Jeffrey Zhong created ZOOKEEPER-1751:
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Summary: ClientCnxn#run could miss the second ping or connection
get dropped before a ping
Key: ZOOKEEPER-1751
URL: https://issues.apache.org/jira/browse/ZOOKEEPER-1751
Project: ZooKeeper
Issue Type: Bug
Affects Versions: 3.4.5
Reporter: Jeffrey Zhong
Assignee: Jeffrey Zhong
We could throw SessionTimeoutException exception even when timeToNextPing may
also be negative depending on the time when the following line is executed by
the thread because we check time out before sending a ping.
{code}
to = readTimeout - clientCnxnSocket.getIdleRecv();
{code}
In addition, we only ping twice no matter how long the session time out value
is. For example, we set session time out = 60mins then we only try ping twice
in 40mins window. Therefore, the connection could be dropped by OS after idle
time out.
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