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From "Jeremy Hanna (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-8629) Exceptions in cassandra-stress
Date Wed, 15 Apr 2015 16:55:00 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-8629?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14496504#comment-14496504
] 

Jeremy Hanna commented on CASSANDRA-8629:
-----------------------------------------

I can reliably repro the DynamicList problem on a cluster with this:

[code]
cassandra-stress user profile=./cqlstress-example.yaml ops\(insert=1,simple1=1\) duration=10m
-rate threads=100 -node 1.2.3.4 -mode native cql3 user=tbombadil password=goldberry4ever
[code]

Using no-warmup does workaround the problem.

> Exceptions in cassandra-stress
> ------------------------------
>
>                 Key: CASSANDRA-8629
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-8629
>             Project: Cassandra
>          Issue Type: Bug
>            Reporter: Aleksey Yeschenko
>            Assignee: Benedict
>            Priority: Trivial
>
> 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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