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Posted to dev@ambari.apache.org by "Andrii Tkach (JIRA)" <ji...@apache.org> on 2013/08/06 13:54:48 UTC
[jira] [Created] (AMBARI-2814) NameNode HA Wizard: modify
prerequisite checks
Andrii Tkach created AMBARI-2814:
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Summary: NameNode HA Wizard: modify prerequisite checks
Key: AMBARI-2814
URL: https://issues.apache.org/jira/browse/AMBARI-2814
Project: Ambari
Issue Type: Bug
Components: client
Affects Versions: 1.4.0
Reporter: Andrii Tkach
Assignee: Andrii Tkach
Fix For: 1.4.0
Prerequisite Checks
When the user clicks on "Enable NameNode HA", we will perform the following checks:
If the cluster is already secure, display the error message in a popup: "You cannot enable NameNode HA via this wizard as your cluster is already secured. First, disable security by going to Admin > Security, and then run this Enable NameNode HA wizard again. After NameNode HA is enabled, you can go back to Admin > Security to secure the cluster."
If the above check passes, perform the following checks and display all the errors in one popup:
If the cluster consists of less than 3 hosts, display the error message is: "You must have at least 3 hosts in your cluster to enable NameNode HA".
If the cluster consists of less than 3 ZooKeeper Servers, the error message is: "You must have at least 3 ZooKeeper Servers in your cluster to enable NameNode HA".
If the NameNode is NOT in STARTED state, the error message is: "NameNode must be running before you enable NameNode HA."
The user cannot proceed forward in case any of the above errors have been encountered.
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