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HDFS-8794. Improve CorruptReplicasMap#corruptReplicasMap. (yliu)

This commit is contained in:
yliu 2015-07-21 09:20:22 +08:00
parent ed01dc70b2
commit d6d58606b8
3 changed files with 22 additions and 11 deletions
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2
hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
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@ -727,6 +727,8 @@ Release 2.8.0 - UNRELEASED
HDFS-7314. When the DFSClient lease cannot be renewed, abort open-for-write
files rather than the entire DFSClient. (mingma)
HDFS-8794. Improve CorruptReplicasMap#corruptReplicasMap. (yliu)
OPTIMIZATIONS
HDFS-8026. Trace FSOutputSummer#writeChecksumChunks rather than

19
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/CorruptReplicasMap.java
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@ -17,12 +17,19 @@
*/
package org.apache.hadoop.hdfs.server.blockmanagement;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.TreeMap;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.hdfs.protocol.Block;
import org.apache.hadoop.hdfs.server.namenode.NameNode;
import org.apache.hadoop.ipc.Server;
import java.util.*;
import com.google.common.annotations.VisibleForTesting;
/**
* Stores information about all corrupt blocks in the File System.
@ -46,8 +53,8 @@ public class CorruptReplicasMap{
CORRUPTION_REPORTED // client or datanode reported the corruption
}
private final SortedMap<Block, Map<DatanodeDescriptor, Reason>> corruptReplicasMap =
new TreeMap<Block, Map<DatanodeDescriptor, Reason>>();
private final Map<Block, Map<DatanodeDescriptor, Reason>> corruptReplicasMap =
new HashMap<Block, Map<DatanodeDescriptor, Reason>>();
/**
* Mark the block belonging to datanode as corrupt.
@ -181,13 +188,15 @@ public class CorruptReplicasMap{
* @return Up to numExpectedBlocks blocks from startingBlockId if it exists
*
*/
long[] getCorruptReplicaBlockIds(int numExpectedBlocks,
@VisibleForTesting
long[] getCorruptReplicaBlockIdsForTesting(int numExpectedBlocks,
Long startingBlockId) {
if (numExpectedBlocks < 0 || numExpectedBlocks > 100) {
return null;
}
Iterator<Block> blockIt = corruptReplicasMap.keySet().iterator();
Iterator<Block> blockIt =
new TreeMap<>(corruptReplicasMap).keySet().iterator();
// if the starting block id was specified, iterate over keys until
// we find the matching block. If we find a matching block, break

12
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/TestCorruptReplicaInfo.java
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@ -73,9 +73,9 @@ public class TestCorruptReplicaInfo {
// Make sure initial values are returned correctly
assertEquals("Number of corrupt blocks must initially be 0", 0, crm.size());
assertNull("Param n cannot be less than 0", crm.getCorruptReplicaBlockIds(-1, null));
assertNull("Param n cannot be greater than 100", crm.getCorruptReplicaBlockIds(101, null));
long[] l = crm.getCorruptReplicaBlockIds(0, null);
assertNull("Param n cannot be less than 0", crm.getCorruptReplicaBlockIdsForTesting(-1, null));
assertNull("Param n cannot be greater than 100", crm.getCorruptReplicaBlockIdsForTesting(101, null));
long[] l = crm.getCorruptReplicaBlockIdsForTesting(0, null);
assertNotNull("n = 0 must return non-null", l);
assertEquals("n = 0 must return an empty list", 0, l.length);
@ -118,14 +118,14 @@ public class TestCorruptReplicaInfo {
assertTrue("First five block ids not returned correctly ",
Arrays.equals(new long[]{0,1,2,3,4},
crm.getCorruptReplicaBlockIds(5, null)));
crm.getCorruptReplicaBlockIdsForTesting(5, null)));
LOG.info(crm.getCorruptReplicaBlockIds(10, 7L));
LOG.info(crm.getCorruptReplicaBlockIdsForTesting(10, 7L));
LOG.info(block_ids.subList(7, 18));
assertTrue("10 blocks after 7 not returned correctly ",
Arrays.equals(new long[]{8,9,10,11,12,13,14,15,16,17},
crm.getCorruptReplicaBlockIds(10, 7L)));
crm.getCorruptReplicaBlockIdsForTesting(10, 7L)));
}