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Zookeeper >> mail # user >> Server seems not to be sending keep-alives so I lose my session ("have not heard from server....")


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Server seems not to be sending keep-alives so I lose my session ("have not heard from server....")
I am getting the dreaded message:

 10:59:45,871 INFO [org.apache.zookeeper.ClientCnxn] - <Client session
timed out, have not heard from server in 31482ms for sessionid
0x13d11dd08160007, closing socket connection and attempting reconnect>

and from looking at the logs it certainly seems that the keep alive
messages are sometime just not being sent.

In my case I see a bunch of these:
10:58:00,164 DEBUG [org.apache.zookeeper.ClientCnxn] - <Got ping response
for sessionid: 0x13d11dd08160007 after 0ms>
10:58:13,511 DEBUG [org.apache.zookeeper.ClientCnxn] - <Got ping response
for sessionid: 0x13d11dd08160007 after 0ms>
10:58:26,857 DEBUG [org.apache.zookeeper.ClientCnxn] - <Got ping response
for sessionid: 0x13d11dd08160007 after 0ms>
10:58:40,205 DEBUG [org.apache.zookeeper.ClientCnxn] - <Got ping response
for sessionid: 0x13d11dd08160007 after 0ms>
10:59:14,140 DEBUG [org.apache.zookeeper.ClientCnxn] - <Got ping response
for sessionid: 0x13d11dd08160007 after 0ms>

But then nothing from 10:59:14 until 10:59:45 when my client decides its
been too long and so times out.

I'm running 3.4.5 on EC2 ...any suggestions welcome.

Thanks.

Brian Tarbox
--
http://about.me/BrianTarbox
NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB