ZHE CHEN created ZOOKEEPER-2666:
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Summary: the watch function called many times when it should be
called once
Key: ZOOKEEPER-2666
URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2666
Project: ZooKeeper
Issue Type: Bug
Components: c client, server
Affects Versions: 3.4.5
Environment: ubuntu 14.04
zookeeper 3.4.5, it's installed by apt-get
Reporter: ZHE CHEN
We have a service A, which has 2 instances A1 and A2.
We also have another 2 services, B and C. B has 2 instances B1 and B2. C has 2
instances C1 and C2.
A1 and A2 both register child watch for B and C. 2 individual watches, of
course.
I restart B1 and C1 nearly at the same time. Then, theoretically A1 and A2
both should receive 2 events about the child change of service B and C.
However, the real result is, A1 received the 2 children changes of service B
and C separately, A2 only received the children change of service B. Moreover,
A2 got the children change of service B many many times when service B only
changed once at that time (I add auto re-registration so A2 can receive the
event more than once).
Till now, it only happened once. If it happens again, maybe I will provide some
logs.
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