[rabbitmq-discuss] Memory leak caused by error_logger in 2.8.6?

Tue Oct 23 09:38:50 BST 2012

How log does the situation last when this happens? Can you post the logs 'after' the memory goes up unexpectedly - is there any larger terms in there?

On 23 Oct 2012, at 00:05, Travis <hcoyote at ghostar.org> wrote:

> Hello,
> 
> We're seeing large amounts of memory being used in some of our single
> instance 2.8.6 rabbitmq.  When we do a memory
> dump, the output appears to say that error_logger is taking up
> hundreds of megabytes.  For example:
> 
> [{{memory,847631144},
>  <4865.6.0>,
>  [{registered_name,error_logger},
>   {current_function,{gen_event,fetch_msg,5}},
>   {initial_call,{proc_lib,init_p,5}},
>   {status,waiting},
>   {message_queue_len,0},
>   {messages,[]},
>   {links,[<4865.0.0>,<4865.30.0>]},
>   {dictionary,
>    [{{xtype_to_module,topic},rabbit_exchange_type_topic},
>     {'$ancestors',[<4865.2.0>]},
>     {'$initial_call',{gen_event,init_it,6}},
>     {guid,{{36630272,1263673450,3038695659,1008081001},3102285}}]},
>   {trap_exit,true},
>   {error_handler,error_handler},
>   {priority,normal},
>   {group_leader,<4865.30.0>},
>   {total_heap_size,105953765},
>   {heap_size,12538050},
>   {stack_size,8},
>   {reductions,3561515316},
>   {garbage_collection,
>    [{min_bin_vheap_size,46368},
>     {min_heap_size,233},
>     {fullsweep_after,65535},
>     {minor_gcs,578}]},
>   {suspending,[]}]},
> 
> (If more of the dump is needed, I can provide)
> 
> We're a bit perplexed as to what's causing this.  There's nothing odd
> looking in the logs.  For example, we see stuff like this:
> 
> =INFO REPORT==== 22-Oct-2012::18:03:11 ===
> accepting AMQP connection <0.1339.402> (127.0.0.1:32803 -> 127.0.0.1:5672)
> 
> =WARNING REPORT==== 22-Oct-2012::18:03:11 ===
> closing AMQP connection <0.1339.402> (127.0.0.1:32803 -> 127.0.0.1:5672):
> connection_closed_abruptly
> 
> =INFO REPORT==== 22-Oct-2012::18:03:12 ===
> closing AMQP connection <0.1331.402> (127.0.0.1:32796 -> 127.0.0.1:5672)
> 
> =INFO REPORT==== 22-Oct-2012::18:03:12 ===
> accepting AMQP connection <0.1347.402> (127.0.0.1:32840 -> 127.0.0.1:5672)
> 
> =WARNING REPORT==== 22-Oct-2012::18:03:13 ===
> closing AMQP connection <0.1347.402> (127.0.0.1:32840 -> 127.0.0.1:5672):
> connection_closed_abruptly
> 
> =INFO REPORT==== 22-Oct-2012::18:03:13 ===
> closing AMQP connection <0.32496.401> (127.0.0.1:57108 -> 127.0.0.1:5672)
> 
> =INFO REPORT==== 22-Oct-2012::18:03:13 ===
> closing AMQP connection <0.32476.401> (127.0.0.1:57104 -> 127.0.0.1:5672)
> 
> =INFO REPORT==== 22-Oct-2012::18:03:13 ===
> closing AMQP connection <0.32492.401> (127.0.0.1:57107 -> 127.0.0.1:5672)
> 
> =INFO REPORT==== 22-Oct-2012::18:03:13 ===
> closing AMQP connection <0.32468.401> (127.0.0.1:57103 -> 127.0.0.1:5672)
> 
> =INFO REPORT==== 22-Oct-2012::18:03:14 ===
> accepting AMQP connection <0.1355.402> (127.0.0.1:32875 -> 127.0.0.1:5672)
> 
> =INFO REPORT==== 22-Oct-2012::18:03:14 ===
> closing AMQP connection <0.1355.402> (127.0.0.1:32875 -> 127.0.0.1:5672)
> 
> =INFO REPORT==== 22-Oct-2012::18:03:15 ===
> accepting AMQP connection <0.1363.402> (127.0.0.1:32898 -> 127.0.0.1:5672)
> 
> =INFO REPORT==== 22-Oct-2012::18:03:15 ===
> accepting AMQP connection <0.1371.402> (127.0.0.1:32899 -> 127.0.0.1:5672)
> 
> =INFO REPORT==== 22-Oct-2012::18:03:15 ===
> closing AMQP connection <0.1371.402> (127.0.0.1:32899 -> 127.0.0.1:5672)
> 
> =INFO REPORT==== 22-Oct-2012::18:03:15 ===
> closing AMQP connection <0.32484.401> (127.0.0.1:57106 -> 127.0.0.1:5672)
> 
> =INFO REPORT==== 22-Oct-2012::18:03:15 ===
> closing AMQP connection <0.32452.401> (127.0.0.1:57081 -> 127.0.0.1:5672)
> 
> =WARNING REPORT==== 22-Oct-2012::18:03:15 ===
> closing AMQP connection <0.1363.402> (127.0.0.1:32898 -> 127.0.0.1:5672):
> connection_closed_abruptly
> 
> 
> Is there a way to tell what's really going on with the error_logger
> and if we're really generating so many messages that it's causing
> memory to balloon so much?
> 
> Travis
> 
> -- 
> Travis Campbell
> travis at ghostar.org
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