Github user joshelser commented on a diff in the pull request:

    https://github.com/apache/accumulo/pull/283#discussion_r129616922
  
    --- Diff: 
core/src/main/java/org/apache/accumulo/core/file/rfile/bcfile/BoundedRangeFileInputStream.java
 ---
    @@ -95,18 +92,7 @@ public int read(final byte[] b, final int off, int len) 
throws IOException {
             throw new IOException("Stream closed");
           }
           in.seek(pos);
    -      try {
    -        ret = AccessController.doPrivileged(new 
PrivilegedExceptionAction<Integer>() {
    --- End diff --
    
    This is the one change which I'm not quite sure about.
    
    It having been there since the dawn of time and without comment, I'm really 
not sure what it was intended to do. This predates all of the Kerberos work -- 
the only thing I can think of would have been the old SecurityManager 
constraints (but, if memory serves, those were more around SKVI's, not reading 
data from HDFS).
    
    @billierinaldi, @keith-turner, @ericnewton, @scubafuchs: any guesses? :)


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