Github user vrozov commented on the pull request:
https://github.com/apache/incubator-apex-core/pull/156#issuecomment-154637569
Number of violations are configured in modules pom.xml and project pom has
configuration for the checkstyle version to use:
```
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-checkstyle-plugin</artifactId>
<configuration>
<maxAllowedViolations>2072</maxAllowedViolations>
</configuration>
</plugin>
```
and
```
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-checkstyle-plugin</artifactId>
<version>2.17</version>
<dependencies>
<dependency>
<groupId>com.puppycrawl.tools</groupId>
<artifactId>checkstyle</artifactId>
<version>6.11.2</version>
</dependency>
</dependencies>
```
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