Xiao Yu created HADOOP-19469:
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Summary: Set Curator Connection Timeout
Key: HADOOP-19469
URL: https://issues.apache.org/jira/browse/HADOOP-19469
Project: Hadoop Common
Issue Type: Bug
Components: hadoop-common
Affects Versions: 3.3.6, 3.5.0
Reporter: Xiao Yu
Curator 5.2.0 has a default "connection timeout" of 15s:
[https://github.com/apache/curator/blob/apache-curator-5.2.0/curator-framework/src/main/java/org/apache/curator/framework/CuratorFrameworkFactory.java#L63]
And it will throw a warning if the Zookeeper session timeout is less than the
Curator connection timeout:
[https://github.com/apache/curator/blob/apache-curator-5.2.0/curator-client/src/main/java/org/apache/curator/CuratorZookeeperClient.java#L117-L120]
The Hadoop default for ZK timeout is set to 10s:
[https://github.com/apache/hadoop/blob/0dd9bf8/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/CommonConfigurationKeys.java#L414-L416]
Which means without setting the "connection timeout" a default installation
will keep warning about the connection timeout for Curator being lower than the
requested session timeout. This sets both timeout values to override the
Curator default.
Another option is to change the default Hadoop ZK timeout from 10s to 15s.
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