Github user revans2 commented on the pull request: https://github.com/apache/storm/pull/1147#issuecomment-190417149 I started testing this and started to run into some issues. I created a new test, but the test is crap, because it takes way too long to run, but does give some good results. https://github.com/apache/storm/compare/master...revans2:stats-test?expand=1 I plan to expand this more, but for now I am running into the following exception. ``` java.lang.ClassCastException: java.lang.Long cannot be cast to java.util.Map at org.apache.storm.stats.StatsUtil.filterSysStreams(StatsUtil.java:1343) at org.apache.storm.stats.StatsUtil.aggPreMergeTopoPageSpout(StatsUtil.java:314) at org.apache.storm.stats.StatsUtil.aggTopoExecStats(StatsUtil.java:481) at org.apache.storm.stats.StatsUtil.aggregateTopoStats(StatsUtil.java:570) at org.apache.storm.stats.StatsUtil.aggTopoExecsStats(StatsUtil.java:550) at org.apache.storm.daemon.nimbus$fn__5066$exec_fn__884__auto__$reify__5095.getTopologyPageInfo(nimbus.clj:2117) at sun.reflect.GeneratedMethodAccessor104.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:483) at clojure.lang.Reflector.invokeMatchingMethod(Reflector.java:93) at clojure.lang.Reflector.invokeInstanceMethod(Reflector.java:28) at org.apache.storm.LocalCluster$_getTopologyPageInfo.invoke(LocalCluster.clj:110) at org.apache.storm.LocalCluster.getTopologyPageInfo(Unknown Source) at org.apache.storm.TestStats.testBasic(TestStats.java:150) ```
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