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https://issues.apache.org/jira/browse/YARN-2934?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15061908#comment-15061908
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Gera Shegalov commented on YARN-2934:
-------------------------------------
That should go to the exception message
{code}
422 } else if (listStatus.length > 1) {
423 LOG.warn("Multiple files in " + containerLogDir
424 + ", seems to match the error file name pattern configured ");
425 }
{code}
Don't do branching, pass the string builder diagnosticInfo and do something like
{code}
diagnosticInfo
.append("Error files: ")
.append(Arrays.toString(listStatus))
.append("\n")
.append("Last ").append(tailBytes).append(" bytes of
").append(listStatus[0])
.append(new String(tailBytes, UTF_8));
{code}
> Improve handling of container's stderr
> ---------------------------------------
>
> Key: YARN-2934
> URL: https://issues.apache.org/jira/browse/YARN-2934
> Project: Hadoop YARN
> Issue Type: Improvement
> Reporter: Gera Shegalov
> Assignee: Naganarasimha G R
> Priority: Critical
> Attachments: YARN-2934.v1.001.patch, YARN-2934.v1.002.patch,
> YARN-2934.v1.003.patch, YARN-2934.v1.004.patch, YARN-2934.v1.005.patch,
> YARN-2934.v1.006.patch, YARN-2934.v1.007.patch, YARN-2934.v1.008.patch
>
>
> Most YARN applications redirect stderr to some file. That's why when
> container launch fails with {{ExitCodeException}} the message is empty.
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