[SOLR-5671] Heisenbug #2 in DistribCursorPagingTest: full walk returns one fewer doc than expected

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 4.7
• Fix Version/s: 4.7, 6.0
• Assignee: Unassigned
• Reporter: Steven Rowe
• Created: 27/Jan/14 15:03
• Updated: 09/May/16 18:51
• Resolved: 10/Feb/14 18:48

Description

Twice on Uwe's Jenkins, DistribCursorPagingTest has paged through a small number of indexed docs and retrieved one fewer doc than the number of indexed docs. Both of these failures were on trunk on Windows:

http://jenkins.thetaphi.de/job/Lucene-Solr-trunk-Windows/3708/
http://jenkins.thetaphi.de/job/Lucene-Solr-trunk-Windows/3713/

I've also seen this twice on trunk on my OS X laptop (out of 875 trials).

None of the seeds have reproduced for me.

All the failures were using either Lucene41 or Lucene42 codec

Issue Links

• duplicates: SOLR-5652 Heisenbug in DistribCursorPagingTest: "walk already seen ..."
• relates to: SOLR-5463 Provide cursor/token based "searchAfter" support that works with arbitrary sorting (ie: "deep paging")