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HDFS-15551. Tiny Improve for DeadNode detector (#2265)

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Contributed by imbajin.

Reviewed-by: leosunli <lisheng.sun08@gmail.com>
Signed-off-by: He Xiaoqiao <hexiaoqiao@apache.org>
This commit is contained in:
imbajin 2020-09-11 15:44:03 +08:00 committed by GitHub
parent 56ebabd426
commit 89428f142f
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 9 additions and 5 deletions
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3
hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/DFSInputStream.java
View File

@ -181,10 +181,13 @@ private boolean isPeriodicRefreshEnabled() {
private byte[] oneByteBuf; // used for 'int read()'
protected void addToLocalDeadNodes(DatanodeInfo dnInfo) {
DFSClient.LOG.debug("Add {} to local dead nodes, previously was {}.",
dnInfo, deadNodes);
deadNodes.put(dnInfo, dnInfo);
}
protected void removeFromLocalDeadNodes(DatanodeInfo dnInfo) {
DFSClient.LOG.debug("Remove {} from local dead nodes.", dnInfo);
deadNodes.remove(dnInfo);
}

11
hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/DeadNodeDetector.java
View File

@ -294,7 +294,7 @@ void startProbeScheduler() {
}
/**
* Prode datanode by probe byte.
* Prode datanode by probe type.
*/
private void scheduleProbe(ProbeType type) {
LOG.debug("Schedule probe datanode for probe type: {}.", type);
@ -376,11 +376,10 @@ public DatanodeLocalInfo call() throws Exception {
} catch (Exception e) {
LOG.error("Probe failed, datanode: {}, type: {}.", datanodeInfo, type,
e);
}
deadNodeDetector.probeCallBack(this, false);
}
}
}
/**
* Handle data node, according to probe result. When ProbeType is CHECK_DEAD,
@ -402,7 +401,7 @@ private void probeCallBack(Probe probe, boolean success) {
}
} else {
if (probe.getType() == ProbeType.CHECK_SUSPECT) {
LOG.info("Add the node to dead node list: {}.",
LOG.warn("Probe failed, add suspect node to dead node list: {}.",
probe.getDatanodeInfo());
addToDead(probe.getDatanodeInfo());
}
@ -415,11 +414,12 @@ private void probeCallBack(Probe probe, boolean success) {
private void checkDeadNodes() {
Set<DatanodeInfo> datanodeInfos = clearAndGetDetectedDeadNodes();
for (DatanodeInfo datanodeInfo : datanodeInfos) {
LOG.debug("Add dead node to check: {}.", datanodeInfo);
if (!deadNodesProbeQueue.offer(datanodeInfo)) {
LOG.debug("Skip to add dead node {} to check " +
"since the probe queue is full.", datanodeInfo);
break;
} else {
LOG.debug("Add dead node to check: {}.", datanodeInfo);
}
}
state = State.IDLE;
@ -475,6 +475,7 @@ public synchronized void addNodeToDetect(DFSInputStream dfsInputStream,
datanodeInfos.add(datanodeInfo);
}
LOG.debug("Add datanode {} to suspectAndDeadNodes.", datanodeInfo);
addSuspectNodeToDetect(datanodeInfo);
}