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From Damien Katz <dam...@apache.org>
Subject Re: 1.0 Vote
Date Thu, 01 Jul 2010 21:20:55 GMT
I think I've fixed the windows file issues and the occasional hang (happens when erlang fails
to restart fast enough, it shut's itself down). I switched to launching using werl instead
of erl, which fixes the problem. For production use, erl can still be used just fine, _restart
isn't supposed to be used in production.

Mark, can you verify it's fixed on your end?

-Damien

 
On Jun 27, 2010, at 9:38 PM, Juhani Ränkimies wrote:

> On Sun, Jun 27, 2010 at 9:10 AM, Mark Hammond <skippy.hammond@gmail.com> wrote:
>> On 27/06/2010 12:01 PM, Damien Katz wrote:
>>> 
>>> Mark, looks like it's the file:sync calls. Can you try this patch?
>>> 
>>> Index: src/couchdb/couch_file.erl
>>> ===================================================================
>>> --- src/couchdb/couch_file.erl  (revision 957790)
>>> +++ src/couchdb/couch_file.erl  (working copy)
>>> @@ -148,7 +148,7 @@
>>>  %%----------------------------------------------------------------------
>>> 
>>>  sync(Filepath) when is_list(Filepath) ->
>>> -    {ok, Fd} = file:open(Filepath, [read, raw]),
>>> +    {ok, Fd} = file:open(Filepath, [write, raw]),
>>>      try file:sync(Fd) after file:close(Fd) end;
>>>  sync(Fd) ->
>>>      gen_server:call(Fd, sync, infinity).
>> 
>> I made that patch and it looked good for a while.  The 'all_docs' test
>> passes, but the 'basics' test fails with the traceback at
>> http://pastebin.com/6ZZU8B6q.  As you will see at the end, couch itself
>> stopped, so no other requests could be made.
>> 
>> Attempting to restart couch then failed with a similar traceback at it comes
>> up - http://pastebin.com/4A1QEDq3.  My reading of it is that the DB is
>> somehow corrupted (it can't find a valid header).  If I stop couch, delete
>> all .couch files from the file-system and restart, it starts up fine again
>> and re-attempting the 'basics' test does exactly the same thing again.
>> 
>> Note that all the above was after re-enabling the auth database, but I don't
>> think the problem is related to that specifically.
>> 
>> Mark
>> 
> 
> Opening in append mode in sync/1 helps for 'basics' test. But there is
> still something wrong. The server hangs in different tests when trying
> to 'Run All'.
> 
> diff --git a/src/couchdb/couch_file.erl b/src/couchdb/couch_file.erl
> index 8c82272..6671bcc 100644
> --- a/src/couchdb/couch_file.erl
> +++ b/src/couchdb/couch_file.erl
> @@ -148,7 +148,7 @@ truncate(Fd, Pos) ->
> %%----------------------------------------------------------------------
> 
> sync(Filepath) when is_list(Filepath) ->
> -    {ok, Fd} = file:open(Filepath, [read, raw]),
> +    {ok, Fd} = file:open(Filepath, [append, raw]),
>     try file:sync(Fd) after file:close(Fd) end;
> sync(Fd) ->
>     gen_server:call(Fd, sync, infinity).
> 
> 
> -juhani


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