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From "Knut O. Hellan (JIRA)" <j...@apache.org>
Subject [jira] [Created] (YARN-527) Local filecache mkdir fails
Date Tue, 02 Apr 2013 08:55:16 GMT
Knut O. Hellan created YARN-527:
-----------------------------------

             Summary: Local filecache mkdir fails
                 Key: YARN-527
                 URL: https://issues.apache.org/jira/browse/YARN-527
             Project: Hadoop YARN
          Issue Type: Bug
          Components: nodemanager
    Affects Versions: 2.0.0-alpha
         Environment: RHEL 6.3 with CDH4.1.3 Hadoop, HA with two name nodes and six worker
nodes.
            Reporter: Knut O. Hellan
            Priority: Minor


Jobs failed with no other explanation than this stack trace:

2013-03-29 16:46:02,671 INFO [AsyncDispatcher event handler] org.apache.hadoop.mapreduce.v2.app.job.impl.TaskAttemptImpl:
Diag
nostics report from attempt_1364591875320_0017_m_000000_0: java.io.IOException: mkdir of /disk3/yarn/local/filecache/-42307893
55400878397 failed
        at org.apache.hadoop.fs.FileSystem.primitiveMkdir(FileSystem.java:932)
        at org.apache.hadoop.fs.DelegateToFileSystem.mkdir(DelegateToFileSystem.java:143)
        at org.apache.hadoop.fs.FilterFs.mkdir(FilterFs.java:189)
        at org.apache.hadoop.fs.FileContext$4.next(FileContext.java:706)
        at org.apache.hadoop.fs.FileContext$4.next(FileContext.java:703)
        at org.apache.hadoop.fs.FileContext$FSLinkResolver.resolve(FileContext.java:2333)
        at org.apache.hadoop.fs.FileContext.mkdir(FileContext.java:703)
        at org.apache.hadoop.yarn.util.FSDownload.call(FSDownload.java:147)
        at org.apache.hadoop.yarn.util.FSDownload.call(FSDownload.java:49)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
        at java.util.concurrent.FutureTask.run(FutureTask.java:138)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
        at java.util.concurrent.FutureTask.run(FutureTask.java:138)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
        at java.lang.Thread.run(Thread.java:662)

Manually creating the directory worked. This behavior was common to at least several nodes
in the cluster.

The situation was resolved by removing and recreating all /disk?/yarn/local/filecache directories
on all nodes.

It is unclear whether Yarn struggled with the number of files or if there were corrupt files
in the caches. The situation was triggered by a node dying.

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