jiajunwang opened a new pull request #1059:
URL: https://github.com/apache/helix/pull/1059


   ### Issues
   
   - [X] My PR addresses the following Helix issues and references them in the 
PR description:
   
   #1028 
   
   ### Description
   
   - [X] Here are some details about my PR, including screenshots of any UI 
changes:
   
   Add a monitor wrapper class so that the abnormal state resolver reports the 
abnormal states detected and the recovery attempt count.
   
   Example ObjectName of the new monitor MBean: 
Rebalancer:ClusterName=<clusterName>, 
EntityName=AbnormalStates.<StateModelDefName>
   Attributes,
   1. AbnormalStatePartitionCounter: record the total count of the partitions 
that has been found in abnormal status. Note that if one partition has been 
found to be abnormal twice, then we will record it twice in this counter as 
well.
   2. RecoveryAttemptCounter: record the total count of succuessful recovery 
computation that has been done by the resolver.
   
   ### Tests
   
   - [X] The following tests are written for this issue:
   
   TestAbnormalStatesResolverMonitor
   
   - [ ] The following is the result of the "mvn test" command on the 
appropriate module:
   
   Running...
   
   ### Commits
   
   - [X] My commits all reference appropriate Apache Helix GitHub issues in 
their subject lines. In addition, my commits follow the guidelines from "[How 
to write a good git commit message](http://chris.beams.io/posts/git-commit/)":
     1. Subject is separated from body by a blank line
     1. Subject is limited to 50 characters (not including Jira issue reference)
     1. Subject does not end with a period
     1. Subject uses the imperative mood ("add", not "adding")
     1. Body wraps at 72 characters
     1. Body explains "what" and "why", not "how"
   
   ### Documentation (Optional)
   
   - [ ] In case of new functionality, my PR adds documentation in the 
following wiki page:
   
   (Link the GitHub wiki you added)
   
   ### Code Quality
   
   - [X] My diff has been formatted using helix-style.xml 
   (helix-style-intellij.xml if IntelliJ IDE is used)


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