[GitHub] obi458 opened a new issue #1181: Race in is_idle

[GitBox <gi...@apache.org>]

obi458 opened a new issue #1181: Race in is_idle
URL: https://github.com/apache/couchdb/issues/1181
 
 
   There is are race in is_idle and couch_server:open
   
   Example: 
   
   ```
   % We start with **one** Process(M) monitored file(fd)!
   % open/ create db
   case gen_server:call(couch_server, {open, DbName, Options}, Timeout) of
   ###### time for race begins here
           % Now M is gone here, therefore no monitor at all!
           % now couch_file check is_idle, we have no monitor and the file will be closed!!!!!!!!!
           {ok, Db0} ->
               {ok, Db1} = couch_db:incref(Db0), %<- monitor, but to late!
               couch_db:set_user_ctx(Db1, Ctx);
   .....
   ```
   
   is_idle function needs to redesigned!
   

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