Hi,<div><br></div><div>Our RabbitMQ server suddenly started hanging when running "rabbitmqctl list_connections". All other commands seem to work just fine, and viewing the connection the HTTP interface works. It's just the command line that is hanging.</div><div><br></div><div>Here's all I see:</div><div><br></div><div><div># /usr/sbin/rabbitmqctl list_connections</div><div>Listing connections ...</div></div><div><br></div><div>Is there something I can do to help troubleshoot this? Here's the output from "rabbitmqctl report" before it hangs on trying to pull connections.</div><div><br></div><div><div># /usr/sbin/rabbitmqctl report</div><div>Reporting server status on {{2012,10,8},{20,54,53}}</div><div><br></div><div>Status of node rabbit@db1 ...</div><div>[{pid,32745},</div><div>&nbsp;{running_applications,</div><div>&nbsp; &nbsp; &nbsp;[{rabbitmq_management,"RabbitMQ Management Console","2.8.5"},</div><div>&nbsp; &nbsp; &nbsp; {xmerl,"XML parser","1.2.10"},</div><div>&nbsp; &nbsp; &nbsp; {rabbitmq_management_agent,"RabbitMQ Management Agent","2.8.5"},</div><div>&nbsp; &nbsp; &nbsp; {amqp_client,"RabbitMQ AMQP Client","2.8.5"},</div><div>&nbsp; &nbsp; &nbsp; {rabbit,"RabbitMQ","2.8.5"},</div><div>&nbsp; &nbsp; &nbsp; {os_mon,"CPO &nbsp;CXC 138 46","2.2.7"},</div><div>&nbsp; &nbsp; &nbsp; {sasl,"SASL &nbsp;CXC 138 11","2.1.10"},</div><div>&nbsp; &nbsp; &nbsp; {rabbitmq_mochiweb,"RabbitMQ Mochiweb Embedding","2.8.5"},</div><div>&nbsp; &nbsp; &nbsp; {webmachine,"webmachine","1.9.1-rmq2.8.5-git52e62bc"},</div><div>&nbsp; &nbsp; &nbsp; {mochiweb,"MochiMedia Web Server","1.4.1"},</div><div>&nbsp; &nbsp; &nbsp; {crypto,"CRYPTO version 2","2.0.4"},</div><div>&nbsp; &nbsp; &nbsp; {inets,"INETS &nbsp;CXC 138 49","5.7.1"},</div><div>&nbsp; &nbsp; &nbsp; {mnesia,"MNESIA &nbsp;CXC 138 12","4.5"},</div><div>&nbsp; &nbsp; &nbsp; {stdlib,"ERTS &nbsp;CXC 138 10","1.17.5"},</div><div>&nbsp; &nbsp; &nbsp; {kernel,"ERTS &nbsp;CXC 138 10","2.14.5"}]},</div><div>&nbsp;{os,{unix,linux}},</div><div>&nbsp;{erlang_version,</div><div>&nbsp; &nbsp; &nbsp;"Erlang R14B04 (erts-5.8.5) [source] [64-bit] [smp:8:8] [rq:8] [async-threads:30] [kernel-poll:true]\n"},</div><div>&nbsp;{memory,</div><div>&nbsp; &nbsp; &nbsp;[{total,504912632},</div><div>&nbsp; &nbsp; &nbsp; {processes,421348016},</div><div>&nbsp; &nbsp; &nbsp; {processes_used,419304016},</div><div>&nbsp; &nbsp; &nbsp; {system,83564616},</div><div>&nbsp; &nbsp; &nbsp; {atom,4044769},</div><div>&nbsp; &nbsp; &nbsp; {atom_used,4023674},</div><div>&nbsp; &nbsp; &nbsp; {binary,34192176},</div><div>&nbsp; &nbsp; &nbsp; {code,18261044},</div><div>&nbsp; &nbsp; &nbsp; {ets,21905592}]},</div><div>&nbsp;{vm_memory_high_watermark,0.25},</div><div>&nbsp;{vm_memory_limit,4223227904},</div><div>&nbsp;{disk_free_limit,1000000000},</div><div>&nbsp;{disk_free,330037432320},</div><div>&nbsp;{file_descriptors,</div><div>&nbsp; &nbsp; &nbsp;[{total_limit,3996},</div><div>&nbsp; &nbsp; &nbsp; {total_used,290},</div><div>&nbsp; &nbsp; &nbsp; {sockets_limit,3594},</div><div>&nbsp; &nbsp; &nbsp; {sockets_used,225}]},</div><div>&nbsp;{processes,[{limit,1048576},{used,5329}]},</div><div>&nbsp;{run_queue,0},</div><div>&nbsp;{uptime,5162544}]</div><div><br></div><div>Cluster status of node rabbit@db1 ...</div><div>[{nodes,[{disc,[rabbit@db1]}]},{running_nodes,[rabbit@db1]}]</div><div><br></div><div>Application environment of node rabbit@db1 ...</div><div>[{auth_backends,[rabbit_auth_backend_internal]},</div><div>&nbsp;{auth_mechanisms,['PLAIN','AMQPLAIN']},</div><div>&nbsp;{backing_queue_module,rabbit_variable_queue},</div><div>&nbsp;{cluster_nodes,[]},</div><div>&nbsp;{collect_statistics,fine},</div><div>&nbsp;{collect_statistics_interval,5000},</div><div>&nbsp;{default_permissions,[&lt;&lt;".*"&gt;&gt;,&lt;&lt;".*"&gt;&gt;,&lt;&lt;".*"&gt;&gt;]},</div><div>&nbsp;{default_user,&lt;&lt;"guest"&gt;&gt;},</div><div>&nbsp;{default_user_tags,[administrator]},</div><div>&nbsp;{default_vhost,&lt;&lt;"/"&gt;&gt;},</div><div>&nbsp;{delegate_count,16},</div><div>&nbsp;{disk_free_limit,1000000000},</div><div>&nbsp;{error_logger,{file,"/var/log/rabbitmq/rabbit@db1.log"}},</div><div>&nbsp;{frame_max,131072},</div><div>&nbsp;{hipe_compile,false},</div><div>&nbsp;{included_applications,[]},</div><div>&nbsp;{log_levels,[{connection,info}]},</div><div>&nbsp;{msg_store_file_size_limit,16777216},</div><div>&nbsp;{msg_store_index_module,rabbit_msg_store_ets_index},</div><div>&nbsp;{queue_index_max_journal_entries,262144},</div><div>&nbsp;{sasl_error_logger,{file,"/var/log/rabbitmq/rabbit@db1-sasl.log"}},</div><div>&nbsp;{server_properties,[]},</div><div>&nbsp;{ssl_cert_login_from,distinguished_name},</div><div>&nbsp;{ssl_listeners,[]},</div><div>&nbsp;{ssl_options,[]},</div><div>&nbsp;{tcp_listen_options,[binary,</div><div>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; {packet,raw},</div><div>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; {reuseaddr,true},</div><div>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; {backlog,128},</div><div>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; {nodelay,true},</div><div>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; {linger,{true,0}},</div><div>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; {exit_on_close,false}]},</div><div>&nbsp;{tcp_listeners,[5672]},</div><div>&nbsp;{trace_vhosts,[]},</div><div>&nbsp;{vm_memory_high_watermark,0.25}]</div><div><br></div><div>Connections:</div><div><br></div><div>Session terminated, killing shell... ...killed.</div></div>