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From "Luca Telloli (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HDFS-456) Problems with dfs.name.edits.dirs as URI
Date Fri, 17 Jul 2009 15:06:14 GMT

    [ https://issues.apache.org/jira/browse/HDFS-456?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12732568#action_12732568

Luca Telloli commented on HDFS-456:

To answer my own question, I run the test on trunk + HDFS-496 30 times consecutively, for
2 times. 
The first time it passed 12 times, and failed 18; the second time it failed 23 times and passed
7 times. 
In the second batch I saved the test logs and they all fail for the same error below, which
is the same error that makes the test fail with HDFS-396 reverted, so that I'd conclude that
this patch does not impact that test. The error seems related to something left open, and
I assume it's OS specific. 

Testcase: testReplicateLenMismatchedBlock took 1.984 sec
        Caused an ERROR
The requested operation cannot be performed on a file with a user-mapped section
java.io.IOException: The requested operation cannot be performed on a file with a user-mapped
section open
        at java.io.RandomAccessFile.setLength(Native Method)
        at org.apache.hadoop.hdfs.TestDatanodeBlockScanner.changeReplicaLength(TestDatanodeBlockScanner.java:419)
        at org.apache.hadoop.hdfs.TestReplication.changeBlockLen(TestReplication.java:424)
        at org.apache.hadoop.hdfs.TestReplication.testReplicateLenMismatchedBlock(TestReplication.java:403)

> Problems with dfs.name.edits.dirs as URI
> ----------------------------------------
>                 Key: HDFS-456
>                 URL: https://issues.apache.org/jira/browse/HDFS-456
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: name-node
>    Affects Versions: 0.21.0
>            Reporter: Konstantin Shvachko
>            Assignee: Luca Telloli
>             Fix For: 0.21.0
>         Attachments: failing-tests.zip, HDFS-456.patch, HDFS-456.patch, HDFS-456.patch,
> There are several problems with recent commit of HDFS-396.
> # It does not work with default configuration "file:///". Throws {{IllegalArgumentException}}.
> # *ALL* hdfs tests fail on Windows because "C:\mypath" is treated as an illegal URI.
Backward compatibility is not provided.
> # {{IllegalArgumentException}} should not be thrown within hdfs code because it is a
{{RuntimException}}. We should throw {{IOException}} instead. This was recently discussed
in another jira.
> # Why do we commit patches without running unit tests and test-patch? This is the minimum
requirement for a patch to qualify as committable, right?

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