Hi,
I’m using Maven 3.2.3, Spring 3.2.11.RELEASE, JUnit 4.11, Java 6, and the
Surefire/Failsafe 2.17 plugins. I’m trying to figure out why when running a
couple of modules in parallel, it takes much longer than when I run them
individually. I’m trying to figure out ways to speed up my build. I have
this in my parent pom …
<modules>
<module>core</module>
…
<module>module-x</module>
<module>module-y</module>
</modules>
When I run “mvn clean install -T 4”, modules “module-x” and “module-y” run
in parallel. Both have a number of integration tests, all using
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration({ "classpath:test-context.xml" })
public class MyServiceIT
{
Below are my surefire/failsafe configurations …
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.17</version>
<configuration>
<reuseForks>true</reuseForks>
<argLine>-Xmx2048m
-XX:MaxPermSize=512M </argLine>
<skipTests>${skipAllTests}</skipTests>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-failsafe-plugin</artifactId>
<version>2.17</version>
<configuration>
<reuseForks>true</reuseForks>
<argLine>-Xmx4096m
-XX:MaxPermSize=512M </argLine>
<skipTests>${skipAllTests}</skipTests>
</configuration>
<executions>
<execution>
<goals>
<goal>integration-test</goal>
<goal>verify</goal>
</goals>
</execution>
</executions>
</plugin>
When I run the tests in parallel, the modules take 11 minutes and 13
minutes, respectively, to run. However, running them concurrently (without
the “-T” option), they execute in 6 minutes and 9 minutes, respectively.
I’m confused about why they take so much longer to run when they both run at
the same time and was hoping some folks could suggest some ways I can
troubleshoot this further.
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