HDDS-11635. Memory leak when using Ozone FS via Hadoop FileContext API (#7382)

(cherry picked from commit c7a196f)

Author: aekom87

hadoop-ozone/ozonefs-common/src/main/java/org/apache/hadoop/fs/ozone/BasicOzFs.java

@@ -46,4 +46,13 @@ public BasicOzFs(URI theUri, Configuration conf)
   public int getUriDefaultPort() {
     return -1;
   }
+
+  /**
+   * Close the file system; the FileContext API doesn't have an explicit close.
+   */
+  @Override
+  protected void finalize() throws Throwable {
+    fsImpl.close();
+    super.finalize();
+  }
 }

hadoop-ozone/ozonefs-hadoop2/src/main/java/org/apache/hadoop/fs/ozone/OzFs.java

@@ -45,4 +45,13 @@ public OzFs(URI theUri, Configuration conf)
   public int getUriDefaultPort() {
     return -1;
   }
+
+  /**
+   * Close the file system; the FileContext API doesn't have an explicit close.
+   */
+  @Override
+  protected void finalize() throws Throwable {
+    fsImpl.close();
+    super.finalize();
+  }
 }

hadoop-ozone/ozonefs-hadoop2/src/main/java/org/apache/hadoop/fs/ozone/RootedOzFs.java

@@ -46,4 +46,13 @@ public RootedOzFs(URI theUri, Configuration conf)
   public int getUriDefaultPort() {
     return -1;
   }
+
+  /**
+   * Close the file system; the FileContext API doesn't have an explicit close.
+   */
+  @Override
+  protected void finalize() throws Throwable {
+    fsImpl.close();
+    super.finalize();
+  }
 }

hadoop-ozone/ozonefs-hadoop3/src/main/java/org/apache/hadoop/fs/ozone/OzFs.java

@@ -40,4 +40,13 @@ public OzFs(URI theUri, Configuration conf)
     super(theUri, new OzoneFileSystem(), conf,
         OzoneConsts.OZONE_URI_SCHEME, false);
   }
+
+  /**
+   * Close the file system; the FileContext API doesn't have an explicit close.
+   */
+  @Override
+  protected void finalize() throws Throwable {
+    fsImpl.close();
+    super.finalize();
+  }
 }

hadoop-ozone/ozonefs-hadoop3/src/main/java/org/apache/hadoop/fs/ozone/RootedOzFs.java

@@ -41,4 +41,13 @@ public RootedOzFs(URI theUri, Configuration conf)
     super(theUri, new RootedOzoneFileSystem(), conf,
         OzoneConsts.OZONE_OFS_URI_SCHEME, false);
   }
+
+  /**
+   * Close the file system; the FileContext API doesn't have an explicit close.
+   */
+  @Override
+  protected void finalize() throws Throwable {
+    fsImpl.close();
+    super.finalize();
+  }
 }

hadoop-ozone/ozonefs/src/main/java/org/apache/hadoop/fs/ozone/OzFs.java

@@ -41,4 +41,13 @@ public OzFs(URI theUri, Configuration conf)
     super(theUri, new OzoneFileSystem(), conf,
         OzoneConsts.OZONE_URI_SCHEME, false);
   }
+
+  /**
+   * Close the file system; the FileContext API doesn't have an explicit close.
+   */
+  @Override
+  protected void finalize() throws Throwable {
+    fsImpl.close();
+    super.finalize();
+  }
 }

hadoop-ozone/ozonefs/src/main/java/org/apache/hadoop/fs/ozone/RootedOzFs.java

@@ -41,4 +41,13 @@ public RootedOzFs(URI theUri, Configuration conf)
     super(theUri, new RootedOzoneFileSystem(), conf,
         OzoneConsts.OZONE_OFS_URI_SCHEME, false);
   }
+
+  /**
+   * Close the file system; the FileContext API doesn't have an explicit close.
+   */
+  @Override
+  protected void finalize() throws Throwable {
+    fsImpl.close();
+    super.finalize();
+  }
 }