ZanderXu created HDFS-16787:
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Summary: Remove redundant lock in DataSetLockManager#removeLock in
datanode.
Key: HDFS-16787
URL: https://issues.apache.org/jira/browse/HDFS-16787
Project: Hadoop HDFS
Issue Type: Improvement
Reporter: ZanderXu
Assignee: ZanderXu
During patching the datanode fine-grained locking, found there is a redundant
lock in DataSetLockManager#removeLock, and the code as bellow:
{code:java}
@Override
public void removeLock(LockLevel level, String... resources) {
String lockName = generateLockName(level, resources);
try (AutoCloseDataSetLock lock = writeLock(level, resources)) {
// Here, this lock is redundant.
lock.lock();
lockMap.removeLock(lockName);
}
} {code}
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