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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