[GitHub] [hbase] satanson opened a new pull request #503: reflection fails to access a private nested class

[GitBox <gi...@apache.org>]

satanson opened a new pull request #503: reflection fails to access a private nested class
URL: https://github.com/apache/hbase/pull/503
 
 
   HMaster crashes at org/apache/hadoop/hbase/regionserver/HRegionServer.java:1044
   **A private static nested class can not be instantiated via reflection.**
   
   **code snippet**
   
   ```
         try {
           abortTimeoutTask =
               Class.forName(conf.get(ABORT_TIMEOUT_TASK, SystemExitWhenAbortTimeout.class.getName()))
                   .asSubclass(TimerTask.class).getDeclaredConstructor().newInstance();
         } catch (Exception e) {
           LOG.warn("Initialize abort timeout task failed", e);
         }
   ```
   
   **log in product environtment**
   ```
   2019-08-16 18:01:40,737 [WARN ] HRegionServer:1046 Initialize abort timeout task failed
   java.lang.IllegalAccessException: Class org.apache.hadoop.hbase.regionserver.HRegionServer can not access a member of class org.apache.hadoop.hbase.regionss
        erver.HRegionServer$SystemExitWhenAbortTimeout with modifiers "private"
      at sun.reflect.Reflection.ensureMemberAccess(Reflection.java:102)
      at java.lang.reflect.AccessibleObject.slowCheckMemberAccess(AccessibleObject.java:296)
      at java.lang.reflect.AccessibleObject.checkAccess(AccessibleObject.java:288)
      at java.lang.reflect.Constructor.newInstance(Constructor.java:413)
      at org.apache.hadoop.hbase.regionserver.HRegionServer.run(HRegionServer.java:1044)
      at org.apache.hadoop.hbase.master.HMaster.run(HMaster.java:598)
   ```

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