<div class="gmail_quote"><br><br>Hi all,<div><br></div><div>As the article <<<font size="2" style="font-family:Helvetica,Arial,sans-serif;line-height:18px;text-align:left;color:rgb(68,68,68);text-decoration:none"><a href="http://www.rabbitmq.com/blog/2011/10/25/high-availability-in-rabbitmq-solving-part-of-the-puzzle/" target="_blank">High Availability in RabbitMQ: solving part of the puzzle</a>>> mentioned, when master breakdown, the last ack maybe not sync to all slave,so when a slave promote to be a new master, the msgs which actualy be consumed maybe redelivered to the consumers.</font></div>
<div><font size="2" style="font-family:Helvetica,Arial,sans-serif;line-height:18px;text-align:left;color:rgb(68,68,68);text-decoration:none">Is there any way to </font><span style="line-height:18px;text-align:left;color:rgb(85,85,85);font-size:13px;font-family:Verdana,sans-serif"> identify these </span><span style="line-height:18px;text-align:left;color:rgb(85,85,85);font-size:13px;font-family:Verdana,sans-serif">duplicated messages? </span><span style="line-height:18px;text-align:left;color:rgb(85,85,85);font-family:Verdana,sans-serif">our</span><span style="line-height:18px;text-align:left;font-family:Verdana,sans-serif;font-weight:bold"> </span><font face="'times new roman', serif"><span style="line-height:20px">scenario</span><span style="font-weight:bold;line-height:20px;background-color:rgb(245,247,252)"> </span><span style="line-height:20px;background-color:rgb(245,247,252)">is :</span></font></div>
<div><font face="'times new roman', serif"><span style="line-height:20px;background-color:rgb(245,247,252)">multi producers, multi queue (every consumer has a private queue ), a direct exchange and a fanout exchange.</span></font></div>
<div><font face="'times new roman', serif"><span style="line-height:20px;background-color:rgb(245,247,252)"><br></span></font></div><div><font face="'times new roman', serif"><span style="line-height:20px;background-color:rgb(245,247,252)">Thanks</span></font></div>
<div style="text-align:left"><font color="#555555" face="Verdana, sans-serif"><span style="line-height:18px"><br></span></font></div>
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