Ambari Server / Web Client Version Mismatch

Sometimes users encounter message "Ambari Server / Web Client Version Mismatch", indicating that the version of UI in browser does not match version of server. 

This can happen when Ambari is not built with the parameter newVersion.

As documented in "Building Ambari" section of Ambari Development, the extra parameter should be added to Maven as follows

mvn clean package versions:set -DnewVersion="1.5.0.106" 

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Ambari UI fails to load

Sometimes users run into Ambari UI issues where the problem is not obvious (like below), and interaction is stuck.

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Users can use the browser to get additional details which might be helpful for in identifying the issue. 

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