Aleksey Yeschenko created CASSANDRA-8629:
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Summary: 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)
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