RuiLi8080 opened a new pull request #3196: [STORM-3568] prevent user from changing log level with empty logger name from topo UI URL: https://github.com/apache/storm/pull/3196 A minor fix to topo UI. This change alert user when they try to change log level on topology page without providing a logger name. Currently user can do this and get a 500 Server Error at the bottom which could be confusing. 
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