Merge branch 'trunk' into YARN-11250

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/compress/AlreadyClosedException.java

@@ -0,0 +1,33 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.hadoop.io.compress;
+
+import java.io.IOException;
+
+/**
+ * An exception class for when a closed compressor/decopressor is being used
+ * {@link org.apache.hadoop.io.compress.Compressor}
+ * {@link org.apache.hadoop.io.compress.Decompressor}
+ */
+public class AlreadyClosedException extends IOException {
+
+  public AlreadyClosedException(String message) {
+    super(message);
+  }
+}

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/compress/CodecPool.java

@@ -205,6 +205,7 @@ public static void returnCompressor(Compressor compressor) {
     }
     // if the compressor can't be reused, don't pool it.
     if (compressor.getClass().isAnnotationPresent(DoNotPool.class)) {
+      compressor.end();
       return;
     }
     compressor.reset();
@@ -225,6 +226,7 @@ public static void returnDecompressor(Decompressor decompressor) {
     }
     // if the decompressor can't be reused, don't pool it.
     if (decompressor.getClass().isAnnotationPresent(DoNotPool.class)) {
+      decompressor.end();
       return;
     }
     decompressor.reset();

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/compress/zlib/BuiltInGzipCompressor.java

@@ -24,6 +24,7 @@
 import java.util.zip.GZIPOutputStream;
 
 import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.io.compress.AlreadyClosedException;
 import org.apache.hadoop.io.compress.Compressor;
 import org.apache.hadoop.io.compress.DoNotPool;
 import org.apache.hadoop.util.DataChecksum;
@@ -83,6 +84,10 @@ public int compress(byte[] b, int off, int len) throws IOException {
       throw new IOException("compress called on finished compressor");
     }
 
+    if (state == BuiltInGzipDecompressor.GzipStateLabel.ENDED) {
+      throw new AlreadyClosedException("compress called on closed compressor");
+    }
+
     int compressedBytesWritten = 0;
 
     // If we are not within uncompressed data yet, output the header.
@@ -139,6 +144,8 @@ public long getBytesWritten() {
   @Override
   public void end() {
     deflater.end();
+
+    state = BuiltInGzipDecompressor.GzipStateLabel.ENDED;
   }
 
   @Override

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/compress/zlib/BuiltInGzipDecompressor.java

@@ -23,6 +23,7 @@
 import java.util.zip.DataFormatException;
 import java.util.zip.Inflater;
 
+import org.apache.hadoop.io.compress.AlreadyClosedException;
 import org.apache.hadoop.io.compress.Decompressor;
 import org.apache.hadoop.io.compress.DoNotPool;
 import org.apache.hadoop.util.DataChecksum;
@@ -109,7 +110,11 @@ public enum GzipStateLabel {
      * Immediately after the trailer (and potentially prior to the next gzip
      * member/substream header), without reset() having been called.
      */
-    FINISHED;
+    FINISHED,
+    /**
+     * Immediately after end() has been called.
+     */
+    ENDED;
   }
 
   /**
@@ -186,6 +191,10 @@ public synchronized int decompress(byte[] b, int off, int len)
   throws IOException {
     int numAvailBytes = 0;
 
+    if (state == GzipStateLabel.ENDED) {
+      throw new AlreadyClosedException("decompress called on closed decompressor");
+    }
+
     if (state != GzipStateLabel.DEFLATE_STREAM) {
       executeHeaderState();
 
@@ -476,6 +485,8 @@ public synchronized void reset() {
   @Override
   public synchronized void end() {
     inflater.end();
+
+    state = GzipStateLabel.ENDED;
   }
 
   /**

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/Shell.java

@@ -60,7 +60,7 @@ public abstract class Shell {
    * {@value}
    */
   private static final String WINDOWS_PROBLEMS =
-      "https://wiki.apache.org/hadoop/WindowsProblems";
+      "https://cwiki.apache.org/confluence/display/HADOOP2/WindowsProblems";
 
   /**
    * Name of the windows utils binary: {@value}.

hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/io/compress/TestCodecPool.java

@@ -19,13 +19,20 @@
 
 import static org.junit.Assert.assertEquals;
 
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.OutputStream;
+import java.util.Random;
 import java.util.concurrent.Callable;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 import java.util.concurrent.LinkedBlockingDeque;
 import java.util.concurrent.TimeUnit;
 
 import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.io.compress.zlib.BuiltInGzipCompressor;
+import org.apache.hadoop.io.compress.zlib.BuiltInGzipDecompressor;
+import org.apache.hadoop.test.LambdaTestUtils;
 import org.junit.Before;
 import org.junit.Test;
 
@@ -189,4 +196,56 @@ public void testDecompressorNotReturnSameInstance() {
       CodecPool.returnDecompressor(decompressor);
     }
   }
+
+  @Test(timeout = 10000)
+  public void testDoNotPoolCompressorNotUseableAfterReturn() throws Exception {
+
+    final GzipCodec gzipCodec = new GzipCodec();
+    gzipCodec.setConf(new Configuration());
+
+    // BuiltInGzipCompressor is an explicit example of a Compressor with the @DoNotPool annotation
+    final Compressor compressor = new BuiltInGzipCompressor(new Configuration());
+    CodecPool.returnCompressor(compressor);
+
+    final CompressionOutputStream outputStream =
+            gzipCodec.createOutputStream(new ByteArrayOutputStream(), compressor);
+    LambdaTestUtils.intercept(
+            AlreadyClosedException.class,
+            "compress called on closed compressor",
+            "Compressor from Codec with @DoNotPool should not be " +
+                    "useable after returning to CodecPool",
+        () -> outputStream.write(1));
+  }
+
+  @Test(timeout = 10000)
+  public void testDoNotPoolDecompressorNotUseableAfterReturn() throws Exception {
+
+    final GzipCodec gzipCodec = new GzipCodec();
+    gzipCodec.setConf(new Configuration());
+
+    final Random random = new Random();
+    final byte[] bytes = new byte[1024];
+    random.nextBytes(bytes);
+
+    ByteArrayOutputStream baos = new ByteArrayOutputStream();
+    try (OutputStream outputStream = gzipCodec.createOutputStream(baos)) {
+      outputStream.write(bytes);
+    }
+
+    final byte[] gzipBytes = baos.toByteArray();
+    final ByteArrayInputStream bais = new ByteArrayInputStream(gzipBytes);
+
+    // BuiltInGzipDecompressor is an explicit example of a Decompressor
+    // with the @DoNotPool annotation
+    final Decompressor decompressor = new BuiltInGzipDecompressor();
+    CodecPool.returnDecompressor(decompressor);
+
+    final CompressionInputStream inputStream = gzipCodec.createInputStream(bais, decompressor);
+    LambdaTestUtils.intercept(
+            AlreadyClosedException.class,
+            "decompress called on closed decompressor",
+            "Decompressor from Codec with @DoNotPool should not be " +
+                    "useable after returning to CodecPool",
+        () -> inputStream.read());
+  }
 }

hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/metrics/RBFMetrics.java

@@ -50,6 +50,7 @@
 import javax.management.ObjectName;
 import javax.management.StandardMBean;
 
+import org.apache.commons.math3.stat.descriptive.moment.StandardDeviation;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.hdfs.protocol.DatanodeInfo;
 import org.apache.hadoop.hdfs.protocol.HdfsConstants.DatanodeReportType;
@@ -113,6 +114,8 @@ public class RBFMetrics implements RouterMBean, FederationMBean {
   /** Prevent holding the page from load too long. */
   private final long timeOut;
 
+  /** Enable/Disable getNodeUsage. **/
+  private boolean enableGetDNUsage;
 
   /** Router interface. */
   private final Router router;
@@ -175,6 +178,8 @@ public RBFMetrics(Router router) throws IOException {
     Configuration conf = router.getConfig();
     this.timeOut = conf.getTimeDuration(RBFConfigKeys.DN_REPORT_TIME_OUT,
         RBFConfigKeys.DN_REPORT_TIME_OUT_MS_DEFAULT, TimeUnit.MILLISECONDS);
+    this.enableGetDNUsage = conf.getBoolean(RBFConfigKeys.DFS_ROUTER_ENABLE_GET_DN_USAGE_KEY,
+        RBFConfigKeys.DFS_ROUTER_ENABLE_GET_DN_USAGE_DEFAULT);
     this.topTokenRealOwners = conf.getInt(
         RBFConfigKeys.DFS_ROUTER_METRICS_TOP_NUM_TOKEN_OWNERS_KEY,
         RBFConfigKeys.DFS_ROUTER_METRICS_TOP_NUM_TOKEN_OWNERS_KEY_DEFAULT);
@@ -184,6 +189,11 @@ public RBFMetrics(Router router) throws IOException {
     ms.register(RBFMetrics.class.getName(), "RBFActivity Metrics", this);
   }
 
+  @VisibleForTesting
+  public void setEnableGetDNUsage(boolean enableGetDNUsage) {
+    this.enableGetDNUsage = enableGetDNUsage;
+  }
+
   /**
    * Unregister the JMX beans.
    */
@@ -537,35 +547,34 @@ public int getNumEnteringMaintenanceDataNodes() {
 
   @Override // NameNodeMXBean
   public String getNodeUsage() {
-    float median = 0;
-    float max = 0;
-    float min = 0;
-    float dev = 0;
+    double median = 0;
+    double max = 0;
+    double min = 0;
+    double dev = 0;
 
     final Map<String, Map<String, Object>> info = new HashMap<>();
     try {
-      RouterRpcServer rpcServer = this.router.getRpcServer();
-      DatanodeInfo[] live = rpcServer.getDatanodeReport(
-          DatanodeReportType.LIVE, false, timeOut);
+      DatanodeInfo[] live = null;
+      if (this.enableGetDNUsage) {
+        RouterRpcServer rpcServer = this.router.getRpcServer();
+        live = rpcServer.getDatanodeReport(DatanodeReportType.LIVE, false, timeOut);
+      } else {
+        LOG.debug("Getting node usage is disabled.");
+      }
 
-      if (live.length > 0) {
-        float totalDfsUsed = 0;
-        float[] usages = new float[live.length];
+      if (live != null && live.length > 0) {
+        double[] usages = new double[live.length];
         int i = 0;
         for (DatanodeInfo dn : live) {
           usages[i++] = dn.getDfsUsedPercent();
-          totalDfsUsed += dn.getDfsUsedPercent();
         }
-        totalDfsUsed /= live.length;
         Arrays.sort(usages);
         median = usages[usages.length / 2];
         max = usages[usages.length - 1];
         min = usages[0];
 
-        for (i = 0; i < usages.length; i++) {
-          dev += (usages[i] - totalDfsUsed) * (usages[i] - totalDfsUsed);
-        }
-        dev = (float) Math.sqrt(dev / usages.length);
+        StandardDeviation deviation = new StandardDeviation();
+        dev = deviation.evaluate(usages);
       }
     } catch (IOException e) {
       LOG.error("Cannot get the live nodes: {}", e.getMessage());