HDFS-7951. Fix NPE for TestFsDatasetImpl#testAddVolumeFailureReleasesInUseLock on Linux. (Contributed by Xiaoyu Yao)

hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt

@@ -861,6 +861,10 @@ Release 2.7.0 - UNRELEASED
     HDFS-7950. Fix TestFsDatasetImpl#testAddVolumes failure on Windows.
     (Xiaoyu Yao via Arpit Agarwal)
 
+    HDFS-7951. Fix NPE for
+    TestFsDatasetImpl#testAddVolumeFailureReleasesInUseLock on Linux
+    (Xiaoyu Yao via Arpit Agarwal)
+
     BREAKDOWN OF HDFS-7584 SUBTASKS AND RELATED JIRAS
 
       HDFS-7720. Quota by Storage Type API, tools and ClientNameNode

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/TestFsDatasetImpl.java

@@ -330,7 +330,7 @@ public class TestFsDatasetImpl {
     Storage.StorageDirectory sd = createStorageDirectory(badDir);
     sd.lock();
     DataStorage.VolumeBuilder builder = new DataStorage.VolumeBuilder(storage, sd);
-    when(storage.prepareVolume(eq(datanode), eq(badDir),
+    when(storage.prepareVolume(eq(datanode), eq(badDir.getAbsoluteFile()),
         Matchers.<List<NamespaceInfo>>any()))
         .thenReturn(builder);