at org.apache.hadoop.mapred.JobTracker.addHostToNodeMapping(JobTracker.java:2342)
      at org.apache.hadoop.mapred.JobTracker.resolveAndAddToTopology(JobTracker.java:2336)
      at org.apache.hadoop.mapred.JobInProgress.createCache(JobInProgress.java:344)
      at org.apache.hadoop.mapred.JobInProgress.initTasks(JobInProgress.java:441)
      at org.apache.hadoop.mapred.EagerTaskInitializationListener$InitJob.run(EagerTaskInitializationListener.java:81)
      at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
      at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
      at java.lang.Thread.run(Thread.java:619)

      When I changed CombineFileInputFormat to pass just rackname (without '/'), JT wrongly resolves the node as /default-rack/<rack-name>.

      Solution is to pass hostnames holding the block(on the rack), instead of rackname.

      1. patch-5759.txt
        13 kB
        Amareshwari Sriramadasu
      2. patch-5759-1.txt
        11 kB
        Amareshwari Sriramadasu
      3. patch-5759-2.txt
        11 kB
        Amareshwari Sriramadasu
      4. patch-5759-ydist.txt
        12 kB
        Amareshwari Sriramadasu

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            • Assignee:
              Amareshwari Sriramadasu
              Reporter:
              Amareshwari Sriramadasu
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              Dates

              • Created:
                Updated:
                Resolved:

                Development