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HDFS-4813. Add volatile to BlocksMap.blocks so that the replication thread can see the updated value. Contributed by Jing Zhao

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git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1482658 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Tsz-wo Sze 2013-05-15 02:18:27 +00:00
parent 4d8e350750
commit 5c82a0cd1a
3 changed files with 5 additions and 4 deletions
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3
hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
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@ -995,6 +995,9 @@ Release 2.0.5-beta - UNRELEASED
HDFS-4300. TransferFsImage.downloadEditsToStorage should use a tmp file for
destination. (Andrew Wang via atm)
HDFS-4813. Add volatile to BlocksMap.blocks so that the replication thread
can see the updated value. (Jing Zhao via szetszwo)
Release 2.0.4-alpha - 2013-04-25
INCOMPATIBLE CHANGES

4
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockManager.java
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@ -59,11 +59,10 @@
import org.apache.hadoop.hdfs.server.blockmanagement.PendingDataNodeMessages.ReportedBlockInfo;
import org.apache.hadoop.hdfs.server.common.HdfsServerConstants.BlockUCState;
import org.apache.hadoop.hdfs.server.common.HdfsServerConstants.ReplicaState;
import org.apache.hadoop.hdfs.server.blockmanagement.DatanodeDescriptor;
import org.apache.hadoop.hdfs.server.namenode.FSClusterStats;
import org.apache.hadoop.hdfs.server.namenode.NameNode;
import org.apache.hadoop.hdfs.server.namenode.Namesystem;
import org.apache.hadoop.hdfs.server.namenode.NameNode.OperationCategory;
import org.apache.hadoop.hdfs.server.namenode.Namesystem;
import org.apache.hadoop.hdfs.server.namenode.metrics.NameNodeMetrics;
import org.apache.hadoop.hdfs.server.protocol.BlockCommand;
import org.apache.hadoop.hdfs.server.protocol.BlocksWithLocations;
@ -73,7 +72,6 @@
import org.apache.hadoop.hdfs.server.protocol.ReceivedDeletedBlockInfo;
import org.apache.hadoop.hdfs.util.LightWeightLinkedSet;
import org.apache.hadoop.net.Node;
import org.apache.hadoop.net.NodeBase;
import org.apache.hadoop.util.Daemon;
import org.apache.hadoop.util.Time;

2
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlocksMap.java
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@ -57,7 +57,7 @@ public void remove() {
/** Constant {@link LightWeightGSet} capacity. */
private final int capacity;
private GSet<Block, BlockInfo> blocks;
private volatile GSet<Block, BlockInfo> blocks;
BlocksMap(final float loadFactor) {
// Use 2% of total memory to size the GSet capacity