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https://issues.apache.org/jira/browse/STORM-3792?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Richard Zowalla closed STORM-3792.
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> Change pom.xml to use more test JVM threads without reuse
> ---------------------------------------------------------
>
> Key: STORM-3792
> URL: https://issues.apache.org/jira/browse/STORM-3792
> Project: Apache Storm
> Issue Type: Improvement
> Components: blobstore, examples, integration-test, storm-hdfs,
> storm-hive, storm-kafka, storm-kafka-client, storm-kafka-monitor,
> storm-server, storm-sql
> Reporter: Bipin Prasad
> Assignee: Bipin Prasad
> Priority: Major
> Fix For: 2.6.0
>
> Time Spent: 40m
> Remaining Estimate: 0h
>
> Maven surefire plugin configuration has two important flags:
> (1) reuseForks - setting of true mean reuse created JVMs.
> (2) forkCount - number of JVMs to create for testing. Pure number is an
> absolute count, whereas 1.0C means same as the number of CPUs.
> Reusing forked JVMs can cause somewhat indeterminate failures in test when
> global class instances are not properly initialized or cleaned. An example of
> such a singleton class Time.
> Not reusing will cause a slowdown in tests.
> To mitigate this slowdown, wherever the "forkCount=1", change it to
> "forkCount=1.0C" and add reuseForks=false if not already present. However,
> some modules (example storm-hdfs) forkCount cannot be increased from 1 to
> 1.0C, due to either resources limits or global locking (as in hdfs tests).
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