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HDFS-12033. DatanodeManager picking EC recovery tasks should also consider the number of regular replication tasks. Contributed by Lei (Eddy) Xu.

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This commit is contained in:
Lei Xu 2017-06-26 15:43:50 -07:00
parent a9d3412b4c
commit 144753e87f
2 changed files with 52 additions and 0 deletions
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1
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/DatanodeManager.java
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@ -1661,6 +1661,7 @@ public DatanodeCommand[] handleHeartbeat(DatanodeRegistration nodeReg,
if (pendingList != null) {
cmds.add(new BlockCommand(DatanodeProtocol.DNA_TRANSFER, blockPoolId,
pendingList));
maxTransfers -= pendingList.size();
}
// check pending erasure coding tasks
List<BlockECReconstructionInfo> pendingECList = nodeinfo

51
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/TestDatanodeManager.java
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@ -44,13 +44,21 @@
import org.apache.hadoop.hdfs.protocol.DatanodeInfo;
import org.apache.hadoop.hdfs.protocol.ExtendedBlock;
import org.apache.hadoop.hdfs.protocol.LocatedBlock;
import org.apache.hadoop.hdfs.server.blockmanagement.DatanodeDescriptor.BlockTargetPair;
import org.apache.hadoop.hdfs.server.namenode.FSNamesystem;
import org.apache.hadoop.hdfs.protocol.DatanodeInfoWithStorage;
import org.apache.hadoop.hdfs.protocol.HdfsConstants;
import org.apache.hadoop.hdfs.security.token.block.ExportedBlockKeys;
import org.apache.hadoop.hdfs.server.common.HdfsServerConstants;
import org.apache.hadoop.hdfs.server.common.StorageInfo;
import org.apache.hadoop.hdfs.server.protocol.BlockCommand;
import org.apache.hadoop.hdfs.server.protocol.BlockECReconstructionCommand;
import org.apache.hadoop.hdfs.server.protocol.BlockECReconstructionCommand.BlockECReconstructionInfo;
import org.apache.hadoop.hdfs.server.protocol.DatanodeCommand;
import org.apache.hadoop.hdfs.server.protocol.DatanodeRegistration;
import org.apache.hadoop.hdfs.server.protocol.SlowDiskReports;
import org.apache.hadoop.hdfs.server.protocol.SlowPeerReports;
import org.apache.hadoop.hdfs.server.protocol.StorageReport;
import org.apache.hadoop.net.DNSToSwitchMapping;
import org.apache.hadoop.util.Shell;
import org.junit.Assert;
@ -491,4 +499,47 @@ public void testRemoveIncludedNode() throws IOException {
Assert.assertEquals("Unexpected host or host in unexpected position",
"127.0.0.1:23456", bothAgain.get(1).getInfoAddr());
}
@Test
public void testPendingRecoveryTasks() throws IOException {
FSNamesystem fsn = Mockito.mock(FSNamesystem.class);
Mockito.when(fsn.hasWriteLock()).thenReturn(true);
Configuration conf = new Configuration();
DatanodeManager dm = Mockito.spy(mockDatanodeManager(fsn, conf));
int maxTransfers = 20;
int numPendingTasks = 7;
int numECTasks = maxTransfers - numPendingTasks;
DatanodeDescriptor nodeInfo = Mockito.mock(DatanodeDescriptor.class);
Mockito.when(nodeInfo.isRegistered()).thenReturn(true);
Mockito.when(nodeInfo.getStorageInfos())
.thenReturn(new DatanodeStorageInfo[0]);
List<BlockTargetPair> pendingList =
Collections.nCopies(numPendingTasks, new BlockTargetPair(null, null));
Mockito.when(nodeInfo.getReplicationCommand(maxTransfers))
.thenReturn(pendingList);
List<BlockECReconstructionInfo> ecPendingList =
Collections.nCopies(numECTasks, null);
Mockito.when(nodeInfo.getErasureCodeCommand(numECTasks))
.thenReturn(ecPendingList);
DatanodeRegistration dnReg = Mockito.mock(DatanodeRegistration.class);
Mockito.when(dm.getDatanode(dnReg)).thenReturn(nodeInfo);
DatanodeCommand[] cmds = dm.handleHeartbeat(
dnReg, new StorageReport[1], "bp-123", 0, 0, 10, maxTransfers, 0, null,
SlowPeerReports.EMPTY_REPORT, SlowDiskReports.EMPTY_REPORT);
assertEquals(2, cmds.length);
assertTrue(cmds[0] instanceof BlockCommand);
BlockCommand replicaCmd = (BlockCommand) cmds[0];
assertEquals(numPendingTasks, replicaCmd.getBlocks().length);
assertEquals(numPendingTasks, replicaCmd.getTargets().length);
assertTrue(cmds[1] instanceof BlockECReconstructionCommand);
BlockECReconstructionCommand ecRecoveryCmd =
(BlockECReconstructionCommand) cmds[1];
assertEquals(numECTasks, ecRecoveryCmd.getECTasks().size());
}
}