Incremental build in Jenkins

Question

I am using Jenkins 1.462 and maven version is 3.0.4. At Jenkins I enabled check-box \"Incremental build - only build changed modules\"

I want to figure out 2 questions:<

Answer 1

As stated by Maven documentation incremental builds are not very reliable at least until 3.0.4:

Currently (3.0.4) Apache Maven doesn't support incremental builds very well.

https://cwiki.apache.org/confluence/display/MAVEN/Incremental+Builds (first line)

Instead, I would strongly suggest using any of these two approaches for speeding up your build:

• Using parallel builds. In my experience in large projects this works great and can greatly reduce the build time with minimum (if any) risk. Just execute something like mvn -T 1.5C clean install https://cwiki.apache.org/confluence/display/MAVEN/Parallel+builds+in+Maven+3

• If your modules are independent you can rather move them to different projects and glue them together by using maven dependencies.