HDFS-7282. Fix intermittent TestShortCircuitCache and TestBlockReaderFactory failures resulting from TemporarySocketDirectory GC (Jinghui Wang via Colin P. McCabe)

(cherry picked from commit 518a7f4af3d8deeecabfa0629b16521ce09de459)

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

@@ -93,6 +93,10 @@ Release 2.7.0 - UNRELEASED
     HDFS-7258. CacheReplicationMonitor rescan schedule log should use DEBUG
     level instead of INFO level. (Xiaoyu Yao via wheat9)
 
+    HDFS-7282. Fix intermittent TestShortCircuitCache and
+    TestBlockReaderFactory failures resulting from TemporarySocketDirectory GC.
+    (Jinghui Wang via Colin Patrick McCabe)
+
 Release 2.6.0 - UNRELEASED
 
   INCOMPATIBLE CHANGES

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestBlockReaderFactory.java

@@ -343,6 +343,7 @@ public class TestBlockReaderFactory {
       }
     });
     cluster.shutdown();
+    sockDir.close();
   }
  
   /**
@@ -378,6 +379,7 @@ public class TestBlockReaderFactory {
         fs.dfs.getClientContext().getShortCircuitCache();
     Assert.assertEquals(null, cache.getDfsClientShmManager());
     cluster.shutdown();
+    sockDir.close();
   }
   
   /**
@@ -411,6 +413,7 @@ public class TestBlockReaderFactory {
     Assert.assertTrue(cache.getDfsClientShmManager().
         getDomainSocketWatcher().isClosed());
     cluster.shutdown();
+    sockDir.close();
   }
 
   /**

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/shortcircuit/TestShortCircuitCache.java

@@ -519,6 +519,7 @@ public class TestShortCircuitCache {
       }
     });
     cluster.shutdown();
+    sockDir.close();
   }
 
   /**