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From "Alan Burlison (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-12261) Surefire needs to make sure the JVMs it fires up fit within the memory available
Date Tue, 28 Jul 2015 18:27:05 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-12261?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14644801#comment-14644801
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Alan Burlison commented on HADOOP-12261:
----------------------------------------

Using it on the Apache Jenkins infrastructure seem reasonable enough, making it a prerequisite
for people trying to run the tests on their own machines, not.

The biggest problem I have is the unpredictability of the tests - I get different results
on every run, even on Linux, which makes it impossible to know if any particular failure is
due to a change you've made or just part of the general random brokenness of the tests.

> Surefire needs to make sure the JVMs it fires up fit within the memory available
> --------------------------------------------------------------------------------
>
>                 Key: HADOOP-12261
>                 URL: https://issues.apache.org/jira/browse/HADOOP-12261
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: test
>    Affects Versions: 2.7.1
>            Reporter: Alan Burlison
>            Assignee: Alan Burlison
>
> hadoop-project/pom.xml sets maven-surefire-plugin.argLine to include -Xmx4096m. Allocating
 that amount of memory requires a 64-bit JVM, but on platforms with both 32 and 64-bit JVMs
surefire runs the 32 bit version by default and tests fail to start as a result. "-d64" should
be added to the command-line arguments to ensure a 64-bit JVM is always used.



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