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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black">Hi,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black">We are experiencing a frequent partitioning problem on our network with our RabbitMQ cluster. We’ve not been able to iron it out and are running out of time
before this needs to move into production.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black">I’ll just focus on our DEV environment as it is just a scaled down version of the other environments.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black">Running on ESXi virtual machines (4GB Ram, 4 Cores dedicated)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black">Windows2008 R2 SP1 64-Bit<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black">RabbitMQ 3.2.0<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black">Erlang R16B02<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black">There are two web servers and one app server in the above config. These are all connected to the same network. Each servers is running its own node – clustering
is done through the rabbit config file.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black">Devweb01 – Ram<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black">Devweb02 – Ram<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black">DevApp01 - Disk<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black">The problem is that every once in a while it starts partitioning off nodes, with nothing really correlating with it happening… not big traffic on the network,
no disruptions we can find, etc. We have gone through and made sure there were no VM settings that allowed items to “go to sleep” or anything aside from a “high performance setting” (versus power savings).
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black">Here is what we are seeing in the logs… which to me looks like a network interruption, but nothing else indicated that the machine was having issues. We have
a load balancer that flags systems with problems, we have a zenoss node monitoring the servers, we checked the ESXi charts and logs, we looked through windows system logs… nothing seems to have been amiss.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black">In one partitioning event we saw this in the WebApp server log:<o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black">=INFO REPORT==== 27-Nov-2013::18:11:07 ===<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black">rabbit on node 'rabbit@NURWEB-DEVWEB01' down<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black">=ERROR REPORT==== 27-Nov-2013::18:11:10 ===<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black">Mnesia('rabbit@NURWEB-DEVAPP01'): ** ERROR ** mnesia_event got {inconsistent_database, running_partitioned_network, 'rabbit@NURWEB-DEVWEB01'}<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black">And in the DevWeb01 machine mentioned’s logs we saw this – it also mentions it lost connections to both of the other boxes.<o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black">=INFO REPORT==== 27-Nov-2013::18:10:53 ===<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black">rabbit on node 'rabbit@NURWEB-DEVAPP01' down<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black">=ERROR REPORT==== 27-Nov-2013::18:10:53 ===<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black">Mnesia('rabbit@NURWEB-DEVWEB01'): ** ERROR ** mnesia_event got {inconsistent_database, running_partitioned_network, 'rabbit@NURWEB-DEVAPP01'}<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black">=ERROR REPORT==== 27-Nov-2013::18:10:59 ===<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black">Mnesia('rabbit@NURWEB-DEVWEB01'): ** ERROR ** mnesia_event got {inconsistent_database, running_partitioned_network, 'rabbit@NURWEB-DEVWEB02'}<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black">=INFO REPORT==== 27-Nov-2013::18:11:00 ===<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black">only running disc node went down<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black">=INFO REPORT==== 27-Nov-2013::18:11:01 ===<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black">rabbit on node 'rabbit@NURWEB-DEVWEB02' down<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black">=INFO REPORT==== 27-Nov-2013::18:11:04 ===<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black">only running disc node went down<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black">And web02 only mentions the web01 going down<o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black">=INFO REPORT==== 27-Nov-2013::18:11:09 ===<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black">rabbit on node 'rabbit@NURWEB-DEVWEB01' down<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black">=ERROR REPORT==== 27-Nov-2013::18:11:11 ===<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black">Mnesia('rabbit@NURWEB-DEVWEB02'): ** ERROR ** mnes<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black">None of the rabbit installs are actually down during this…<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black">We’ve seen the same thing on our qa and production boxes – which are the same configurations, just with more nodes. Not many though 8 nodes on production.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black">Any ideas would be really appreciated! I’ve recently added a net_ticktime to my dev servers to set that at 120 (double I believe) to see if that helps.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-family:"Arial","sans-serif";color:#F0982E">Bill
</span></b><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><i><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#7C7C7C"><br>
<br>
</span></i><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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