[jira] [Created] (LUCENE-6813) OfflineSorter.sort isn't thread-safe

["Michael McCandless (JIRA)" <ji...@apache.org>]

Michael McCandless created LUCENE-6813:
------------------------------------------

             Summary: OfflineSorter.sort isn't thread-safe
                 Key: LUCENE-6813
                 URL: https://issues.apache.org/jira/browse/LUCENE-6813
             Project: Lucene - Core
          Issue Type: Bug
            Reporter: Michael McCandless
            Assignee: Michael McCandless
             Fix For: Trunk, 5.4


The new BKD tree classes, and NumericRangeTree (just a 1D BKD tree),
make heavy use of OfflineSorter to build their data structures at
indexing time when the number of indexed documents is biggish.

But when I was first building them (LUCENE-6477), I hit a thread
safety issue in OfflineSorter, and at that time I just worked around
it by creating my own private temp directory each time I need to write
a BKD tree.

This workaround is sort of messy, and it causes problems with "pending
delete" files on Windows when we try to remove that temp directory,
causing test failures like http://jenkins.thetaphi.de/job/Lucene-Solr-5.x-Windows/5149/

I think instead we should fix the root cause ... i.e. make
OfflineSorter thread safe.  It looks like it's simple...

Separately I'd like to somehow fix these BKD tests to catch any leaked
file handles ... I'm not sure they are today.




--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscribe@lucene.apache.org
For additional commands, e-mail: dev-help@lucene.apache.org