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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