Github user joshelser commented on the issue:

    https://github.com/apache/accumulo/pull/154
  
    Uh oh. Looks like we have a failure in ReadWriteIT#sunnyDay()
    
    ```
    Tests run: 8, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 160.031 sec 
<<< FAILURE! - in org.apache.accumulo.test.functional.ReadWriteIT
    sunnyDay(org.apache.accumulo.test.functional.ReadWriteIT)  Time elapsed: 
14.882 sec  <<< ERROR!
    java.io.IOException: Failed to run `accumulo admin stopAll`
        at 
org.apache.accumulo.test.functional.ReadWriteIT.sunnyDay(ReadWriteIT.java:169)
    ```
    
    ```
    2016-09-21 12:18:57,587 [util.Admin] ERROR: java.io.IOException: Attempted 
to prompt user on the console when System.console = null
    java.lang.RuntimeException: java.io.IOException: Attempted to prompt user 
on the console when System.console = null
            at 
org.apache.accumulo.core.cli.ClientOpts.getToken(ClientOpts.java:171)
            at org.apache.accumulo.server.util.Admin.execute(Admin.java:213)
            at org.apache.accumulo.server.util.Admin.main(Admin.java:154)
            at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
            at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
            at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
            at java.lang.reflect.Method.invoke(Method.java:497)
            at org.apache.accumulo.start.Main$2.run(Main.java:157)
            at java.lang.Thread.run(Thread.java:745)
    Caused by: java.io.IOException: Attempted to prompt user on the console 
when System.console = null
            at 
org.apache.accumulo.core.cli.ClientOpts$Password.promptUser(ClientOpts.java:105)
            at 
org.apache.accumulo.core.cli.ClientOpts.getToken(ClientOpts.java:169)
            ... 8 more
    ```
    
    Kind of seems like we don't have a good understanding of commands/tools 
which need a username + credentials (password) and which don't. Maybe that's 
how we need to address the problem?


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