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When you depend on the brokers to flow control your producers, the brokers are usually running with usage managers at 100%. Now if use this in network of brokers configuration it is very easy to get into a scenario where the brokers network bridges lock messages to send to the next broker but bock on the send and thus create a network deadlock.
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Description
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When you depend on the brokers to flow control your producers, the brokers are usually running with usage managers at 100%. Now if use this in network of brokers configuration it is very easy to get into a scenario where the brokers network bridges lock messages to send to the next broker but bock on the send and thus create a network deadlock. |
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Improvement
Resolved
Major
Avoid Network Deadlocks if possible
http://svn.apache.org/viewvc?view=rev&rev=511085
- enabled flow control again on network producers, but now use the sync acking on queues to avoid blocking the network connection. Takes advantage of the fix to AMQ-1123 solve deadlocks at the network bridge.
- disabled flow control on network producers
http://svn.apache.org/viewvc?view=rev&rev=511080