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https://issues.apache.org/jira/browse/HBASE-15319?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Elliott Clark updated HBASE-15319:
----------------------------------
Fix Version/s: 1.2.1
1.3.0
2.0.0
Affects Version/s: 1.3.0
2.0.0
1.2.0
Status: Patch Available (was: Open)
> 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, 1.2.0, 2.0.0, 1.3.0
> Reporter: Hao Lin
> Assignee: Elliott Clark
> Labels: easyfix
> Fix For: 2.0.0, 1.3.0, 1.2.1
>
> Attachments: HBASE-15319.patch
>
>
> 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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