[LUCENENET-521] Concurrency bug with MMapDirectory

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Lucene.Net 3.0.3
• Fix Version/s: Lucene.Net 4.8.0
• Component/s: Lucene.Net Core

Environment

Visual Studio 2012, Lucene.Net 3.0.3 via Nudget, Windows 8 64bit, 4GB DDR3

• Assignee: Unassigned
• Reporter: Tamas Varga
• Created: 02/May/13 13:43
• Updated: 13/Jul/17 18:40
• Resolved: 13/Jul/17 18:40

Description

It seems like mmapdirectory doesnt handle concurrency
this works fine: http://pastebin.com/EQx0L23K

This:http://pastebin.com/ay6B2Krp (note that the only diff is, that i changed the FsDirectory.Open(newDirInfo) to new MMapDirectory(newDirinfo) in line 12 )
fails with exception:
{System.ArgumentOutOfRangeException: Index was out of range. Must be non-2negative and less than the size of the collection.
Full exception here: http://pastebin.com/erZTxH3d

If in the second code example I set the concurrentTaskCount to 1, everything is just fine.

Looks like a concurrency bug for me. Am I missing something?

T

Edit: I attached to content of the newMMap folder, after the index is created