[rabbitmq-discuss] Connection.createChannel returns null

Siva Jagadeesan siva at runa.com
Wed Oct 14 02:33:24 BST 2009

HI Ben:
We are using RabbitMQ 1.6

It is simple code where we use one connection to create channels (almost
100K) but it starts returning null after creating 500 of them.So I discard
that connection and create a new connection. But when I create channel from
new connection , it creates only one channel and after that it keeps
returning null.

I changed my code to call createChannel(int channelNumber) ...it seems to be
working ... it has processed like 10 k records.

I will update ...

-- Siva Jagadeesan

On Tue, Oct 13, 2009 at 4:18 PM, Ben Hood <0x6e6562 at gmail.com> wrote:

> Siva,
> On Tue, Oct 13, 2009 at 11:42 PM, Siva Jagadeesan <siva at runa.com> wrote:
> > For some reason when I create a channel using connection.createChannel it
> is
> > returning null. When I throw that connection and create a new connection
> ...
> > from then on it returns a channel for one time ... so i have to discard
> my
> > connection and create new connection every time I create channel.
> > I do not know why createChannel returns null.
> There is one known issue with createChannel returning null, which has
> been fixed in 1.7.0.
> This is documented here:
> http://hopper.squarespace.com/blog/2009/8/31/hotspot-arithmetic.html
> However, this may not be the cause in your case.
> Please can you send a cut down version of the code that reproduces the
> symptom.
> Ben
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