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https://issues.apache.org/jira/browse/STORM-254?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14066172#comment-14066172
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ASF GitHub Bot commented on STORM-254:
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Github user dashengju commented on the pull request:
https://github.com/apache/incubator-storm/pull/176#issuecomment-49409100
thanks for your review
> one Spout/Bolt can register metric twice with same name
> -------------------------------------------------------
>
> Key: STORM-254
> URL: https://issues.apache.org/jira/browse/STORM-254
> Project: Apache Storm (Incubating)
> Issue Type: Bug
> Affects Versions: 0.9.2-incubating
> Reporter: DashengJu
> Original Estimate: 12h
> Remaining Estimate: 12h
>
> In a Bolt's prepare method, we can register metrics twice with the same name,
> using different timeBucketSizeInSecs parameter, like this:
> public void prepare(Map stormConf, TopologyContext context) {
> mapper = new ObjectMapper();
>
> cMetric = new MTCountMetric();
> context.registerMetric("JavaBoltCount", cMetric, 120);
> ccMetric = new MTCountMetric();
> context.registerMetric("JavaBoltCount", ccMetric, 60);
> }
> ----------------------------------------------------------------------------------------
> This is caused by TopologyContext's registerMetric. In TopologyContext, all
> registered metrics holds in a map defined below:
> private Map<Integer,Map<Integer, Map<String, IMetric>>> _registeredMetrics;
> timeBucketSizeInSecs ----> __taskId ----> metricName ----> metirc
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