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https://issues.apache.org/jira/browse/MAPREDUCE-6560?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Rohith Sharma K S moved YARN-4394 to MAPREDUCE-6560:
----------------------------------------------------
Key: MAPREDUCE-6560 (was: YARN-4394)
Project: Hadoop Map/Reduce (was: Hadoop YARN)
> ClientServiceDelegate doesn't handle retries during AM restart as intended
> --------------------------------------------------------------------------
>
> Key: MAPREDUCE-6560
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-6560
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Reporter: Daniel Templeton
> Assignee: Daniel Templeton
>
> In the {{invoke()}} method, I found the following code:
> {code}
> private AtomicBoolean usingAMProxy = new AtomicBoolean(false);
> ...
> // if it's AM shut down, do not decrement maxClientRetry as we wait
> for
> // AM to be restarted.
> if (!usingAMProxy.get()) {
> maxClientRetry--;
> }
> usingAMProxy.set(false);
> {code}
> When we create the AM proxy, we set the flag to true. If we fail to connect,
> the impact of the flag being true is that the code will try one extra time,
> giving it 400ms instead of just 300ms. I can't imagine that's the intended
> behavior. After any failure, the flag will forever more be false, but
> fortunately (?!?) the flag is otherwise unused.
> Looks like I need to do some archeology to figure out how we ended up here.
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