maven ignoring findbugs suppressFBWarnings annotation - maven

Question

I have 2 projects that I am using the FindBugs plugin in maven to identify bugs. I am also using the #SuppressFBWarnings annotation to ignore specific bugs.
With the first project, I added the dependancies to the pom.xml and both the findbugs report and the annotation worked fine. With the second project, the report gets generated, but it still identifies bugs that I have suppressed using the annotation.
I run mvn clean install site to generate the reports on my machine in the build folder.
Each of the 2 projects I mentioned, have sub-projects with their own pom.xml files in their sub-directories, so in the parent directory, I also have a pom.xml. This directory layout is mirrored identically in both of the main projects.
Here is the XML I added to the parent poms under the <reporting> tag:
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>findbugs-maven-plugin</artifactId>
<version>2.3.2</version>
<configuration>
<xmlOutput>true</xmlOutput>
<findbugsXmlOutput>true</findbugsXmlOutput>
<fork>true</fork>
<threshold>Low</threshold>
<effort>Min</effort>
</configuration>
</plugin>
Also, in this same parent pom, I added this to the <dependencyManagement><dependencies> section:
<dependency>
<groupId>com.google.code.findbugs</groupId>
<artifactId>annotations</artifactId>
<version>2.0.1</version>
</dependency>
This is identical in both of the main projects poms.
Now, in the sub-projects where I actually use the #SuppressFBWarnings annotation, and only in that particular sub-project, I have this under <dependencies>:
<dependency>
<groupId>com.google.code.findbugs</groupId>
<artifactId>annotations</artifactId>
<version>2.0.1</version>
</dependency>
Also, this is mirrored in the other working project. I copied and pasted directly.
One project works perfect and I can successfully suppress false positives. The other project completely ignores the #SuppressFBWarnings anotation, and I can't seem to fix it.
Is there something I'm missing here?
I think that if an annotation is not found, instead of giving an error, it will just ignore it? How can I tell if its not found?
Hopefully this is a simple fix.
Thanks.

Answer 1

#SuppressFBWarnings was introduced with the annotation in version 3. That's why it should look like this:
<dependency>
<groupId>com.google.code.findbugs</groupId>
<artifactId>annotations</artifactId>
<version>3.0.1</version>
</dependency>

Answer 2

Try to add annotations artifcat to the plugin dependencies :
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>findbugs-maven-plugin</artifactId>
<version>2.3.2</version>
<configuration>
<xmlOutput>true</xmlOutput>
<findbugsXmlOutput>true</findbugsXmlOutput>
<fork>true</fork>
<threshold>Low</threshold>
<effort>Min</effort>
</configuration>
<dependencies>
<dependency>
<groupId>com.google.code.findbugs</groupId>
<artifactId>annotations</artifactId>
<version>2.0.1</version>
</dependency>
</dependencies>
</plugin>

Answer 3

Ensure that the dependency added is in between the dependencies tags.
Like this:
<dependencies>
<dependency>
<groupId>something</groupId>
<artifactId>something</artifactId>
<version>something</version>
</dependency>
<dependencies>