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Date: Mon, 5 Sep 2011 06:01:12 +0000 (UTC)
From: "Jonathan Hsieh (JIRA)" <jira@apache.org>
To: issues@hbase.apache.org
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Subject: [jira] [Commented] (HBASE-4326) Tests that use
 HBaseTestingUtility.startMiniCluster(n) should shutdown with
 HBaseTestingUtility.shutdownMiniCluster.
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    [ https://issues.apache.org/jira/browse/HBASE-4326?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13097022#comment-13097022 ] 

Jonathan Hsieh commented on HBASE-4326:
---------------------------------------

Hm.. looks like this actually done, but apache jenkins truncates the data so that it is not available from the build's logs.  I've noticed some similar flaky test failures on my side and will do some runs to try to duplicate failures and  that keeps the full stdout/logs so we can debug.

> Tests that use HBaseTestingUtility.startMiniCluster(n) should shutdown with HBaseTestingUtility.shutdownMiniCluster.
> --------------------------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-4326
>                 URL: https://issues.apache.org/jira/browse/HBASE-4326
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 0.90.4
>            Reporter: Jonathan Hsieh
>
> Most tests that use mini clusters use this pattern
> {code}
>  private final static HBaseTestingUtility UTIL = new HBaseTestingUtility();
>   @BeforeClass
>   public static void beforeClass() throws Exception {
>     UTIL.startMiniCluster(1);
>   }
>   @AfterClass
>   public static void afterClass() throws IOException {
>     UTIL.shutdownMiniCluster();
>   }
> {code}
> Some tests (like hbase-4269)
> {code}
>   @BeforeClass
>   public static void beforeClass() throws Exception {
>     UTIL.startMiniCluster(1);
>   }
>   @AfterClass
>   public static void afterClass() throws IOException {
>     UTIL.getMiniCluster().shutdown();
>     // or UTIL.shutdownMiniHBaseCluster();
>     // and likely others.
>   }
> {code}
> There is a difference between the two shutdown -- the former deletes files created during the tests while the latter does not.  This funny state persisting (zk or hbase/mr data) may be the cause of strange inter-testcase problems when full suites are run.

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