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https://issues.apache.org/jira/browse/SOLR-5652?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Steve Rowe updated SOLR-5652:
-----------------------------
Attachment: 129.log
On OS X Mavericks with Apple Java 1.6.0_65 on branch_4x I ran {{ant
-Dtestcase=DistribCursorPaginTest}} in {{solr/core/}} in a bash loop to try to
find failures with reproducible seeds. Out of a little over 400 trials, 5
failed.
Below is the repro line from one I picked at random (trial #129) to attempt to
reproduce. I've re-run it six times, and the failure reproduced the first
time, but the test succeeded each of the following five times. (I tried a
seventh time, but performed {{ant clean}} at the top-level directory first, and
it still didn't reproduce.)
{noformat}
ant test -Dtestcase=DistribCursorPagingTest -Dtests.method=testDistribSearch
-Dtests.seed=55FB0127DC22CD98 -Dtests.slow=true -Dtests.locale=en_AU
-Dtests.timezone=Atlantic/Madeira -Dtests.file.encoding=US-ASCII
{noformat}
I'm attaching the test log ({{129.log}}) from the original failure with the
above seed.
> Heisenbug in DistribCursorPagingTest: "walk already seen ..."
> -------------------------------------------------------------
>
> Key: SOLR-5652
> URL: https://issues.apache.org/jira/browse/SOLR-5652
> Project: Solr
> Issue Type: Bug
> Reporter: Hoss Man
> Assignee: Hoss Man
> Attachments: 129.log,
> jenkins.thetaphi.de_Lucene-Solr-4.x-MacOSX_1200.log.txt,
> jenkins.thetaphi.de_Lucene-Solr-4.x-MacOSX_1217.log.txt
>
>
> Twice now, Uwe's jenkins has encountered a "walk already seen ..." assertion
> failure from DistribCursorPagingTest that I've been unable to fathom, let
> alone reproduce.
> Using this as a tracking issue to try and make sense of it.
> Summary of things noticed so far (in 2 failures):
> * So far only seen on http://jenkins.thetaphi.de
> * So far only seen on MacOSX
> * So far only seen on branch 4x
> * So far seen on both Java6 and Java7
> * fails occured in first block of randomized testing:
> ** we've indexed a small number of randomized docs
> ** we're explicitly looping over every field and sorting in both directions
> * fails were both when sorting on one of the "\*_dv_last desc" fields
> (docValues=true, sortMissingLast=true)
> ** sort on same field asc has always worked fine just before this (fields are
> in arbitrary order, but "asc" always tried before "desc")
> ** sorting on some other random fields has sometimes been tried before this
> and worked
> (specifics of each failure seen in the wild recorded in comments)
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