[jira] [Created] (PIG-3780) Tez mini cluster tests run for a very long time with TezSession reuse on

["Cheolsoo Park (JIRA)" <ji...@apache.org>]

Cheolsoo Park created PIG-3780:
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             Summary: Tez mini cluster tests run for a very long time with TezSession reuse on
                 Key: PIG-3780
                 URL: https://issues.apache.org/jira/browse/PIG-3780
             Project: Pig
          Issue Type: Sub-task
          Components: tez
    Affects Versions: tez-branch
            Reporter: Cheolsoo Park
            Assignee: Cheolsoo Park
             Fix For: tez-branch


In the current tez branch, mini cluster unit tests are very slow. The reason is as follows:
* TezSession reuse is by default on.
* Each test case runs, and it waits for Tez AM to terminate.
*  After Tez AM times out (usually after several minutes), another test case runs.

Two questions that I have are:
# Why doesn't TezSession reuse work in mini cluster?
# Why is TezSession reuse not disabled in some tests (e.g. TestAccumulator) where we explicitly set "tez.session.reuse" to false?

As for #2, I realized that "tez.session.reuse" was never set in the properties object that is passed to PigServer. I am going to upload a patch that fixes this problem in this jira.

As for #1, I don't have an answer yet. But I think we can fix this in a separate jira once we get Tez unit tests working again.





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