ZhangHB created HDFS-16898:
------------------------------
Summary: Make write lock fine-grain in processCommandFromActor
method
Key: HDFS-16898
URL: https://issues.apache.org/jira/browse/HDFS-16898
Project: Hadoop HDFS
Issue Type: Improvement
Affects Versions: 3.3.4
Reporter: ZhangHB
Now in method processCommandFromActor, we have code like below:
{code:java}
writeLock();
try {
if (actor == bpServiceToActive) {
return processCommandFromActive(cmd, actor);
} else {
return processCommandFromStandby(cmd, actor);
}
} finally {
writeUnlock();
} {code}
if method processCommandFromActive costs much time, the write lock would not
release.
It maybe block the updateActorStatesFromHeartbeat method in
offerService，furthermore, it can cause the lastcontact of datanode very high,
even dead when lastcontact beyond 600s.
{code:java}
bpos.updateActorStatesFromHeartbeat(
this, resp.getNameNodeHaState());{code}
here we can make write lock fine-grain in processCommandFromActor method to
address this problem
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