http://erldocs.com/otp_src_R13B/stdlib/gen_server.html
If the function returns {stop,Reason,Reply,NewState}, Reply will be given back
to From. If the function returns {stop,Reason,NewState}, any reply to From must
be given explicitly using gen_server:reply/2. The gen_server will then call
Module:terminate(Reason,NewState)and terminate.
On Sep 25, 2010, at 10:53 AM, Paul Davis wrote:
> I'm not aware of a case where a gen_server will stop without calling
> terminate except if its a hard VM shutdown. Though, I get the feeling
> that Kocoloski is going to remind me of a case I've seen before and
> I'll say "Oh duh!" and then move on with my life.
>
> HTH,
> Paul Davis
>
> On Sat, Sep 25, 2010 at 8:35 AM, Robert Dionne
> <[email protected]> wrote:
>> 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] <[email protected]> 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 <[email protected]> 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] <[email protected]> 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
>>>>>>
>>>>>> r...@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 ..
>>>>>>
>>>>>> r...@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] <[email protected]> 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 <[email protected]> wrote:
>>>>>>>
>>>>>>>> On Sun, Sep 19, 2010 at 3:21 PM, Randall Leeds <
>>>>> [email protected]>
>>>>>>>> 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] <[email protected]> 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,
>>> [email protected], [email protected]
>>>
>>> "Reasonable men adapt themselves to the world.
>>> Unreasonable men adapt the world to themselves.
>>> That's why all progress depends on unreasonable men."
>>
>>
