Node unreachable even though the nodes are pingable

Shrikar archak shrikar84 at gmail.com
Mon Feb 4 19:20:18 EST 2013


Hi All,
We have a 6 node riak cluster running on riak 1.2.1
I am often seeing this issue where the nodes become unreachable
when I run the riak-admin command

electic at riak-6:/var/lib/riak/leveldb$ riak-admin ring-status
Attempting to restart script through sudo -H -u riak
================================== Claimant
===================================
Claimant:  'riak at 192.168.8.132'
Status:     up
Ring Ready: true

============================== Ownership Handoff
==============================
No pending changes.

============================== Unreachable Nodes
==============================
The following nodes are unreachable: ['riak at 192.168.8.134',
                                      'riak at 192.168.8.135']

electic at riak-6:/var/lib/riak/leveldb$ ping 92.168.8.134
PING 92.168.8.134 (92.168.8.134) 56(84) bytes of data.
^C
--- 92.168.8.134 ping statistics ---
1 packets transmitted, 0 received, 100% packet loss, time 0ms

electic at riak-6:/var/lib/riak/leveldb$ ping 192.168.8.134
PING 192.168.8.134 (192.168.8.134) 56(84) bytes of data.
64 bytes from 192.168.8.134: icmp_req=1 ttl=64 time=0.062 ms
64 bytes from 192.168.8.134: icmp_req=2 ttl=64 time=0.057 ms

electic at riak-6:/var/lib/riak/leveldb$ ping 192.168.8.135
PING 192.168.8.135 (192.168.8.135) 56(84) bytes of data.
64 bytes from 192.168.8.135: icmp_req=1 ttl=64 time=0.065 ms
64 bytes from 192.168.8.135: icmp_req=2 ttl=64 time=0.057 ms

Has anyone faced similar problems like these?

During this time the latency increases to 1 second or more than that.

Please let me know if there is a way to get around this problem.

Thanks,
Shrikar
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