<html><head><meta http-equiv="Content-Type" content="text/html charset=iso-8859-1"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Hi Chip,<div>If you are using the Java client, then it is possible that you are issuing the <font face="Inconsolata">channel.close()</font> from within the <font face="Inconsolata">Consumer</font> (in the code for the <font face="Inconsolata">handleCancel()</font> method).</div><div><br></div><div>In this case, the Consumer callback is being executed on a worker thread, and although you can issue channel commands from here, <font face="Inconsolata">close()</font> is a bit special, because it may involve waiting for callbacks to finish. This would explain why you hang in the client. (The server is probably sending the <font face="Inconsolata">close-ok</font>, but you aren't seeing it -- the client has hung already.)</div><div><br></div><div>We should document this properly in the Java client specs, but in the meantime, you should issue the <font face="Inconsolata">close</font> in the main app, rather than in the <font face="Inconsolata">Consumer</font>.</div><div><br></div><div>Does this explain your observed behaviour?</div><div><br></div><div>BTW: This is all speculation, and if I am off the mark, I apologise. In reporting problems a little more context is helpful: which client you are using, more about how you are using it, and some diagnostic information [in this case, the stack frames during the hang, and/or a trace of the frames to/from Rabbit would have been perfect] can speed a satisfactory response.</div><div><br><div apple-content-edited="true">
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<br><div><div>On 1 May 2013, at 05:16, Chip Salzenberg <<a href="mailto:rev.chip@gmail.com">rev.chip@gmail.com</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div dir="ltr">I've successfully used the optional server feature of sending a basic.cancel when a consumed queue is deleted. Great. But a reasonable thing to do at that point is to close the channel, right? But when I send a channel.close in that circumstance, RMQ 3.0.4 does not send a close-ok. It doesn't send anything. This makes my app hang. I have to cheat and ass_u_me that the channel is closed in order to keep working.<div>
<br></div><div style="">Am I doing something wrong? Is this a server bug? Both? :)</div></div>
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