anuengineer commented on a change in pull request #2668:
URL: https://github.com/apache/hadoop/pull/2668#discussion_r576928327
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File path:
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystemLock.java
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@@ -182,6 +192,7 @@ public void readUnlock(String opName,
final long readLockIntervalMs =
TimeUnit.NANOSECONDS.toMillis(readLockIntervalNanos);
if (needReport && readLockIntervalMs >= this.readLockReportingThresholdMs)
{
+ numReadLockLongHold.addAndGet(1);
Review comment:
nit: you could use incrementAndGet. Don't have to fix it for me to
commit it, just flagging for your consideration.
https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/atomic/AtomicLong.html#incrementAndGet--
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