On 01/22/2014 07:40 PM, Alan Conway wrote:
From qpid/cpp/src/qpid/framing/amqp_types.h:
/** Maximum channel ID used by broker. Reserve high bit for internal
use.*/ const ChannelId CHANNEL_MAX=(ChannelId(~1))>>1; const
ChannelId CHANNEL_HIGH_BIT= ChannelId(~CHANNEL_MAX);
Does anyone know if and where the channel high bit is used
internally? There's no reference to CHANNEL_HIGH_BIT anywhere in the
source.
It was introduced ages ago:
http://svn.apache.org/viewvc?view=revision&revision=551981. This is in
the 0-10 implementation, and I can't see anything in the 0-10 spec that
would require this. From the comment it sounds like it was maybe being
reserved in case it was needed 'internally' within the broker(?)
This affects new HA which (currently) needs a channel per replicated
queue. The definition above limits us to 32k queues. Any thoughts on
the impact of changing this to 64k? For my purposes the change can be
server-side only, so the client could still limit channels to 32k (if
there's a reason to do that)
I can't see any reason for the limit, so I would be fine with changing it.
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