HDFS-11551. Handle SlowDiskReport from DataNode at the NameNode. Contributed by Xiaobing Zhou.

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSOutputStream.java

@@ -72,6 +72,7 @@ import org.apache.hadoop.hdfs.protocol.datatransfer.DataTransferProtoUtil;
 import org.apache.hadoop.hdfs.protocol.datatransfer.IOStreamPair;
 import org.apache.hadoop.hdfs.protocol.datatransfer.InvalidEncryptionKeyException;
 import org.apache.hadoop.hdfs.protocol.datatransfer.PacketHeader;
+import org.apache.hadoop.hdfs.protocol.datatransfer.PacketReceiver;
 import org.apache.hadoop.hdfs.protocol.datatransfer.PipelineAck;
 import org.apache.hadoop.hdfs.protocol.datatransfer.Sender;
 import org.apache.hadoop.hdfs.protocol.proto.DataTransferProtos.BlockOpResponseProto;
@@ -101,6 +102,8 @@ import org.apache.htrace.Span;
 import org.apache.htrace.Trace;
 import org.apache.htrace.TraceInfo;
 import org.apache.htrace.TraceScope;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 import com.google.common.annotations.VisibleForTesting;
 import com.google.common.base.Preconditions;
@@ -137,6 +140,8 @@ import com.google.common.cache.RemovalNotification;
 public class DFSOutputStream extends FSOutputSummer
     implements Syncable, CanSetDropBehind {
   private final long dfsclientSlowLogThresholdMs;
+  static final Logger LOG = LoggerFactory.getLogger(DFSOutputStream.class);
+
   /**
    * Number of times to retry creating a file when there are transient 
    * errors (typically related to encryption zones and KeyProvider operations).
@@ -186,6 +191,7 @@ public class DFSOutputStream extends FSOutputSummer
   private FileEncryptionInfo fileEncryptionInfo;
   private static final BlockStoragePolicySuite blockStoragePolicySuite =
       BlockStoragePolicySuite.createDefaultSuite();
+  private int writePacketSize;
 
   /** Use {@link ByteArrayManager} to create buffer for non-heartbeat packets.*/
   private DFSPacket createPacket(int packetSize, int chunksPerPkt, long offsetInBlock,
@@ -1669,7 +1675,9 @@ public class DFSOutputStream extends FSOutputSummer
       DFSClient.LOG.debug(
           "Set non-null progress callback on DFSOutputStream " + src);
     }
-    
+
+    initWritePacketSize();
+
     this.bytesPerChecksum = checksum.getBytesPerChecksum();
     if (bytesPerChecksum <= 0) {
       throw new HadoopIllegalArgumentException(
@@ -1687,6 +1695,21 @@ public class DFSOutputStream extends FSOutputSummer
     this.byteArrayManager = dfsClient.getClientContext().getByteArrayManager();
   }
 
+  /**
+   * Ensures the configured writePacketSize never exceeds
+   * PacketReceiver.MAX_PACKET_SIZE.
+   */
+  private void initWritePacketSize() {
+    writePacketSize = dfsClient.getConf().writePacketSize;
+    if (writePacketSize > PacketReceiver.MAX_PACKET_SIZE) {
+      LOG.warn(
+          "Configured write packet exceeds {} bytes as max,"
+              + " using {} bytes.",
+          PacketReceiver.MAX_PACKET_SIZE, PacketReceiver.MAX_PACKET_SIZE);
+      writePacketSize = PacketReceiver.MAX_PACKET_SIZE;
+    }
+  }
+
   /** Construct a new output stream for creating a file. */
   private DFSOutputStream(DFSClient dfsClient, String src, HdfsFileStatus stat,
       EnumSet<CreateFlag> flag, Progressable progress,
@@ -1936,18 +1959,8 @@ public class DFSOutputStream extends FSOutputSummer
       }
       waitAndQueueCurrentPacket();
 
-      // If the reopened file did not end at chunk boundary and the above
-      // write filled up its partial chunk. Tell the summer to generate full 
-      // crc chunks from now on.
-      if (appendChunk && bytesCurBlock%bytesPerChecksum == 0) {
-        appendChunk = false;
-        resetChecksumBufSize();
-      }
+      adjustChunkBoundary();
 
-      if (!appendChunk) {
-        int psize = Math.min((int)(blockSize-bytesCurBlock), dfsClient.getConf().writePacketSize);
-        computePacketChunkSize(psize, bytesPerChecksum);
-      }
       //
       // if encountering a block boundary, send an empty packet to 
       // indicate the end of block and reset bytesCurBlock.
@@ -1962,6 +1975,40 @@ public class DFSOutputStream extends FSOutputSummer
     }
   }
 
+  /**
+   * If the reopened file did not end at chunk boundary and the above
+   * write filled up its partial chunk. Tell the summer to generate full
+   * crc chunks from now on.
+   */
+  protected void adjustChunkBoundary() {
+    if (appendChunk && bytesCurBlock % bytesPerChecksum == 0) {
+      appendChunk = false;
+      resetChecksumBufSize();
+    }
+
+    if (!appendChunk) {
+      final int psize = (int) Math.min(blockSize - bytesCurBlock,
+          writePacketSize);
+      computePacketChunkSize(psize, bytesPerChecksum);
+    }
+  }
+
+  /**
+   * Used in test only.
+   */
+  @VisibleForTesting
+  void setAppendChunk(final boolean appendChunk) {
+    this.appendChunk = appendChunk;
+  }
+
+  /**
+   * Used in test only.
+   */
+  @VisibleForTesting
+  void setBytesCurBlock(final long bytesCurBlock) {
+    this.bytesCurBlock = bytesCurBlock;
+  }
+
   @Deprecated
   public void sync() throws IOException {
     hflush();

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/protocol/datatransfer/PacketReceiver.java

@@ -45,7 +45,7 @@ public class PacketReceiver implements Closeable {
    * The max size of any single packet. This prevents OOMEs when
    * invalid data is sent.
    */
-  private static final int MAX_PACKET_SIZE = 16 * 1024 * 1024;
+  public static final int MAX_PACKET_SIZE = 16 * 1024 * 1024;
 
   static final Log LOG = LogFactory.getLog(PacketReceiver.class);
   

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

@@ -17,20 +17,28 @@
  */
 package org.apache.hadoop.hdfs;
 
+import java.io.File;
 import java.io.IOException;
 import java.lang.reflect.Field;
+import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
 import java.util.concurrent.atomic.AtomicReference;
 
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.FSDataOutputStream;
 import org.apache.hadoop.fs.Path;
+import org.apache.hadoop.hdfs.protocol.datatransfer.PacketReceiver;
+import org.apache.hadoop.test.GenericTestUtils;
+import org.apache.hadoop.test.PathUtils;
 import org.junit.AfterClass;
 import org.junit.Assert;
 import org.junit.BeforeClass;
 import org.junit.Test;
 import org.mockito.internal.util.reflection.Whitebox;
 
+import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_CLIENT_WRITE_PACKET_SIZE_DEFAULT;
+import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_CLIENT_WRITE_PACKET_SIZE_KEY;
+
 public class TestDFSOutputStream {
   static MiniDFSCluster cluster;
 
@@ -97,6 +105,124 @@ public class TestDFSOutputStream {
     Assert.assertTrue((Integer) field.get(dos) + 257 < packetSize);
   }
 
+  /**
+   * This tests preventing overflows of package size and bodySize.
+   * <p>
+   * See also https://issues.apache.org/jira/browse/HDFS-11608.
+   * </p>
+   * @throws IOException
+   * @throws SecurityException
+   * @throws NoSuchFieldException
+   * @throws InvocationTargetException
+   * @throws IllegalArgumentException
+   * @throws IllegalAccessException
+   * @throws NoSuchMethodException
+   */
+  @Test(timeout=60000)
+  public void testPreventOverflow() throws IOException, NoSuchFieldException,
+      SecurityException, IllegalAccessException, IllegalArgumentException,
+      InvocationTargetException, NoSuchMethodException {
+
+    final int defaultWritePacketSize = DFS_CLIENT_WRITE_PACKET_SIZE_DEFAULT;
+    int configuredWritePacketSize = defaultWritePacketSize;
+    int finalWritePacketSize = defaultWritePacketSize;
+
+    /* test default WritePacketSize, e.g. 64*1024 */
+    runAdjustChunkBoundary(configuredWritePacketSize, finalWritePacketSize);
+
+    /* test large WritePacketSize, e.g. 1G */
+    configuredWritePacketSize = 1000 * 1024 * 1024;
+    finalWritePacketSize = PacketReceiver.MAX_PACKET_SIZE;
+    runAdjustChunkBoundary(configuredWritePacketSize, finalWritePacketSize);
+  }
+
+  /**
+   * @configuredWritePacketSize the configured WritePacketSize.
+   * @finalWritePacketSize the final WritePacketSize picked by
+   *                       {@link DFSOutputStream#adjustChunkBoundary}
+   */
+  private void runAdjustChunkBoundary(
+      final int configuredWritePacketSize,
+      final int finalWritePacketSize) throws IOException, NoSuchFieldException,
+      SecurityException, IllegalAccessException, IllegalArgumentException,
+      InvocationTargetException, NoSuchMethodException {
+
+    final boolean appendChunk = false;
+    final long blockSize = 3221225500L;
+    final long bytesCurBlock = 1073741824L;
+    final int bytesPerChecksum = 512;
+    final int checksumSize = 4;
+    final int chunkSize = bytesPerChecksum + checksumSize;
+    final int packateMaxHeaderLength = 33;
+
+    MiniDFSCluster dfsCluster = null;
+    final File baseDir = new File(PathUtils.getTestDir(getClass()),
+        GenericTestUtils.getMethodName());
+
+    try {
+      final Configuration dfsConf = new Configuration();
+      dfsConf.set(MiniDFSCluster.HDFS_MINIDFS_BASEDIR,
+          baseDir.getAbsolutePath());
+      dfsConf.setInt(DFS_CLIENT_WRITE_PACKET_SIZE_KEY,
+          configuredWritePacketSize);
+      dfsCluster = new MiniDFSCluster.Builder(dfsConf).numDataNodes(1).build();
+      dfsCluster.waitActive();
+
+      final FSDataOutputStream os = dfsCluster.getFileSystem()
+          .create(new Path(baseDir.getAbsolutePath(), "testPreventOverflow"));
+      final DFSOutputStream dos = (DFSOutputStream) Whitebox
+          .getInternalState(os, "wrappedStream");
+
+      /* set appendChunk */
+      final Method setAppendChunkMethod = dos.getClass()
+          .getDeclaredMethod("setAppendChunk", boolean.class);
+      setAppendChunkMethod.setAccessible(true);
+      setAppendChunkMethod.invoke(dos, appendChunk);
+
+      /* set bytesCurBlock */
+      final Method setBytesCurBlockMethod = dos.getClass()
+          .getDeclaredMethod("setBytesCurBlock", long.class);
+      setBytesCurBlockMethod.setAccessible(true);
+      setBytesCurBlockMethod.invoke(dos, bytesCurBlock);
+
+      /* set blockSize */
+      final Field blockSizeField = dos.getClass().getDeclaredField("blockSize");
+      blockSizeField.setAccessible(true);
+      blockSizeField.setLong(dos, blockSize);
+
+      /* call adjustChunkBoundary */
+      final Method method = dos.getClass()
+          .getDeclaredMethod("adjustChunkBoundary");
+      method.setAccessible(true);
+      method.invoke(dos);
+
+      /* get and verify writePacketSize */
+      final Field writePacketSizeField = dos.getClass()
+          .getDeclaredField("writePacketSize");
+      writePacketSizeField.setAccessible(true);
+      Assert.assertEquals(writePacketSizeField.getInt(dos),
+          finalWritePacketSize);
+
+      /* get and verify chunksPerPacket */
+      final Field chunksPerPacketField = dos.getClass()
+          .getDeclaredField("chunksPerPacket");
+      chunksPerPacketField.setAccessible(true);
+      Assert.assertEquals(chunksPerPacketField.getInt(dos),
+          (finalWritePacketSize - packateMaxHeaderLength) / chunkSize);
+
+      /* get and verify packetSize */
+      final Field packetSizeField = dos.getClass()
+          .getDeclaredField("packetSize");
+      packetSizeField.setAccessible(true);
+      Assert.assertEquals(packetSizeField.getInt(dos),
+          chunksPerPacketField.getInt(dos) * chunkSize);
+    } finally {
+      if (dfsCluster != null) {
+        dfsCluster.shutdown();
+      }
+    }
+  }
+
   @AfterClass
   public static void tearDown() {
     cluster.shutdown();