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Published 20 hours ago • verified publisher icon datastax

Unable to compute when histogram overflowed

Open haydenxia opened this issue 3 years ago • 0 comments

After I deployed the mcac monitor(for 4 nodes cassandra cluster),I find cassandra system.log output warning information as follow frequently： WARN [insights-6-1] 2022-02-15 10:48:29,236 UnixSocketClient.java:629 - Error reporting: java.lang.IllegalStateException: Unable to compute when histogram overflowed at org.apache.cassandra.metrics.DecayingEstimatedHistogramReservoir$EstimatedHistogramReservoirSnapshot.getMean(DecayingEstimatedHistogramReservoir.java:585) at com.datastax.mcac.UnixSocketClient.writeMetric(UnixSocketClient.java:835) at com.datastax.mcac.UnixSocketClient.access$500(UnixSocketClient.java:67) at com.datastax.mcac.UnixSocketClient$2.lambda$onHistogramAdded$2(UnixSocketClient.java:531) at com.datastax.mcac.UnixSocketClient.writeGroup(UnixSocketClient.java:618) at com.datastax.mcac.UnixSocketClient.lambda$restartMetricReporting$1(UnixSocketClient.java:597) at io.netty.util.concurrent.PromiseTask.runTask(PromiseTask.java:98) at io.netty.util.concurrent.ScheduledFutureTask.run(ScheduledFutureTask.java:176) at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:164) at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:472) at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:384) at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989) at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) at java.lang.Thread.run(Thread.java:748) Why? Thank you for your help in advance.

haydenxia avatar Feb 15 '22 02:02 haydenxia