[jira] [Created] (TWILL-103) YarnTwillRunnerService lookup() fails to find application if called immediately after startAndWait()

["Mike Walch (JIRA)" <ji...@apache.org>]

Mike Walch created TWILL-103:
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             Summary: YarnTwillRunnerService lookup() fails to find application if called immediately after startAndWait()
                 Key: TWILL-103
                 URL: https://issues.apache.org/jira/browse/TWILL-103
             Project: Apache Twill
          Issue Type: Bug
          Components: yarn
    Affects Versions: 0.3.0-incubating, 0.4.0-incubating, 0.5.0-incubating
            Reporter: Mike Walch


While TwillRunnerService.startAndWait() requests application/controller state from Zookeeper, there may be a delay in retrieving this state.  This can cause subsequent lookup() calls to return null even if there is a Twill application running.  

While this can be prevented by adding a one second sleep after startAndWait() is called, it would be better if startAndWait() was modifed to not return until all  state has been retrieved from Zookeeper. 



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