Only one coprocessor of each priority type can be loaded for a table
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                 Key: HBASE-3624
                 URL: https://issues.apache.org/jira/browse/HBASE-3624
             Project: HBase
          Issue Type: Bug
          Components: coprocessors
    Affects Versions: 0.92.0
         Environment: Standalone HBase, linux
            Reporter: Jesse Daniels


Coprocessors are added to HBase using a TreeSet that is initialized with an 
EnvironmentPriorityComparator. The net effect is that only one coprocessor of a 
given priority can be loaded at a time for a given table. This appears to be 
due to how the TreeSet uses the EnvironmentPriorityComparator to determine 
whether there are duplicate entries - if the coprocessors have the same 
priority (e.g., User), they are considered the same and won't be added to the 
Set.

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