Hao Lin created HBASE-15319:
-------------------------------
Summary: clearJmxCache does not take effect actually
Key: HBASE-15319
URL: https://issues.apache.org/jira/browse/HBASE-15319
Project: HBase
Issue Type: Bug
Components: metrics
Affects Versions: 1.1.0.1
Reporter: Hao Lin
When trying to backport HBASE-14166 to 0.98.6, I find
JmxCacheBuster::clearJmxCache() does no take effect actually. The related code
are listed below:
{code:title=org.apache.hadoop.metrics2.impl.JmxCacheBuster.java|borderStyle=solid}
// fut is initialized to null
private static AtomicReference<ScheduledFuture> fut = new
AtomicReference<>(null);
public static void clearJmxCache() {
// clearJmxCache return directly when fut is null, which is always true.
// the actual intent is 'if (future != null && !future.isDone ...)' ?
ScheduledFuture future = fut.get();
if ((future == null || (!future.isDone() &&
future.getDelay(TimeUnit.MILLISECONDS) > 100))) {
return;
}
......
}
{code}
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