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From "Sameer Paranjpye (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-308) Task Tracker does not handle the case of read only local dir case correctly
Date Thu, 28 Sep 2006 20:16:51 GMT
     [ http://issues.apache.org/jira/browse/HADOOP-308?page=all ]

Sameer Paranjpye updated HADOOP-308:
------------------------------------

    Component/s: mapred
    Description: 
In case that the local dir is not writable on a node, the tasks on the  node will fail as
expected, with an exception like:

(Read-only file system) at java.io.FileOutputStream.open(Native Method) 
at java.io.FileOutputStream.(FileOutputStream.java:179) 
at java.io.FileOutputStream.(FileOutputStream.java:131) 
at org.apache.hadoop.dfs.DFSClient$DFSOutputStream.(DFSClient.java:723) 
at org.apache.hadoop.dfs.DFSClient.create(DFSClient.java:241) 
at org.apache.hadoop.dfs.DistributedFileSystem.createRaw(DistributedFileSystem.java:96) 
at org.apache.hadoop.fs.FSDataOutputStream$Summer.(FSDataOutputStream.java:44) 
at org.apache.hadoop.fs.FSDataOutputStream.(FSDataOutputStream.java:134) 
at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:224) 
at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:176) 
....
at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:265) 
at org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:847)

However, the task tracker will continue accept new tasks and continue to fail.
The runloop of tasktracker should detect such a problem and exits.



  was:

In case that the local dir is not writable on a node, the tasks on the  node will fail as
expected, with an exception like:

(Read-only file system) at java.io.FileOutputStream.open(Native Method) 
at java.io.FileOutputStream.(FileOutputStream.java:179) 
at java.io.FileOutputStream.(FileOutputStream.java:131) 
at org.apache.hadoop.dfs.DFSClient$DFSOutputStream.(DFSClient.java:723) 
at org.apache.hadoop.dfs.DFSClient.create(DFSClient.java:241) 
at org.apache.hadoop.dfs.DistributedFileSystem.createRaw(DistributedFileSystem.java:96) 
at org.apache.hadoop.fs.FSDataOutputStream$Summer.(FSDataOutputStream.java:44) 
at org.apache.hadoop.fs.FSDataOutputStream.(FSDataOutputStream.java:134) 
at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:224) 
at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:176) 
....
at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:265) 
at org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:847)

However, the task tracker will continue accept new tasks and continue to fail.
The runloop of tasktracker should detect such a problem and exits.




> Task Tracker does not handle the case of read only local dir  case correctly
> ----------------------------------------------------------------------------
>
>                 Key: HADOOP-308
>                 URL: http://issues.apache.org/jira/browse/HADOOP-308
>             Project: Hadoop
>          Issue Type: Bug
>          Components: mapred
>    Affects Versions: 0.3.2
>         Environment: all
>            Reporter: Runping Qi
>
> In case that the local dir is not writable on a node, the tasks on the  node will fail
as expected, with an exception like:
> (Read-only file system) at java.io.FileOutputStream.open(Native Method) 
> at java.io.FileOutputStream.(FileOutputStream.java:179) 
> at java.io.FileOutputStream.(FileOutputStream.java:131) 
> at org.apache.hadoop.dfs.DFSClient$DFSOutputStream.(DFSClient.java:723) 
> at org.apache.hadoop.dfs.DFSClient.create(DFSClient.java:241) 
> at org.apache.hadoop.dfs.DistributedFileSystem.createRaw(DistributedFileSystem.java:96)

> at org.apache.hadoop.fs.FSDataOutputStream$Summer.(FSDataOutputStream.java:44) 
> at org.apache.hadoop.fs.FSDataOutputStream.(FSDataOutputStream.java:134) 
> at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:224) 
> at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:176) 
> ....
> at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:265) 
> at org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:847)
> However, the task tracker will continue accept new tasks and continue to fail.
> The runloop of tasktracker should detect such a problem and exits.

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