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Zookeeper >> mail # user >> Unrecoverable ConnectionLossException after server restart


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Unrecoverable ConnectionLossException after server restart
I'm seeing (what I think) is incorrect behavior from ZooKeeper.

When I start a client, connect to a server, and then restart the server, the client (I thought) was supposed to eventually reconnect. It doesn't. It continually throws a ConnectionLossException on every use, the ZooKeeper client isAlive is true, I never get a SESSION_EXPIRATION, and I can see the client side ephemeral ports listed in the error message counting up as if it's continually attempting to reconnect.

If I recreate the ZooKeeper client, the new client connects and I can use it.

So I could simply react as if I got a SESSION_EXPIRATION exception and rebuild the client state, except the a ConnectionLossException is something I ALSO get when I get a network partition. When I periodically recreate the entire client from scratch in response to a ConnectionLossException I eventually run out of file descriptors and my entire process is hosed. This seems to be related to the use of nio and the repeated opening of pipes and anon_inodes (which show up in an lsof).

Am I doing something wrong? Any suggestions?

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Carroll James 2012-11-28, 17:17
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Carroll James 2012-11-28, 18:03
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Patrick Hunt 2012-11-28, 17:54
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Carroll James 2012-11-28, 18:04