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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-13004) Make possible to explain why HBaseTestingUtility.waitFor fails
Date Tue, 10 Feb 2015 20:08:12 GMT

    [ https://issues.apache.org/jira/browse/HBASE-13004?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14314815#comment-14314815
] 

Hudson commented on HBASE-13004:
--------------------------------

SUCCESS: Integrated in HBase-1.1 #163 (See [https://builds.apache.org/job/HBase-1.1/163/])
HBASE-13004 Addendum fixes timeout value in message (Andrey Stepachev) (tedyu: rev 968c4574d779b569b1d70b929c47b8a6b244fc4b)
* hbase-common/src/test/java/org/apache/hadoop/hbase/Waiter.java


> Make possible to explain why HBaseTestingUtility.waitFor fails
> --------------------------------------------------------------
>
>                 Key: HBASE-13004
>                 URL: https://issues.apache.org/jira/browse/HBASE-13004
>             Project: HBase
>          Issue Type: Bug
>          Components: test
>    Affects Versions: 1.0.0, 2.0.0
>            Reporter: Andrey Stepachev
>            Assignee: Andrey Stepachev
>            Priority: Minor
>             Fix For: 2.0.0, 1.1.0
>
>         Attachments: HBASE-13004-branch-1.patch, HBASE-13004-branch-1.patch, HBASE-13004.patch,
HBASE-13004.patch, master-addendum.patch
>
>
> HBaseTestingUtility has good methods for waiting conditions, but with one drawback, when
waitfor fails, there is no way to explain what happened (fail() called from internals and
that is not very easy to intercept and explain state of failure).
> That would be great to have enhanced Predicate which can explain state after it failed
to wait for.
> That can looks like
> {code}
> HBaseTestingUtility.waitFor(10000, new ExplainingPredicate() {
>    boolean evaluate() {
>      ... some evaluation code
>    }
>    String explain() {
>     ... generate brief explanation of what to be expected, but not happened
>    }
> }
> {code}



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