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https://issues.apache.org/jira/browse/LUCENE-5786?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14045776#comment-14045776
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ASF subversion and git services commented on LUCENE-5786:
---------------------------------------------------------
Commit 1606003 from [~dawidweiss] in branch 'dev/trunk'
[ https://svn.apache.org/r1606003 ]
LUCENE-5786: adding more debugging to the test framework.
> Unflushed/ truncated events file (hung testing subprocess)
> ----------------------------------------------------------
>
> Key: LUCENE-5786
> URL: https://issues.apache.org/jira/browse/LUCENE-5786
> Project: Lucene - Core
> Issue Type: Bug
> Components: general/test
> Reporter: Dawid Weiss
> Assignee: Dawid Weiss
>
> This has happened several times on Jenkins, typically on
> SSLMigrationTest.testDistribSearch, but probably on other tests as well.
> The symptom is: the test framework never terminates, it also reports an
> incorrect (?) hung test.
> The problem is that the actual forked JVM is hung on reading stdin, waiting
> for the next test suite (no test thread is present); the master process is
> hung on receiving data from the forked jvm (both the events file and stdout
> spill is truncated in the middle of a test). The last output is:
> {code}
> [
> "APPEND_STDERR",
> {
> "chunk": "612639 T30203 oasu.DefaultSolrCoreState.doRecovery Running
> recovery - first canceling any ongoing recovery%0A"
> }
> ]
> [
> "APPEND_STDERR"
> {code}
> Overall, it looks insane -- there are flushes after each test completes
> (normally or not), there are tests *following* the one that last reported
> output and before dynamic suites on stdin.
> I have no idea. The best explanation is insane -- looks like the test thread
> just died in the middle of executing Java code...
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