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From "Hiram Chirino (JIRA)" <>
Subject [jira] Commented: (AMQ-1181) Avoid Network Deadlocks if possible
Date Mon, 26 Feb 2007 19:57:02 GMT


Hiram Chirino commented on AMQ-1181:

Several changes went into the 4.1 branch to help avoid these network deadlocks: - 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

> Avoid Network Deadlocks if possible
> -----------------------------------
>                 Key: AMQ-1181
>                 URL:
>             Project: ActiveMQ
>          Issue Type: Improvement
>    Affects Versions: 4.0, 4.0.1
>            Reporter: Hiram Chirino
>         Assigned To: Hiram Chirino
>             Fix For: 4.1.1, 4.2.0
> 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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