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Date: Fri, 21 Oct 2011 20:50:33 +0000 (UTC)
From: "Ted Yu (Commented) (JIRA)" <jira@apache.org>
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Subject: [jira] [Commented] (HBASE-4634) "test.build.data" property overused
 leading to write data at the wrong place
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    [ https://issues.apache.org/jira/browse/HBASE-4634?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13133048#comment-13133048 ] 

Ted Yu commented on HBASE-4634:
-------------------------------

TestHFileBlock#testBlockHeapSize is fixed by addendum to HBASE-4219
Please refresh your workspace.
                
> "test.build.data" property overused leading to write data at the wrong place
> ----------------------------------------------------------------------------
>
>                 Key: HBASE-4634
>                 URL: https://issues.apache.org/jira/browse/HBASE-4634
>             Project: HBase
>          Issue Type: Bug
>          Components: test
>    Affects Versions: 0.92.0
>         Environment: all
>            Reporter: nkeywal
>            Assignee: nkeywal
>         Attachments: 2011020_4634_all.patch, 20111020_4639_TestStoreFile.patch, 20111021_4634_all.v2.patch
>
>
> "test.build.data" is overloaded in HBase.At the beginning, it's the "Default parent directory for test output.", but then it's rewritten to be the directory itself in functions like HBaseTestingUtility#startMiniDFSCluster
> It seems that this value is already used by MiniDFS (i.e. outside of HBase): 
> "Name is as it is because mini dfs has hard-codings to put test data here."
> As it is today, there is at least a bug in HBaseTestingUtility:
> {noformat}
>   public void initTestDir() {
>     if (System.getProperty(TEST_DIRECTORY_KEY) == null) {
>       clusterTestBuildDir = setupClusterTestBuildDir();
>       System.setProperty(TEST_DIRECTORY_KEY, clusterTestBuildDir.getPath());
>     }
>   }
> {noformat}
> if you set a value for "test.build.data", the test dir will be the parent directory and not a temp subdir, leading to issues as multiple tests will end-ups in the same (bad) directory. This function is barely used today, hence it's not visible, but I would like to use it in some new code.
> A possible fix is to remove the check for null and continue with the overloading, but I don't think it would be a big issue to create a new key(like "test.build.data.rootdirectory") specific to the root directory and to use "test.build.data" only to communicate with MiniDFS. Feedback welcome.

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