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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