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From 박영근(Alex) <alex.p...@nexr.com>
Subject Creating a znode with SEQUENTIAL_EPHEMERAL mode becomes corrupt in case of unstable network
Date Wed, 21 Sep 2011 13:16:06 GMT
Hi, All

I met a problem in creating a znode with SEQUENTIAL_EPHEMERAL mode under
unstable network condition.

While a client did not receive a message that a sequential node was
created,
the ensemble has the znode, which is checked at zookeeper dashboard(
https://github.com/phunt/zookeeper_dashboard).

If the client receives a DISCONNECTED event, it tries to reconnect.
Session timeout is 30 seconds.

Unstable network condition is made as the following:

The grinder agent sends a request of creating a znode of
CreateMode. SEQUENTIAL_EPHEMERAL.
ZK ensemble has three servers.
Each NIC of server is down and up repeatedly;
NIC of server1 become down every one minute and sleeps for 9 seconds, then
up
NIC of server2 become down every 2 minute and sleeps for 9 seconds, then up
NIC of server3 become down every 3 minute and sleeps for 9 seconds, then up

Is there any idea or related issue?

Thanks in advance.

Alex

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