we have a cluster of three RabbitMQs (3.0.1). After having too many unacked messages (because of an error on client side) we ran into a memory error ("Cannot allocate 1167696400 bytes of memory (of type "old_heap")".
Now the management plugin shows "blocked" and "blocking" connections. Additional one of these connections has a channel with 1.6m unacked messages. These connections and channels are not displayed when calling "rabbitmqctl list_connections" or "rabbitmqctl list_channels"!
These connections/channels survived the restart of the client server and the RabbitMQ server.
Closing the connection with the management plugin results in this error:

{throw,{error,{not_a_connection_pid,<0.449.0>}}, [{rabbit_networking,close_connection,2}, {rabbit_mgmt_wm_connection,delete_resource,2}, {webmachine_resource,resource_call,3}, {webmachine_resource,do,3}, {webmachine_decision_core,resource_call,1}, {webmachine_decision_core,decision,1}, {webmachine_decision_core,handle_request,2}, {rabbit_webmachine,'-makeloop/1-fun-0-',2}]}

This is the ouput of the rest client for one of these connections (ip addresses censored):

"recv_oct": 636365,
"recv_cnt": 949,
"send_oct": 1696,
"send_cnt": 164,
"send_pend": 0,
"state": "blocked",
"last_blocked_by": "resource",
"last_blocked_age": 1.251632,
"channels": 5,
"rate": 0,
"interval": 32663327,
"last_event": 1365522007990
"rate": 0,
"interval": 32663327,
"last_event": 1365522007990
"type": "network",
"node": "m12n-production at rabbitmq1",
"name": "###.##.1.102:13353 -> ###.##.1.70:5672",
"port": 5672,
"peer_port": 13353,
"host": "###.##.1.70",
"peer_host": "###.##.1.102",
"ssl": false,
"peer_cert_subject": "",
"peer_cert_issuer": "",
"peer_cert_validity": "",
"auth_mechanism": "PLAIN",
"ssl_protocol": "",
"ssl_key_exchange": "",
"ssl_cipher": "",
"ssl_hash": "",
"protocol": "AMQP 0-9-1",
"user": "m12n",
"vhost": "prod",
"timeout": 30,
"frame_max": 131072,
"product": "RabbitMQ",
"information": "Licensed under the MPL. See http://www.rabbitmq.com/",
"platform": "Java",
"exchange_exchange_bindings": true,
"consumer_cancel_notify": true,
"basic.nack": true,
"publisher_confirms": true
"copyright": "Copyright (C) 2007-2012 VMware, Inc.",
"version": "3.0.1"

How can we kill these connections/channels?

Greetings, Dirk

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grouprabbitmq-discuss @
postedApr 17, '13 at 8:57a
activeApr 17, '13 at 10:04a

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Simon MacMullen: 2 posts Dirk Plate: 1 post



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