Re: Issue starting the CMAP service

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On 09/30/2013 01:45 PM, Patrick Hemmer wrote:
I'm running corosync 2.3.2 on ubuntu precise. I'm playing with a 3 node cluster, and whenever I try to start corosync on one of the nodes, it fails to start properly.
I just do a simple start with `corosync -f`, and whenever I try to  use any of the tools, they error:

# corosync-cmapctl
Failed to initialize the cmap API. Error CS_ERR_TRY_AGAIN
# corosync-quorumtool
Cannot initialize CMAP service

If I wait long enough (about 9 minutes or 530 seconds), it does end up starting, and the tools work, but corosync-quorumtool shows the only member is itself.

However if I start corosync with `strace -f corosync -f` the tools work fine immediately upon start (though it still doesn't show the other nodes). Smells like race condition, but dunno where to begin.



My guess is something is wrong with your network relating to multicast.  Try using udpu mode - it is very stable now and removes multicast from the list of things that can go wrong.

Regards
-steve


This is the output from `corosync -f` (this node is 10.20.0.212):
notice  [TOTEM ] Initializing transport (UDP/IP Unicast).
notice  [TOTEM ] Initializing transmit/receive security (NSS) crypto: none hash: none
notice  [TOTEM ] The network interface [10.20.0.212] is now up.
notice  [TOTEM ] adding new UDPU member {10.20.0.127}
notice  [TOTEM ] adding new UDPU member {10.20.0.212}
notice  [TOTEM ] adding new UDPU member {10.20.2.124}
notice  [TOTEM ] A new membership (10.20.0.212:1122820) was formed. Members joined: 2
notice  [TOTEM ] A new membership (10.20.0.127:1122824) was formed. Members joined: 1 3
### here is where it pauses for almost 9 minutes ###
error   [TOTEM ] FAILED TO RECEIVE
notice  [TOTEM ] A new membership (10.20.0.212:1122876) was formed. Members left: 1 3
notice  [TOTEM ] A new membership (10.20.0.212:1122936) was formed. Members
notice  [TOTEM ] A new membership (10.20.0.212:1123008) was formed. Members
notice  [TOTEM ] A new membership (10.20.0.212:1123064) was formed. Members
notice  [TOTEM ] A new membership (10.20.0.212:1123124) was formed. Members
notice  [TOTEM ] A new membership (10.20.0.212:1123180) was formed. Members
notice  [TOTEM ] A new membership (10.20.0.212:1123248) was formed. Members
notice  [TOTEM ] A new membership (10.20.0.127:1123256) was formed. Members joined: 1 3





This is the config (created by `pcs` utility), it's exactly the same on all 3 nodes, and the other 2 nodes work fine:
----
totem {
version: 2
secauth: off
cluster_name: hapi-server
transport: udpu
}

nodelist {
  node {
        ring0_addr: i-74eb9c2f
        nodeid: 1
       }
  node {
        ring0_addr: i-a3bf0df9
        nodeid: 2
       }
  node {
        ring0_addr: i-ebcfcbb0
        nodeid: 3
       }
}

quorum {
provider: corosync_votequorum
}

logging {
to_syslog: yes
}
----



-Patrick


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