Zhuohui Li created AMBARI-18085:
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Summary: Inconsistence between hosts and components leads to empty
service in web ui
Key: AMBARI-18085
URL: https://issues.apache.org/jira/browse/AMBARI-18085
Project: Ambari
Issue Type: Bug
Components: ambari-server
Affects Versions: 2.2.0
Environment: Centos6.5, HDP-2.4.2.0-258
Reporter: Zhuohui Li
Priority: Minor
I use the REST api to remove some nodes from existing cluster. I do as the doc
says. First stop all the service, then remove all the services(excluding
installed clients) and finally remove the nodes. However, after doing all these
things, the ambari database went into an inconsistent state. The
`hostcomponentstate` and `hostcomponentdesiredstate` table contained deleted
hosts entries which could not be found in `hosts` table. This leaded to when
joining the `hosts` table and `hostcomponentstate`, we got a null HostEntity.
So my opinion is should Ambari disable deleting node operation while there are
still installed clients on the node, or should Ambari make a guarantee that the
scenario I described never happens?
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