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Key: ZOOKEEPER-1436
URL: https://issues.apache.org/jira/browse/ZOOKEEPER-1436
Project: ZooKeeper
Issue Type: Improvement
Components: c client
Affects Versions: 3.4.3
Reporter: Thawan Kooburat
The zookeeper c client knows how long its session will last, and periodically
pings in order to keep that session alive. However, if it loses connection, it
hops from ensemble member to ensemble member trying to reform the session -
even after the session timeout expires.
This patch at a new session event (ZOO_TIMED_OUT_STATE) that notifies the user
that the session timeout has passed, and we have been unable to reconnect. The
event is one-shot per disconnection and get generated from the C-client library
itself. The server has no knowledge of this event.
Example use cases:
1. Client can try to reconnect to a different set of observers if it unable to
connect to the original set of observers.
2. Client can quickly stop acting as an active server, since other server may
already taken over the active role while it is trying to reconnect.
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