I missed this e-mail before. Just going through my inbox now.

This sounds like a common problem people hit with PyLucene. There's a bug in
the latest release (not sure if it's been fixed) where it can deadlock
Apache. I'm not sure what the fix is, or if downgrading will fix it. I think
in the next release, we need to start looking at a simpler (if slower)
search mechanism as an optional replacement for PyLucene.

Christian

-- 
Christian Hammond - chip...@chipx86.com
Review Board - http://www.review-board.org
VMware, Inc. - http://www.vmware.com


On Tue, Apr 7, 2009 at 5:17 AM, Vesterbaek <vesterb...@gmail.com> wrote:

>
> Hi,
>
> My setup:
> ubuntu 8.10
> Reviewboard 1.0 beta2
> apache2
> pylucene 2.4.1 (downloaded source from apache and built)
> python 2.5.2
>
> Problem:
> When executing a search in the web interface of reviewboard, apache
> hangs/deadlocks, using 100% cpu. Issue 770 seems to be about the same
> problem (http://code.google.com/p/reviewboard/issues/detail?id=770),
> but is has been closed.
>
> Doing an strace on apache reveals a lot of lines ala the ones below
> here with viewing e.g. viewing a diff (which seems to work fine
> dispite all this):
>
> #####  strace output begin ######
> 15981 open("/usr/lib/python2.5/site-packages/django_evolution-0.0.0-
> py2.5.egg/array.py", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such file
> or directory)
> 15981 open("/usr/lib/python2.5/site-packages/django_evolution-0.0.0-
> py2.5.egg/array.pyc", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such file
> or directory)
> 15981 stat64("/usr/lib/python2.5/site-packages/Django-1.0.2_final-
> py2.5.egg/array", 0xb6201f34) = -1 ENOENT (No such file or directory)
> ......
> 15981 open("/usr/lib/python2.5/site-packages/ReviewBoard-1.0beta2-
> py2.5.egg/uu.so", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such file or
> directory)
> 15981 open("/usr/lib/python2.5/site-packages/ReviewBoard-1.0beta2-
> py2.5.egg/uumodule.so", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such
> file or directory)
> 15981 open("/usr/lib/python2.5/site-packages/ReviewBoard-1.0beta2-
> py2.5.egg/uu.py", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such file or
> directory)
> 15981 open("/usr/lib/python2.5/site-packages/ReviewBoard-1.0beta2-
> py2.5.egg/uu.pyc", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such file or
> directory)
> 15981 stat64("/usr/lib/python2.5/site-packages/Pygments-1.0-py2.5.egg/
> uu", 0xb61fbd44) = -1 ENOENT (No such file or directory)
> 15981 open("/usr/lib/python2.5/site-packages/Pygments-1.0-py2.5.egg/
> uu.so", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> 15981 open("/usr/lib/python2.5/site-packages/Pygments-1.0-py2.5.egg/
> uumodule.so", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such file or
> directory)
> 15981 open("/usr/lib/python2.5/site-packages/Pygments-1.0-py2.5.egg/
> uu.py", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> 15981 open("/usr/lib/python2.5/site-packages/Pygments-1.0-py2.5.egg/
> uu.pyc", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> 15981 stat64("/usr/lib/python2.5/site-packages/Djblets-0.5beta1-
> py2.5.egg/uu", 0xb61fbd44) = -1 ENOENT (No such file or directory)
> 15981 open("/usr/lib/python2.5/site-packages/Djblets-0.5beta1-
> py2.5.egg/uu.so", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such file or
> directory)
> 15981 open("/usr/lib/python2.5/site-packages/Djblets-0.5beta1-
> py2.5.egg/uumodule.so", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such
> file or directory)
> 15981 open("/usr/lib/python2.5/site-packages/Djblets-0.5beta1-
> py2.5.egg/uu.py", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such file or
> directory)
> 15981 open("/usr/lib/python2.5/site-packages/Djblets-0.5beta1-
> py2.5.egg/uu.pyc", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such file or
> directory)
> 15981 stat64("/usr/lib/python2.5/site-packages/django_evolution-0.0.0-
> py2.5.egg/uu", 0xb61fbd44) = -1 ENOENT (No such file or directory)
> 15981 open("/usr/lib/python2.5/site-packages/django_evolution-0.0.0-
> py2.5.egg/uu.so", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such file or
> directory)
> 15981 open("/usr/lib/python2.5/site-packages/django_evolution-0.0.0-
> py2.5.egg/uumodule.so", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such
> file or directory)
> #####  strace output end ######
>
>
> When execute a search, apache2 hangs/deadlocks. strace reveals:
>
> #####  strace output begin ######
> 15981 open("/proc/self/maps", O_RDONLY) = 11
> 15981 fstat64(11, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
> 15981 mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|
> MAP_ANONYMOUS, -1, 0) = 0xa9762000
> 15981 read(11, 0xa9762000, 1024)        = -1 EACCES (Permission
> denied)
> 15981 read(11, 0xa9762000, 1024)        = -1 EACCES (Permission
> denied)
> 15981 read(11, 0xa9762000, 1024)        = -1 EACCES (Permission
> denied)
> 15981 read(11, 0xa9762000, 1024)        = -1 EACCES (Permission
> denied)
> 15981 read(11, 0xa9762000, 1024)        = -1 EACCES (Permission
> denied)
> 15981 read(11, 0xa9762000, 1024)        = -1 EACCES (Permission
> denied)
> 15981 read(11, 0xa9762000, 1024)        = -1 EACCES (Permission
> denied)
> 15981 read(11, 0xa9762000, 1024)        = -1 EACCES (Permission
> denied)
> 15981 read(11, 0xa9762000, 1024)        = -1 EACCES (Permission
> denied)
> 15981 read(11, 0xa9762000, 1024)        = -1 EACCES (Permission
> denied)
> 15981 read(11, 0xa9762000, 1024)        = -1 EACCES (Permission
> denied)
> 15981 read(11, 0xa9762000, 1024)        = -1 EACCES (Permission
> denied)
> 15981 read(11, 0xa9762000, 1024)        = -1 EACCES (Permission
> denied)
> 15981 read(11, 0xa9762000, 1024)        = -1 EACCES (Permission
> denied)
> 15981 read(11, 0xa9762000, 1024)        = -1 EACCES (Permission
> denied)
> #####  strace output end ######
>
> The "read - permission denied" lines are repeated forever until apache
> is shut down.
>
> Any ideas to what my problem might be?
>
> Thanks
>  -- Jeppe
> >
>

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