[
https://issues.apache.org/jira/browse/GEODE-8520?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17201057#comment-17201057
]
ASF GitHub Bot commented on GEODE-8520:
---------------------------------------
jchen21 commented on a change in pull request #5536:
URL: https://github.com/apache/geode/pull/5536#discussion_r493856692
##########
File path:
geode-core/src/main/java/org/apache/geode/management/internal/beans/stats/GCStatsMonitor.java
##########
@@ -39,69 +39,71 @@
* @see org.apache.geode.management.internal.beans.stats.MBeanStatsMonitor
*/
public class GCStatsMonitor extends MBeanStatsMonitor {
+ // this class uses these volatile variables to make sure reads are reading
the latest values
+ // it is not using the parent's siteMap which is not volatile to keep the
stats values.
private volatile long collections = 0;
private volatile long collectionTime = 0;
- long getCollections() {
- return collections;
- }
-
- long getCollectionTime() {
- return collectionTime;
- }
-
public GCStatsMonitor(String name) {
super(name);
}
- void decreasePrevValues(Map<String, Number> statsMap) {
- collections -= statsMap.getOrDefault(StatsKey.VM_GC_STATS_COLLECTIONS,
0).longValue();
- collectionTime -=
statsMap.getOrDefault(StatsKey.VM_GC_STATS_COLLECTION_TIME, 0).longValue();
- }
-
- void increaseStats(String name, Number value) {
- if (name.equals(StatsKey.VM_GC_STATS_COLLECTIONS)) {
- collections += value.longValue();
- return;
- }
-
- if (name.equals(StatsKey.VM_GC_STATS_COLLECTION_TIME)) {
- collectionTime += value.longValue();
- return;
+ @Override
+ // this will be called multiple times with different collector's stats
+ public void addStatisticsToMonitor(Statistics stats) {
Review comment:
The `addStatisticsToMonitor` method ignores the descriptors other than
`VM_GC_STATS_COLLECTIONS` and `VM_GC_STATS_COLLECTION_TIME`. Can we guarantee
that there is no other descriptor?
----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
For queries about this service, please contact Infrastructure at:
us...@infra.apache.org
> GarbageCollectionCount metric is showing negative values
> --------------------------------------------------------
>
> Key: GEODE-8520
> URL: https://issues.apache.org/jira/browse/GEODE-8520
> Project: Geode
> Issue Type: Bug
> Components: management
> Affects Versions: 1.13.0
> Reporter: Jinmei Liao
> Priority: Major
> Labels: GeodeOperationAPI, pull-request-available
>
> sometimes the memberMBean's garbageCollectionCount and garbageCollectionTime
> metriics are showing negative values.
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
