[rabbitmq-discuss] Towards better handling of RabbitMQ connection/channel failures

Tue Sep 17 01:17:12 BST 2013

I completely neglected to mention, this message pertains to the Java
amqp-client.

On Mon, Sep 16, 2013 at 5:13 PM, Jonathan Halterman <jhalterman at gmail.com>wrote:

> I've been experimenting with various sorts of RabbitMQ failures that
> result in connections and channels being shutdown with the goal of being
> able to re-establish connections, channels, and consumers whenever a
> failure occurs. In particular, I've been forcing network partitions on a
> pause_minority configured cluster with a client connected to what will
> become the minority node, to see how things behave, and the results are a
> bit inconsistent.
>
> For a simple test, I created 2 connections and 6 channels then partitioned
> the cluster. Within a minute or so the minority node (to which my client is
> connected connected) shuts itself down. What happens next varies a bit
> which each test run:
>
> Outcome 1: Immediately the shutdown listeners for my 2 connections and all
> 6 channels are called.
>
> Outcome 2: Immediately 2 of my 6 channels' shutdown listeners are called.
> None of the connection shutdown listeners are called. After waiting a few
> minutes I heal the partition and the shutdown listeners for the 2
> connections and the remaining 4 channels are immediately called.
>
> Outcome 3: Immediate 2 of my 6 channels' shutdown listeners are called.
> None of the connection shutdown listeners are called. After about 30
> seconds, with the cluster still partitioned, the shutdown listeners for the
> 2 connections and the remaining 4 channels are immediately called.
>
> ---
>
> I'm interested to learn more about when and why certain shutdown listeners
> might or might not be invoked so I can do a better job of re-establishing
> resources after a failure. Any input is appreciated.
>
> Cheers,
> Jonathan
>
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