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From "Volth (JIRA)" <j...@apache.org>
Subject [jira] [Created] (ACCUMULO-4041) Java reflection eats too much CPU
Date Wed, 28 Oct 2015 16:01:27 GMT
Volth created ACCUMULO-4041:
-------------------------------

             Summary: Java reflection eats too much CPU
                 Key: ACCUMULO-4041
                 URL: https://issues.apache.org/jira/browse/ACCUMULO-4041
             Project: Accumulo
          Issue Type: Bug
          Components: tserver
    Affects Versions: 1.7.0
         Environment: Ubuntu 15.10, jdk1.8.0_60
            Reporter: Volth


This is called so many times that it eats too much CPU:
Perhaps the annotation data should be copied into regular variables which can be accessed
without reflection.

- org.apache.accumulo.core.client.impl.Tables.getZooCache()
  - org.apache.accumulo.server.client.HdfsZooInstance.getZooKeepersSessionTimeOut()
    - org.apache.accumulo.core.conf.AccumuloConfiguration.getTimeInMillis()
      - org.apache.accumulo.core.conf.SiteConfiguration.get()
        - org.apache.accumulo.core.conf.Property.isSensitive()
          - org.apache.accumulo.core.conf.Property.hasAnnotation()
            - java.lang.Class.getField()	



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