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From Shaun Lindsay <sh...@meebo.com>
Subject strange couch error under load
Date Fri, 27 Mar 2009 19:52:44 GMT
Hey all,

We've been seeing this strange error in the couch logs and we're not sure what to make of
it.  It seems like once this error starts happening, it continues to occur and corresponds
to a general unresponsiveness of that particular couch node.  My first thought was that it
was running out of file descriptors, but that doesn't seem to be the case (it still happens
with a very high ulimit).

In this error the database it's trying to open is 'profiles22', but the error doesn't seem
tied to a particular database (we see it happening on all of our profiles shards).

We built this couch instance from trunk r713244, if that helps.

Anyone have any insight on what's going on?
[Fri, 27 Mar 2009 18:21:42 GMT] [error] [<0.14547.0>] {error_report,<0.21.0>,
    {<0.14547.0>,crash_report,
     [[{pid,<0.14547.0>},
       {registered_name,[]},
       {error_info,
           {exit,
               {timeout,
                   {gen_server,call,
                       [couch_server,{open,<<"profiles22">>,[{creds,{[]}}]}]}},
               [{gen_server,call,2},
                {couch_httpd_db,do_db_req,2},
                {couch_httpd,handle_request,3},
                {mochiweb_http,headers,4},
                {proc_lib,init_p,5}]}},
       {initial_call,
           {mochiweb_socket_server,acceptor_loop,
               [{<0.59.0>,#Port<0.149>,#Fun<mochiweb_http.1.62821608>}]}},
       {ancestors,[couch_httpd,<0.53.0>,couch_server_sup,<0.1.0>]},
       {messages,[]},
       {links,[<0.59.0>,#Port<0.14390>]},
       {dictionary,[]},
       {trap_exit,false},
       {status,running},
       {heap_size,2584},
       {stack_size,23},
       {reductions,3300}],
      []]}}

Thanks,
Shaun


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