Hello,

I have a cluster of 3 haproxy nodes in All-Active mode using Pacemaker and 
corosync.


OS: Ubuntu 12.04.5

Haproxy - 1.5.9

nbproc 16


This cluster works ok in general.


The issue:


If the backend servers are responding slowly for some reason, all haproxy nodes 
will crash.

i configured queue to 1 and set up reasonable server and client timeouts on 
haproxy


however if for some reason connections builds up on haproxy  crashes and the 
machine becomes unresponsive (all haproxy nodes)


I don't see any kernel errors.


1. how can i debug this ?

2. what is the best practice to protect haproxy from such situation ?


Thanks









Haim Ari / SysOps Manager

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