When I tried to build the coherence common, I kept getting errors. After a carefully check, I found that the coherence common has added Amazon EC2 service. Then the dependencies files should not only the coherence.jar but also the sdk file of aws.
I added the aws-java-sdk-18.104.22.168.jar in the dependencies file, then ant can build it successfully.
Maybe someone should modify the "build instructions" page or add the aws sdk to the dependencie.