[rabbitmq-discuss] Just publishing messages causes rabbit_writer:mainloop to hang and simultaneous pub problem

[Ben Hood]

Hi Joe,

Could you send the complete source code of the test that causes these  
problems so that we can have a look at this, please?

Thx,

Ben

On 14 Apr 2008, at 16:20, Joe Lee wrote:

> I tried to send messages sequentially to a single rabbitmq server  
> running on 127.0.0.1.  After sending messages around 32000, erlang  
> client node publishing the message crashed.  When I looked at the  
> crash dump, I see close to 32767 rabbit_writer:mainloop/1 process  
> still in waiting status.  I am not sure why so many  
> rabbit_writer:mainloop processes are still hanging around.   
> Furthermore, I started another node to get published message from  
> rabbitmq server, rabbitmq server sends basic.get_empty.
>
> crash_dump.erl says:
> Maximum number of Erlang Process has reached 32768
>
> Process status in erlang crash dump:
>
> <0.32765.6>    rabbit_writer:mainloop/1    Waiting    136    233    0
> <0.32766.13>    rabbit_writer:mainloop/1    Waiting    132    233    0
> <0.32767.1>    rabbit_writer:mainloop/1    Waiting    136    233    0
>
>
> I tried spawning 3 erlang processes simultaneously to publish  
> message using pmap to a single rabbitmq_server running on 127.0.0.1  
> and rabbitmq server throws badarg error.  Here is the error below:
>
> =ERROR REPORT==== 14-Apr-2008::19:43:23 ===
> Error in process <0.68.0> on node 'test at home' with exit value:  
> {badarg,[{erlang,size,[1]}, 
> {rabbit_binary_generator,build_content_frames,5}, 
> {rabbit_binary_generator,build_simple_content_frames,3}, 
> {rabbit_writer,assemble_frames,4}, 
> {rabbit_writer,internal_send_command_async...
>
>
> =ERROR REPORT==== 14-Apr-2008::19:43:23 ===
> Error in process <0.70.0> on node 'test at home' with exit value:  
> {badarg,[{erlang,size,[3]}, 
> {rabbit_binary_generator,build_content_frames,5}, 
> {rabbit_binary_generator,build_simple_content_frames,3}, 
> {rabbit_writer,assemble_frames,4}, 
> {rabbit_writer,internal_send_command_async...
>
>
> =ERROR REPORT==== 14-Apr-2008::19:43:23 ===
> Error in process <0.69.0> on node 'test at home' with exit value:  
> {badarg,[{erlang,size,[2]}, 
> {rabbit_binary_generator,build_content_frames,5}, 
> {rabbit_binary_generator,build_simple_content_frames,3}, 
> {rabbit_writer,assemble_frames,4}, 
> {rabbit_writer,internal_send_command_async...
>
> Have a look into this one: closed
> Have a look into this one: closed
> Have a look into this one: closed
> (test at home)2>
>
> I am not sure what these errors mean.  Can someone tell me what I am  
> doing wrong?
>
> Thank you,
> Joe
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