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From Robert Dionne <dio...@dionne-associates.com>
Subject Re: CouchDb not releasing files
Date Sat, 25 Sep 2010 12:35:24 GMT
Filipe,

  Won't terminate be called only if the gen_server is stopped for a reason?

Bob



On Sep 25, 2010, at 7:30 AM, Filipe David Manana wrote:

> Stephen,
> 
> I committed something to trunk (
> http://svn.apache.org/viewvc?view=revision&revision=1001196 ) that
> might be the cause for your issue.
> Can you test it with trunk?
> 
> I was not yet able to reproduce the issue.
> 
> cheers
> 
> On Wed, Sep 22, 2010 at 2:40 PM, [mRg] <emargee@gmail.com> wrote:
>> Yes I did, issued it a couple of times as I was trying to see if its was
>> some kind of race condition.
>> 
>> Have a site due to launch on Friday so have got crazy busy but ill post more
>> info when I have it, unless anyone else can try and help replicate this ?
>> 
>> On 20 September 2010 21:42, Paul Davis <paul.joseph.davis@gmail.com> wrote:
>> 
>>> Do you issue two compact commands simultaneously or wait for the first
>>> one to complete and then run the second?
>>> 
>>> 
>>> On Mon, Sep 20, 2010 at 4:07 PM, [mRg] <emargee@gmail.com> wrote:
>>>> Well I can certainly reproduce the issue, but am having trouble finding
>>> the
>>>> exact sequence (annoyingly of course)
>>>> 
>>>> 1> I started with a blank VM of Ubuntu 10.10 (ext3) running on virtualbox
>>>> with latest CouchDB (apt-get install couchdb)
>>>> 2> Began adding lots of blank docs ..  (curl -X POST -H
>>>> "Content-Type:application/json" http://localhost:5984/test -d {})
>>>> 3> Created a simple view ("function(doc) {  emit(null, doc); }") and ran
>>> to
>>>> ensure it wrote to disk.
>>>> 4> I issued 2 compact commands (curl -X POST
>>>> http://localhost:5984/test/_compact/ -H "Content-Type:application/json")
>>>> 5> And began adding more documents again as before ..
>>>> 
>>>> Repeating this, essentially creating view data and compacting it about 10
>>>> times resulted in 4 'snagged' files
>>>> 
>>>> root@ubuntu:~# lsof | grep -P 'COMMAND|/var/lib/couchdb/1.0.1'
>>>> COMMAND    PID    USER   FD      TYPE     DEVICE SIZE/OFF       NODE NAME
>>>> beam      1083 couchdb   13u      REG      252,0     4185        271
>>>> /var/lib/couchdb/1.0.1/_users.couch
>>>>>> beam      1083 couchdb   14u      REG      252,0   331865       
275
>>>> /var/lib/couchdb/1.0.1/.delete/4e000e0ae5cce3d275f09b4542396e85 (deleted)
>>>>>> beam      1083 couchdb   16u      REG      252,0   602210       
279
>>>> /var/lib/couchdb/1.0.1/.delete/a9ee2b96c12591455ea795fa5324dc9c (deleted)
>>>> beam      1083 couchdb   17u      REG      252,0   270434        283
>>>> /var/lib/couchdb/1.0.1/.test_design/07ca32cf9b0de9c915c5d9ce653cdca3.view
>>>> beam      1083 couchdb   18u      REG      252,0   204898        284
>>>> /var/lib/couchdb/1.0.1/.test_design/540958c4124af3925fe467afb96f4906.view
>>>> beam      1083 couchdb   20u      REG      252,0   405602        286
>>>> /var/lib/couchdb/1.0.1/.test_design/f26a8fcc3d2ce226a9e652338882c3db.view
>>>> beam      1083 couchdb   21u      REG      252,0   299106        287
>>>> /var/lib/couchdb/1.0.1/.test_design/40614f8c8e1b4bab9d093881e914729d.view
>>>>>> beam      1083 couchdb   22u      REG      252,0   106594       
285
>>>> /var/lib/couchdb/1.0.1/.delete/31909e936ce94db7a6cede72827b18b2 (deleted)
>>>>>> beam      1083 couchdb   24r      REG      252,0   233570       
288
>>>> /var/lib/couchdb/1.0.1/.delete/83d09ec6dab90ca6078c0310085b97cc (deleted)
>>>> beam      1083 couchdb   26u      REG      252,0   163932        281
>>>> /var/lib/couchdb/1.0.1/.test_design/3486e8de398e27b8767afd4975691360.view
>>>> beam      1083 couchdb   27w      REG      252,0   114786        289
>>>> /var/lib/couchdb/1.0.1/test.couch
>>>> beam      1083 couchdb   28u      REG      252,0   217186        280
>>>> /var/lib/couchdb/1.0.1/.test_design/b450740e3245f89ab902db10d767a397.view
>>>> 
>>>> .. while the bottom 2 marked with (deleted) hung around for about 20
>>> minutes
>>>> they eventually disappeared ..
>>>> 
>>>> root@ubuntu:~# lsof | grep -P 'COMMAND|/var/lib/couchdb/1.0.1'
>>>> COMMAND    PID    USER   FD      TYPE     DEVICE SIZE/OFF       NODE NAME
>>>> beam      1083 couchdb   13u      REG      252,0     4185        271
>>>> /var/lib/couchdb/1.0.1/_users.couch
>>>>>> beam      1083 couchdb   14u      REG      252,0   331865       
275
>>>> /var/lib/couchdb/1.0.1/.delete/4e000e0ae5cce3d275f09b4542396e85 (deleted)
>>>>>> beam      1083 couchdb   16u      REG      252,0   602210       
279
>>>> /var/lib/couchdb/1.0.1/.delete/a9ee2b96c12591455ea795fa5324dc9c (deleted)
>>>> beam      1083 couchdb   17u      REG      252,0   270434        283
>>>> /var/lib/couchdb/1.0.1/.test_design/07ca32cf9b0de9c915c5d9ce653cdca3.view
>>>> beam      1083 couchdb   18u      REG      252,0   204898        284
>>>> /var/lib/couchdb/1.0.1/.test_design/540958c4124af3925fe467afb96f4906.view
>>>> beam      1083 couchdb   20u      REG      252,0   405602        286
>>>> /var/lib/couchdb/1.0.1/.test_design/f26a8fcc3d2ce226a9e652338882c3db.view
>>>> beam      1083 couchdb   21u      REG      252,0   299106        287
>>>> /var/lib/couchdb/1.0.1/.test_design/40614f8c8e1b4bab9d093881e914729d.view
>>>> beam      1083 couchdb   23u      REG      252,0   114786        288
>>>> /var/lib/couchdb/1.0.1/test.couch
>>>> beam      1083 couchdb   26u      REG      252,0   163932        281
>>>> /var/lib/couchdb/1.0.1/.test_design/3486e8de398e27b8767afd4975691360.view
>>>> beam      1083 couchdb   28u      REG      252,0   217186        280
>>>> /var/lib/couchdb/1.0.1/.test_design/b450740e3245f89ab902db10d767a397.view
>>>> 
>>>> .. but the top 2 did not and are still hanging around over an hour later
>>> ..
>>>> 
>>>> I will keep looking to see if I can find the exact sequence ..
>>>> 
>>>> On 20 September 2010 19:09, [mRg] <emargee@gmail.com> wrote:
>>>> 
>>>>> I am trying to reproduce it currently on a fresh VM. It seems to be a
>>>>> symptom of view compaction, after the file is moved to the .delete
>>> directory
>>>>> and then finally deleted is where the problem seems to occur.
>>>>> 
>>>>> I tried with a fresh ubuntu 10.10 but I couldnt reproduce but the system
>>>>> I'm seeing it on is ext3 (ubuntu was ext4) so I'm going to start again
>>> with
>>>>> that and report back.
>>>>> 
>>>>> I did wonder how this would be reproduced in a test as you have to get
>>>>> quite low level (using lsof) to see if the issue is manifesting itself
>>> :)
>>>>> 
>>>>> Regards
>>>>> 
>>>>> Stephen
>>>>> 
>>>>> On 20 September 2010 16:00, Chris Anderson <jchris@apache.org>
wrote:
>>>>> 
>>>>>> On Sun, Sep 19, 2010 at 3:21 PM, Randall Leeds <
>>> randall.leeds@gmail.com>
>>>>>> wrote:
>>>>>>> If the bug is confirmed it should be on JIRA if it is not already.
If
>>>>>>> you have a test case that reproduces it that would be fanstastic
>>>>>>> (bonus points for a JS test in Futon).
>>>>>>> 
>>>>>>> It's my opinion something this serious should block 1.1, but
>>>>>>> ultimately that is up to the committers to determine, yes?
>>>>>>> 
>>>>>> 
>>>>>> I think this is pretty serious. It's probably a simple fix, so as
soon
>>>>>> as we have it reproducible, I'm sure it will get fixed.
>>>>>> 
>>>>>> I'm not sure how it can be tested from JavaScript, any ideas?
>>>>>> 
>>>>>> If not it should be testable via the Erlang tests.
>>>>>> 
>>>>>> Chris
>>>>>> 
>>>>>>> On Sun, Sep 19, 2010 at 22:09, [mRg] <emargee@gmail.com>
wrote:
>>>>>>>> Hi all,
>>>>>>>> 
>>>>>>>> This is just a cross-post to highlight a thread on the user
list.
>>> (with
>>>>>> the
>>>>>>>> same name as this one - all details etc are on there, happy
to
>>> repeat
>>>>>> here
>>>>>>>> if needed). It seems this problem was discussed by some devs
at
>>>>>> CouchCamp
>>>>>>>> and seems others are suffering this issue. I was just wondering
if
>>>>>> there was
>>>>>>>> a JIRA issue related to this that I/we can track and if a
fix for
>>> this
>>>>>> will
>>>>>>>> be included in any upcoming released (1.1 ?).
>>>>>>>> 
>>>>>>>> Regards
>>>>>>>> 
>>>>>>>> Stephen
>>>>>>>> 
>>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> --
>>>>>> Chris Anderson
>>>>>> http://jchrisa.net
>>>>>> http://couch.io
>>>>>> 
>>>>> 
>>>>> 
>>>> 
>>> 
>> 
> 
> 
> 
> -- 
> Filipe David Manana,
> fdmanana@gmail.com, fdmanana@apache.org
> 
> "Reasonable men adapt themselves to the world.
>  Unreasonable men adapt the world to themselves.
>  That's why all progress depends on unreasonable men."


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