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HDFS-16327. Make dfs.namenode.max.slowpeer.collect.nodes reconfigurable #3716

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Merged
merged 1 commit into from
Dec 14, 2021
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HDFS-16327. Make dfs.namenode.max.slowpeer.collect.nodes reconfigurable #3716

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11 changes: 10 additions & 1 deletion ...oop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/DatanodeManager.java
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Original file line number Diff line number Diff line change
Expand Up @@ -214,7 +214,7 @@ public class DatanodeManager {
private static Set<String> slowNodesUuidSet = Sets.newConcurrentHashSet();
private Daemon slowPeerCollectorDaemon;
private final long slowPeerCollectionInterval;
private final int maxSlowPeerReportNodes;
private volatile int maxSlowPeerReportNodes;

@Nullable
private final SlowDiskTracker slowDiskTracker;
Expand Down Expand Up @@ -515,6 +515,15 @@ public boolean getEnableAvoidSlowDataNodesForRead() {
return this.avoidSlowDataNodesForRead;
}

public void setMaxSlowpeerCollectNodes(int maxNodes) {
this.maxSlowPeerReportNodes = maxNodes;
}

@VisibleForTesting
public int getMaxSlowpeerCollectNodes() {
return this.maxSlowPeerReportNodes;
}

/**
* Sort the non-striped located blocks by the distance to the target host.
*
Expand Down
24 changes: 18 additions & 6 deletions ...fs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/NameNode.java
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Expand Up @@ -191,6 +191,8 @@
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_AVOID_SLOW_DATANODE_FOR_READ_DEFAULT;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_BLOCKPLACEMENTPOLICY_EXCLUDE_SLOW_NODES_ENABLED_KEY;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_BLOCKPLACEMENTPOLICY_EXCLUDE_SLOW_NODES_ENABLED_DEFAULT;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_MAX_SLOWPEER_COLLECT_NODES_KEY;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_MAX_SLOWPEER_COLLECT_NODES_DEFAULT;

import static org.apache.hadoop.util.ExitUtil.terminate;
import static org.apache.hadoop.util.ToolRunner.confirmPrompt;
Expand Down Expand Up @@ -334,7 +336,8 @@ public enum OperationCategory {
DFS_BLOCK_PLACEMENT_EC_CLASSNAME_KEY,
DFS_IMAGE_PARALLEL_LOAD_KEY,
DFS_NAMENODE_AVOID_SLOW_DATANODE_FOR_READ_KEY,
DFS_NAMENODE_BLOCKPLACEMENTPOLICY_EXCLUDE_SLOW_NODES_ENABLED_KEY));
DFS_NAMENODE_BLOCKPLACEMENTPOLICY_EXCLUDE_SLOW_NODES_ENABLED_KEY,
DFS_NAMENODE_MAX_SLOWPEER_COLLECT_NODES_KEY));

private static final String USAGE = "Usage: hdfs namenode ["
+ StartupOption.BACKUP.getName() + "] | \n\t["
Expand Down Expand Up @@ -2204,7 +2207,8 @@ protected String reconfigurePropertyImpl(String property, String newVal)
} else if (property.equals(DFS_IMAGE_PARALLEL_LOAD_KEY)) {
return reconfigureParallelLoad(newVal);
} else if (property.equals(DFS_NAMENODE_AVOID_SLOW_DATANODE_FOR_READ_KEY)
|| (property.equals(DFS_NAMENODE_BLOCKPLACEMENTPOLICY_EXCLUDE_SLOW_NODES_ENABLED_KEY))) {
|| (property.equals(DFS_NAMENODE_BLOCKPLACEMENTPOLICY_EXCLUDE_SLOW_NODES_ENABLED_KEY))
|| (property.equals(DFS_NAMENODE_MAX_SLOWPEER_COLLECT_NODES_KEY))) {
return reconfigureSlowNodesParameters(datanodeManager, property, newVal);
} else {
throw new ReconfigurationException(property, newVal, getConf().get(
Expand Down Expand Up @@ -2396,24 +2400,32 @@ String reconfigureSlowNodesParameters(final DatanodeManager datanodeManager,
final String property, final String newVal) throws ReconfigurationException {
BlockManager bm = namesystem.getBlockManager();
namesystem.writeLock();
boolean enable;
String result;
try {
if (property.equals(DFS_NAMENODE_AVOID_SLOW_DATANODE_FOR_READ_KEY)) {
enable = (newVal == null ? DFS_NAMENODE_AVOID_SLOW_DATANODE_FOR_READ_DEFAULT :
boolean enable = (newVal == null ? DFS_NAMENODE_AVOID_SLOW_DATANODE_FOR_READ_DEFAULT :
Boolean.parseBoolean(newVal));
result = Boolean.toString(enable);
datanodeManager.setAvoidSlowDataNodesForReadEnabled(enable);
} else if (property.equals(
DFS_NAMENODE_BLOCKPLACEMENTPOLICY_EXCLUDE_SLOW_NODES_ENABLED_KEY)) {
enable = (newVal == null ?
boolean enable = (newVal == null ?
DFS_NAMENODE_BLOCKPLACEMENTPOLICY_EXCLUDE_SLOW_NODES_ENABLED_DEFAULT :
Boolean.parseBoolean(newVal));
result = Boolean.toString(enable);
bm.setExcludeSlowNodesEnabled(enable);
} else if (property.equals(DFS_NAMENODE_MAX_SLOWPEER_COLLECT_NODES_KEY)) {
int maxSlowpeerCollectNodes = (newVal == null ?
DFS_NAMENODE_MAX_SLOWPEER_COLLECT_NODES_DEFAULT :
Integer.parseInt(newVal));
result = Integer.toString(maxSlowpeerCollectNodes);
datanodeManager.setMaxSlowpeerCollectNodes(maxSlowpeerCollectNodes);
} else {
throw new IllegalArgumentException("Unexpected property " +
property + " in reconfigureSlowNodesParameters");
}
LOG.info("RECONFIGURE* changed {} to {}", property, newVal);
return Boolean.toString(enable);
return result;
} catch (IllegalArgumentException e) {
throw new ReconfigurationException(property, newVal, getConf().get(
property), e);
Expand Down
19 changes: 19 additions & 0 deletions ...op-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestNameNodeReconfigure.java
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Original file line number Diff line number Diff line change
Expand Up @@ -55,6 +55,7 @@
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_BLOCK_INVALIDATE_LIMIT_KEY;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_AVOID_SLOW_DATANODE_FOR_READ_KEY;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_BLOCKPLACEMENTPOLICY_EXCLUDE_SLOW_NODES_ENABLED_KEY;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_MAX_SLOWPEER_COLLECT_NODES_KEY;
import static org.apache.hadoop.fs.CommonConfigurationKeys.IPC_BACKOFF_ENABLE_DEFAULT;

public class TestNameNodeReconfigure {
Expand Down Expand Up @@ -430,6 +431,24 @@ public void testEnableSlowNodesParametersAfterReconfigured()
getExcludeSlowNodesEnabled(BlockType.STRIPED));
}

@Test
public void testReconfigureMaxSlowpeerCollectNodes()
throws ReconfigurationException {
final NameNode nameNode = cluster.getNameNode();
final DatanodeManager datanodeManager = nameNode.namesystem
.getBlockManager().getDatanodeManager();

// By default, DFS_NAMENODE_MAX_SLOWPEER_COLLECT_NODES_KEY is 5.
assertEquals(5, datanodeManager.getMaxSlowpeerCollectNodes());

// Reconfigure.
nameNode.reconfigureProperty(
DFS_NAMENODE_MAX_SLOWPEER_COLLECT_NODES_KEY, Integer.toString(10));

// Assert DFS_NAMENODE_MAX_SLOWPEER_COLLECT_NODES_KEY is 10.
assertEquals(10, datanodeManager.getMaxSlowpeerCollectNodes());
}

@After
public void shutDown() throws IOException {
if (cluster != null) {
Expand Down
4 changes: 3 additions & 1 deletion hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/tools/TestDFSAdmin.java
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Original file line number Diff line number Diff line change
Expand Up @@ -90,6 +90,7 @@
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_MAX_SLOWPEER_COLLECT_NODES_KEY;
import static org.apache.hadoop.hdfs.client.HdfsAdmin.TRASH_PERMISSION;
import static org.hamcrest.CoreMatchers.allOf;
import static org.hamcrest.CoreMatchers.anyOf;
Expand Down Expand Up @@ -432,14 +433,15 @@ public void testNameNodeGetReconfigurableProperties() throws IOException {
final List<String> outs = Lists.newArrayList();
final List<String> errs = Lists.newArrayList();
getReconfigurableProperties("namenode", address, outs, errs);
assertEquals(15, outs.size());
assertEquals(16, outs.size());
assertEquals(DFS_BLOCK_PLACEMENT_EC_CLASSNAME_KEY, outs.get(1));
assertEquals(DFS_BLOCK_REPLICATOR_CLASSNAME_KEY, outs.get(2));
assertEquals(DFS_HEARTBEAT_INTERVAL_KEY, outs.get(3));
assertEquals(DFS_IMAGE_PARALLEL_LOAD_KEY, outs.get(4));
assertEquals(DFS_NAMENODE_AVOID_SLOW_DATANODE_FOR_READ_KEY, outs.get(5));
assertEquals(DFS_NAMENODE_BLOCKPLACEMENTPOLICY_EXCLUDE_SLOW_NODES_ENABLED_KEY, outs.get(6));
assertEquals(DFS_NAMENODE_HEARTBEAT_RECHECK_INTERVAL_KEY, outs.get(7));
assertEquals(DFS_NAMENODE_MAX_SLOWPEER_COLLECT_NODES_KEY, outs.get(8));
assertEquals(errs.size(), 0);
}

Expand Down