CDH Dependency Zookeeper problem for installing HDFs

When installing HDFS, you need to install zookeeper, install 3 nodes, there is always a problem.

At first, it's working well.

After a period of time,

There's a problem!

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Positioning problems

There seems to be at least a problem with the clock bias.

Check the machine and find that the NTP service of the 3 machines is not open and open quickly.

Reference:

Http://www.cnblogs.com/liuyou/archive/2012/07/29/2614341.html

Http://www.aboutyun.com/thread-9087-1-1.html

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Discover the following issues

The original is to use "ntpdc-c loopinfo" to test NTP

Then I took turns executing this command on my 3 machines, and sure enough there were 1 machines with problems:

That's weird!

See in Http://support.ntp.org/bin/view/Support/KnownOsIssues

Finally changed a machine to fix it.

CDH Dependency Zookeeper problem for installing HDFs