CheckHdfsIndexTest fail.

   [junit4]   2> NOTE: reproduce with: ant test  -Dtestcase=CheckHdfsIndexTest -Dtests.method=doTest -Dtests.seed=C045205F24FEF89C -Dtests.slow=true -Dtests.locale=es-NI -Dtests.timezone=Etc/GMT+8 -Dtests.asserts=true -Dtests.file.encoding=ISO-8859-1
   [junit4] ERROR   10.2s J8  | CheckHdfsIndexTest.doTest <<<
   [junit4]    > Throwable #1: com.carrotsearch.randomizedtesting.UncaughtExceptionError: Captured an uncaught exception in thread: Thread[id=1637, name=Thread-391, state=RUNNABLE, group=TGRP-CheckHdfsIndexTest]
   [junit4]    > Caused by: java.lang.NullPointerException
   [junit4]    > 	at __randomizedtesting.SeedInfo.seed([C045205F24FEF89C]:0)
   [junit4]    > 	at org.apache.hadoop.fs.DU.<init>(DU.java:74)
   [junit4]    > 	at org.apache.hadoop.fs.DU.<init>(DU.java:95)
   [junit4]    > 	at org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.BlockPoolSlice.<init>(BlockPoolSlice.java:140)
   [junit4]    > 	at org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsVolumeImpl.addBlockPool(FsVolumeImpl.java:827)
   [junit4]    > 	at org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsVolumeList$2.run(FsVolumeList.java:405)Throwable #2: com.carrotsearch.randomizedtesting.UncaughtExceptionError: Captured an uncaught exception in thread: Thread[id=1635, name=Thread-389, state=RUNNABLE, group=TGRP-CheckHdfsIndexTest]
   [junit4]    > Caused by: java.lang.NullPointerException
   [junit4]    > 	at __randomizedtesting.SeedInfo.seed([C045205F24FEF89C]:0)
   [junit4]    > 	at org.apache.hadoop.fs.DU.<init>(DU.java:74)
   [junit4]    > 	at org.apache.hadoop.fs.DU.<init>(DU.java:95)
   [junit4]    > 	at org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.BlockPoolSlice.<init>(BlockPoolSlice.java:140)
   [junit4]    > 	at org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsVolumeImpl.addBlockPool(FsVolumeImpl.java:827)
   [junit4]    > 	at org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsVolumeList$2.run(FsVolumeList.java:405)