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From "Mark Manley (JIRA)" <>
Subject [jira] [Commented] (CASSANDRA-9973) java.lang.IllegalStateException: Unable to compute when histogram overflowed
Date Sun, 23 Aug 2015 17:31:46 GMT


Mark Manley commented on CASSANDRA-9973:

Do we have an ETA for the release date of 2.2.1?  My ring was again crippled this morning
when several of my nodes spewed out hundreds of these errors a minute.  It corresponds to
the time that they stopped answering requests reliably.  If there is a workaround for 2.2.0,
I am all ears.


> java.lang.IllegalStateException: Unable to compute when histogram overflowed
> ----------------------------------------------------------------------------
>                 Key: CASSANDRA-9973
>                 URL:
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>            Reporter: Mark Manley
>            Assignee: T Jake Luciani
>             Fix For: 2.2.1
>         Attachments: 9973.txt
> I recently, and probably mistakenly, upgraded one of my production C* clusters to 2.2.0.
 I am seeing these errors in the logs, followed by an intense period of garbage collection
until the node, then the ring, becomes crippled:
> {code}
> ERROR [OptionalTasks:1] 2015-08-04 03:24:56,057 - Exception
in thread Thread[OptionalTasks:1,5,main]
> java.lang.IllegalStateException: Unable to compute when histogram overflowed
>         at org.apache.cassandra.utils.EstimatedHistogram.percentile(
>         at org.apache.cassandra.metrics.EstimatedHistogramReservoir$HistogramSnapshot.getValue(
>         at org.apache.cassandra.db.ColumnFamilyStore$
>         at org.apache.cassandra.concurrent.DebuggableScheduledThreadPoolExecutor$
>         at java.util.concurrent.Executors$ [na:1.8.0_45]
>         at java.util.concurrent.FutureTask.runAndReset( [na:1.8.0_45]
>         at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(
>         at java.util.concurrent.ScheduledThreadPoolExecutor$
>         at java.util.concurrent.ThreadPoolExecutor.runWorker(
>         at java.util.concurrent.ThreadPoolExecutor$
>         at [na:1.8.0_45]
> {code}
> I am not sure if the GC instability is this or something else, but I though this histogram
overflow issue was fixed in 2.1.3?  Anyway, reporting now as a possible regression.  Please
let me know what I can provide in terms of information to help with this.  Thanks!

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