[jira] [Created] (HDFS-15072) HDFS MiniCluster fails to start when run in directory path with a %

["Geoffrey Jacoby (Jira)" <ji...@apache.org>]

Geoffrey Jacoby created HDFS-15072:
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             Summary: HDFS MiniCluster fails to start when run in directory path with a %
                 Key: HDFS-15072
                 URL: https://issues.apache.org/jira/browse/HDFS-15072
             Project: Hadoop HDFS
          Issue Type: Bug
    Affects Versions: 2.7.5
         Environment: I encountered this on a Mac while running an HBase minicluster that was using Hadoop 2.7.5. However, the code looks the same in trunk so it likely affects most or all current versions. 
            Reporter: Geoffrey Jacoby


FSVolumeImpl.initializeCacheExecutor calls Guava's ThreadPoolExecutorBuilder. setNameFormat, passing in the String representation of the parent File. Guava will take the String whole and pass it to String.format, which uses % as a special character. That means that if parent.toString() contains a percentage sign, followed by a character that's illegal to use as a formatter in String.format(), you'll get an exception that stops the MiniCluster from starting up. 

I did not check to see if this would also happen on a normal DataNode daemon. 

initializeCacheExecutor should escape the parent file name before passing it in. 



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