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From "David (JIRA)" <>
Subject [jira] [Created] (CASSANDRA-14867) Histogram overflows potentially leading to writes failing
Date Tue, 06 Nov 2018 16:47:00 GMT
David created CASSANDRA-14867:

             Summary: Histogram overflows potentially leading to writes failing
                 Key: CASSANDRA-14867
             Project: Cassandra
          Issue Type: Bug
          Components: Streaming and Messaging
         Environment: cassandra 3.11.1 on ubuntu 16.04
            Reporter: David

I observed the following in cassandra logs on 1 host of a 6-node cluster:

ERROR [ScheduledTasks:1] 2018-11-01 17:26:41,277 - Exception in thread
java.lang.IllegalStateException: Unable to compute when histogram overflowed
 at org.apache.cassandra.metrics.DecayingEstimatedHistogramReservoir$EstimatedHistogramReservoirSnapshot.getMean(
 at$200( ~[apache-cassandra-3.11.1.jar:3.11.1]
 at$ ~[apache-cassandra-3.11.1.jar:3.11.1]
 at org.apache.cassandra.concurrent.DebuggableScheduledThreadPoolExecutor$
 at java.util.concurrent.Executors$ [na:1.8.0_172]
 at java.util.concurrent.FutureTask.runAndReset( [na:1.8.0_172]
 at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(
 at java.util.concurrent.ScheduledThreadPoolExecutor$
 at java.util.concurrent.ThreadPoolExecutor.runWorker( [na:1.8.0_172]
 at java.util.concurrent.ThreadPoolExecutor$ [na:1.8.0_172]
 at org.apache.cassandra.concurrent.NamedThreadFactory.lambda$threadLocalDeallocator$0(
 at ~[na:1.8.0_172]


At the same time, this node was failing all writes issued to it. Restarting cassandra on the
node brought the cluster into a good state and we stopped seeing the histogram overflow errors.

Has this issue been observed before? Could the histogram overflows cause writes to fail?

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