[rabbitmq-discuss] Reading a message from sys.log

[Tomasz Szymkowiak]

Hi,
when i'm trying to get a message from sys.log queue via rabbitmq_management 
plugin i'm getting:


Got response code 500 with body
Internal Server Error

The server encountered an error while processing this request:
{error,
 {exit,
  {{{badmatch,
     {badrpc,
      {'EXIT',
       {{badmatch,
         {error,
          {'EXIT',
           {{badmatch,
             {error,
              {{{badmatch,{error,not_found}},
                [{rabbit_trace,init,1},
                 {rabbit_channel,init,1},
                 {gen_server2,init_it,6},
                 {proc_lib,init_p_do_apply,3}]},
               {child,undefined,channel,
                {rabbit_channel,start_link,
                 [1,<0.12001.10>,<0.12001.10>,<0.11994.10>,
                  <<"<'rabbit at host'.2.11994.10>">>,
                  rabbit_framing_amqp_0_9_1,
                  {user,<<"user">>,
                   [administrator],
                   rabbit_auth_backend_internal,
                   {internal_user,<<"user">>,
                    
<<103,27,123,114,70,159,120,205,173,29,114,226,83,153,225,
                      33,146,220,255,20>>,
                    [administrator]}},
                  <<"/">>,
                  [{<<"publisher_confirms">>,bool,true},
                   {<<"exchange_exchange_bindings">>,bool,true},
                   {<<"basic.nack">>,bool,true},
                   {<<"consumer_cancel_notify">>,bool,true}],
                  <0.11998.10>,<0.12003.10>]},
                intrinsic,4294967295,worker,
                [rabbit_channel]}}}},
            [{rabbit_channel_sup,start_link,1},
             {supervisor2,do_start_child_i,3},
             {supervisor2,handle_call,3},
             {gen_server,handle_msg,5},
             {proc_lib,init_p_do_apply,3}]}}}},
        [{rabbit_direct,start_channel,9},
         {rpc,local_call,3},
         {amqp_channel_sup,'-start_writer_fun/4-fun-0-',7},
         {amqp_channel,start_writer,1},
         {amqp_channel,do_rpc,1},
         {amqp_channel,handle_call,3},
         {gen_server,handle_msg,5},
         {proc_lib,init_p_do_apply,3}]}}}},
    [{amqp_channel_sup,'-start_writer_fun/4-fun-0-',7},
     {amqp_channel,start_writer,1},
     {amqp_channel,do_rpc,1},
     {amqp_channel,handle_call,3},
     {gen_server,handle_msg,5},
     {proc_lib,init_p_do_apply,3}]},
   {gen_server,call,[<0.12001.10>,open,infinity]}},
  [{gen_server,call,3},
   {amqp_gen_connection,open_channel,3},
   {rabbit_mgmt_util,with_channel,5},
   {rabbit_mgmt_util,with_decode,5},
   {rabbit_mgmt_wm_queue_get,process_post,2},
   {webmachine_resource,resource_call,3},
   {webmachine_resource,do,3},
   {webmachine_decision_core,resource_call,1}]}}


it happens only, when the tracing is on (vhost "/")
when i turn it off - the message is read properly
what am i doing wrong ?

rabbitmqctl status:

Status of node 'rabbit at host' ...
[{pid,3510},
 {running_applications,
     [{rabbitmq_management_visualiser,"RabbitMQ Visualiser","3.1.5"},
      {rabbitmq_tracing,"RabbitMQ message logging / tracing","3.1.5"},
      {rabbitmq_management,"RabbitMQ Management Console","3.1.5"},
      {rabbitmq_management_agent,"RabbitMQ Management Agent","3.1.5"},
      {rabbit,"RabbitMQ","3.1.5"},
      {os_mon,"CPO  CXC 138 46","2.2.7"},
      {rabbitmq_web_dispatch,"RabbitMQ Web Dispatcher","3.1.5"},
      {webmachine,"webmachine","1.10.3-rmq3.1.5-gite9359c7"},
      {mochiweb,"MochiMedia Web Server","2.7.0-rmq3.1.5-git680dba8"},
      {xmerl,"XML parser","1.2.10"},
      {inets,"INETS  CXC 138 49","5.7.1"},
      {mnesia,"MNESIA  CXC 138 12","4.5"},
      {amqp_client,"RabbitMQ AMQP Client","3.1.5"},
      {sasl,"SASL  CXC 138 11","2.1.10"},
      {stdlib,"ERTS  CXC 138 10","1.17.5"},
      {kernel,"ERTS  CXC 138 10","2.14.5"}]},
 {os,{unix,linux}},
 {erlang_version,
     "Erlang R14B04 (erts-5.8.5) [source] [64-bit] [smp:8:8] [rq:8] 
[async-threads:30] [kernel-poll:true]\n"},
 {memory,
     [{total,50383256},
      {connection_procs,605416},
      {queue_procs,560056},
      {plugins,702048},
      {other_proc,11365416},
      {mnesia,229240},
      {mgmt_db,541664},
      {msg_index,99296},
      {other_ets,1374104},
      {binary,13453984},
      {code,17552765},
      {atom,1601817},
      {other_system,2297450}]},
 {vm_memory_high_watermark,0.4},
 {vm_memory_limit,3150484275},
 {disk_free_limit,1000000000},
 {disk_free,11425714176},
 {file_descriptors,
    
 [{total_limit,924},{total_used,25},{sockets_limit,829},{sockets_used,9}]},
 {processes,[{limit,1048576},{used,351}]},
 {run_queue,0},
 {uptime,1052426}]


Regards,
T.
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