Hi folks,<br><br>My java client is hitting a deadlock closing a channel or a connection. I have also noticed that it hangs when deleting a queue as well. I have noticed this error when the server has a large number of connections. When I reboot the error goes away for some time and then appears again. In the rabbitmq management webpage I see a memory warning<br><br>Memory usage is 2.3GB where the high watermark is 1.5 GB.<br>"The memory alarm for this node has gone off. It will block incoming network 
traffic until the memory usage drops below the watermark. ". <br><br>Why is the memory usage above the watermark? From what I have read RabbitMQ moves the messages to disk and scales that way without using more memory.<br><br>regards,<br>Dharshan<br>www.scalegrid.net<br>(Services for the private cloud)<br><br><br>Here is the status of my server<br><br>Status of node rabbit@drrabbitmq1 ...<br>[{pid,1169},<br>&nbsp;{running_applications,<br>&nbsp;&nbsp;&nbsp;&nbsp; [{rabbitmq_management,"RabbitMQ Management Console","2.8.4"},<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {xmerl,"XML parser","1.2.10"},<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {rabbitmq_management_agent,"RabbitMQ Management Agent","2.8.4"},<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {amqp_client,"RabbitMQ AMQP Client","2.8.4"},<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {rabbit,"RabbitMQ","2.8.4"},<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {ssl,"Erlang/OTP SSL application","4.1.6"},<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {public_key,"Public key infrastructure","0.13"},<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {crypto,"CRYPTO version 2","2.0.4"},<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {os_mon,"CPO&nbsp; CXC 138 46","2.2.7"},<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {sasl,"SASL&nbsp; CXC 138 11","2.1.10"},<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {rabbitmq_mochiweb,"RabbitMQ Mochiweb Embedding","2.8.4"},<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {webmachine,"webmachine","1.7.0-rmq2.8.4-hg"},<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {mochiweb,"MochiMedia Web Server","1.3-rmq2.8.4-git"},<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {inets,"INETS&nbsp; CXC 138 49","5.7.1"},<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {mnesia,"MNESIA&nbsp; CXC 138 12","4.5"},<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {stdlib,"ERTS&nbsp; CXC 138 10","1.17.5"},<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {kernel,"ERTS&nbsp; CXC 138 10","2.14.5"}]},<br>&nbsp;{os,{unix,linux}},<br>&nbsp;{erlang_version,<br>&nbsp;&nbsp;&nbsp;&nbsp; "Erlang R14B04 (erts-5.8.5) [source] [64-bit] [smp:2:2] [rq:2] [async-threads:30] [kernel-poll:true]\n"},<br>&nbsp;{memory,<br>&nbsp;&nbsp;&nbsp;&nbsp; [{total,2379504536},<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {processes,1926964632},<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {processes_used,1924985912},<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {system,452539904},<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {atom,1722081},<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {atom_used,1690549},<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {binary,194345200},<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {code,18717132},<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {ets,176530144}]},<br>&nbsp;{vm_memory_high_watermark,0.3999999998070925},<br>&nbsp;{vm_memory_limit,1658825932},<br>&nbsp;{disk_free_limit,1000000000},<br>&nbsp;{disk_free,2966052864},<br>&nbsp;{file_descriptors,<br>&nbsp;&nbsp;&nbsp;&nbsp; [{total_limit,65436},<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {total_used,18006},<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {sockets_limit,58890},<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {sockets_used,8000}]},<br>&nbsp;{processes,[{limit,1048576},{used,98174}]},<br>&nbsp;{run_queue,0},<br>&nbsp;{uptime,61715}]<br>...done.<br><br><br>