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https://issues.apache.org/jira/browse/CASSANDRA-8629?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17072307#comment-17072307
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miranda zhang commented on CASSANDRA-8629:
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Still hitting this exception, even with no-warmup, like
{code:java}
cassandra-stress user no-warmup ops(insert=10) profile=stressSpec.yaml
cl=QUORUM duration=30m -mode native cql3 maxPending=32768 connectionsPerHost=10
-rate threads=1500 -node file=node_list.txt{code}
only see this when "threads" is set to a large number.
> Exceptions in cassandra-stress
> ------------------------------
>
> Key: CASSANDRA-8629
> URL: https://issues.apache.org/jira/browse/CASSANDRA-8629
> Project: Cassandra
> Issue Type: Bug
> Components: Tool/stress
> Reporter: Aleksey Yeschenko
> Priority: Low
> Labels: stress
>
> cassandra-stress when run with tiny n, throws
> org.apache.commons.math3.exception.NotStrictlyPositiveException.
> Now, n=1 doesn't really make any sense, w/ 50k writes used just for warmup,
> but an exception is still an exception. Labeled w/ priority: Trivial.
> Profile used: http://pastebin.com/raw.php?i=9U5EMdVq
> {noformat}
> tools/bin/cassandra-stress user profile=partition.yaml ops\(insert=1\) n=1
> -rate threads=50
> INFO 18:21:59 Using data-center name 'datacenter1' for
> DCAwareRoundRobinPolicy (if this is incorrect, please provide the correct
> datacenter name with DCAwareRoundRobinPolicy constructor)
> Connected to cluster: Test Cluster
> Datatacenter: datacenter1; Host: localhost/127.0.0.1; Rack: rack1
> INFO 18:21:59 New Cassandra host localhost/127.0.0.1:9042 added
> Created schema. Sleeping 1s for propagation.
> Exception in thread "main"
> org.apache.commons.math3.exception.NotStrictlyPositiveException: standard
> deviation (0)
> at
> org.apache.commons.math3.distribution.NormalDistribution.<init>(NormalDistribution.java:108)
> at
> org.apache.cassandra.stress.settings.OptionDistribution$GaussianFactory.get(OptionDistribution.java:418)
> at
> org.apache.cassandra.stress.generate.SeedManager.<init>(SeedManager.java:59)
> at
> org.apache.cassandra.stress.settings.SettingsCommandUser.getFactory(SettingsCommandUser.java:78)
> at org.apache.cassandra.stress.StressAction.run(StressAction.java:61)
> at org.apache.cassandra.stress.Stress.main(Stress.java:109)
> {noformat}
> On cassandra-2.1 HEAD, I cannot reproduce it, but get a different exception,
> with n=10:
> {noformat}
> Exception in thread "Thread-13" java.lang.AssertionError
> at
> org.apache.cassandra.stress.util.DynamicList.remove(DynamicList.java:156)
> at org.apache.cassandra.stress.generate.Seed.remove(Seed.java:83)
> at
> org.apache.cassandra.stress.generate.SeedManager.markLastWrite(SeedManager.java:115)
> at
> org.apache.cassandra.stress.generate.PartitionIterator$MultiRowIterator.setHasNext(PartitionIterator.java:561)
> at
> org.apache.cassandra.stress.generate.PartitionIterator$MultiRowIterator.seek(PartitionIterator.java:333)
> at
> org.apache.cassandra.stress.generate.PartitionIterator$MultiRowIterator.reset(PartitionIterator.java:242)
> at
> org.apache.cassandra.stress.generate.PartitionIterator.reset(PartitionIterator.java:99)
> at org.apache.cassandra.stress.Operation.ready(Operation.java:110)
> at
> org.apache.cassandra.stress.StressAction$Consumer.run(StressAction.java:288)
> {noformat}
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