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[HADOOP-17758][HDFS][FOLLOWUP]NPE and excessive warnings after HADOOP-17728 #3098

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[HADOOP-17758][HDFS][FOLLOWUP]NPE and excessive warnings after HADOOP-17728 #3098

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8 changes: 1 addition & 7 deletions hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/FileSystem.java
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Original file line number Diff line number Diff line change
Expand Up @@ -4004,19 +4004,13 @@ public void cleanUp() {
* Background action to act on references being removed.
*/
private static class StatisticsDataReferenceCleaner implements Runnable {
/**
* Represents the timeout period expires for remove reference objects from
* the STATS_DATA_REF_QUEUE when the queue is empty.
*/
private static final int REF_QUEUE_POLL_TIMEOUT = 10000;

@Override
public void run() {
while (!Thread.interrupted()) {
try {
StatisticsDataReference ref =
(StatisticsDataReference)STATS_DATA_REF_QUEUE.
remove(REF_QUEUE_POLL_TIMEOUT);
(StatisticsDataReference)STATS_DATA_REF_QUEUE.remove();
ref.cleanUp();
} catch (InterruptedException ie) {
LOGGER.warn("Cleaner thread interrupted, will stop", ie);
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