Bug 692599 - 389 DS deadlocks when mass-adding users from multiple processes
Summary: 389 DS deadlocks when mass-adding users from multiple processes
Keywords:
Status: CLOSED DUPLICATE of bug 692690
Alias: None
Product: Fedora
Classification: Fedora
Component: 389-ds-base
Version: rawhide
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: ---
Assignee: Rich Megginson
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2011-03-31 16:40 UTC by Stephen Gallagher
Modified: 2011-04-25 23:27 UTC (History)
5 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Virtual Machine (8 CPUs) running Fedora 14 i686
Last Closed: 2011-04-12 01:04:23 UTC
Type: ---

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Description Stephen Gallagher 2011-03-31 16:40:39 UTC 
Description of problem:
I needed to add fifty thousand users to my DS for testing purposes. I generated five separate LDIF files with ten thousand users in each and ran ldapmodify from separate processes on the localhost. (This was intended to take advantage of more processors, as I had eight available)

This worked for a few hundred users before 389 DS became completely unresponsive. None of the five processes reported users being added, and the error_log had nothing to say. I straced the dirsrv process and saw what appeared to be a tight-loop calling poll().

I had to kill -9 the server in order to get it back. 'service dirsrv restart' hung as well.

Version-Release number of selected component (if applicable):
389-ds-base-1.2.8-0.2.a2.fc14.i686

How reproducible:
Irregular

Steps to Reproduce:
See description
  
Actual results:
Directory server was hung.

Expected results:
All fifty thousand users should have been added

Additional info:
Comment 1 Nathan Kinder 2011-04-11 21:32:45 UTC 
Stephen - Is this the same issue as bug #692690?
Comment 2 Stephen Gallagher 2011-04-12 01:04:23 UTC 
Yes, I believe it is.

*** This bug has been marked as a duplicate of bug 692690 ***
Comment 3 Nalin Dahyabhai 2011-04-12 13:10:31 UTC 
Are you sure?  Bug #692690 isn't a deadlock so much as a a-server-thread's-really-busy-right-now which happens to last a long time.
Comment 4 Stephen Gallagher 2011-04-12 13:15:51 UTC 
Well, I suppose it could be considered a separate issue that slapi-nis taking forever in one thread is causing all other threads to block would be a separate issue.

So yeah, I guess we should reopen this.
Comment 5 Rich Megginson 2011-04-12 14:39:16 UTC 
(In reply to comment #4)
> Well, I suppose it could be considered a separate issue that slapi-nis taking
> forever in one thread is causing all other threads to block would be a separate
> issue.
> 
> So yeah, I guess we should reopen this.

Does it cause all operations to block?
Comment 6 Stephen Gallagher 2011-04-12 14:40:33 UTC 
(In reply to comment #5)
> (In reply to comment #4)
> > Well, I suppose it could be considered a separate issue that slapi-nis taking
> > forever in one thread is causing all other threads to block would be a separate
> > issue.
> > 
> > So yeah, I guess we should reopen this.
> 
> Does it cause all operations to block?

Yes. Once I was in the state described by bug 692690 I could not perform any search, modify, etc.
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