Hi,
I am using the 0.10 c++ broker and client libraries on windows and
performing some experiments with the reconnect behaviour of the async sender
in the c++ messaging client API. Specifically, I try to enable heartbeats on
the connection, however until now without success.
I set Connection options "reconnect" to "true" and "heartbeat" to 6, open
the Connection, create a Session and a Sender, then send a few messages
which are delivered as expected. Then I leave the connection idle for a
while, the message "debug Traffic timeout" appears in the client's log after
12 seconds (probably twice the heartbeat interval). This seems to be the
indication that the broker did not sent a heartbeat in time.
Then I start sending messages using the Sender again. It appears the
messages do not reach the broker. Inspection on the broker side shows the
connection with the client still exists, but is idle. At some point the
Sender reaches capacity and then waits indefinitely for capacity inside a
blocking sync() call.
It seems there are two issues here:
1. the broker does not send a heartbeat
2. when the client detects the missing heartbeat, it gets in a state where
it cannot deliver messages to the broker. No exceptions are thrown, no
indications in the log that the connection is lost or of reconnection
attempts
Regarding the first issue:
If I turn on tracing on the broker side, I get:
2011-12-22 11:49:52 trace SENT [192.168.169.27:5672-192.168.169.115:4518]:
Frame[BEbe; channel=0; {ConnectionTuneBody: channel-max=32767;
max-frame-size=65535; heartbeat-min=0; heartbeat-max=0; }]
2011-12-22 11:49:52 trace RECV [192.168.169.27:5672-192.168.169.115:4518]:
Frame[BEbe; channel=0; {ConnectionTuneOkBody: channel-max=32767;
max-frame-size=65535; heartbeat=0; }]
I am not familiar with the protocol at this level, but I suspect this is the
broker telling the client its min/max supported heartbeat intervals (both
0), and then the client agreeing to use heartbeat interval 0.
Does anyone recognize these issues? Does the C++ broker on windows support
heartbeats at all?
Thanks,
Wolf Wolfswinkel
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