file_server_2 is wedged

Hi,

We have a system running R21 where file_server_2 is stuck in a nif call. Here's the stack trace.


root@F-DC1-CE1-CFS-06:~# doErlangFun "erlang:process_info(whereis(file_server_2),current_stacktrace)"
{current_stacktrace,[{prim_file,read_info_1,3,[]},
                     {file_server,handle_call,3,
                                  [{file,"file_server.erl"},{line,146}]},
                     {gen_server,try_handle_call,4,
                                 [{file,"gen_server.erl"},{line,661}]},
                     {gen_server,handle_msg,6,
                                 [{file,"gen_server.erl"},{line,690}]},
                     {proc_lib,init_p_do_apply,3,
                               [{file,"proc_lib.erl"},{line,249}]}]}

The message queue of file_server_2 keeps growing.

We have the async thread pool set to 25.

Has anyone seen this before?

Thanks