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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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Hoss Man updated SOLR-5652:
---------------------------
Description:
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 (although sarowe was able to trigger a similar, non-reproducible
seed, failure on his machine)
Using this as a tracking issue to try and make sense of it.
Summary of things noticed so far (in 3 failures):
* So far only seen on http://jenkins.thetaphi.de & sarowe's mac
* 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 doing a "desc" sorting on one of the "\*_dv_last" or
"\*_dv_first" fields (docValues=true, either sortMissingLast=true OR
sortMissingFirst=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)
was:
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)
updating description based on variables seen in sarowe's failure
> 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 (although sarowe was able to trigger a similar,
> non-reproducible seed, failure on his machine)
> Using this as a tracking issue to try and make sense of it.
> Summary of things noticed so far (in 3 failures):
> * So far only seen on http://jenkins.thetaphi.de & sarowe's mac
> * 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 doing a "desc" sorting on one of the "\*_dv_last" or
> "\*_dv_first" fields (docValues=true, either sortMissingLast=true OR
> sortMissingFirst=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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