This question is a result of an answer to this question from yesterday
run a java application and a web application in a single maven build within a reactor project<
Having tried various options, I've found that the process-exec-maven-plugin to be best. I realize that the OP is asking about maven-antrun-plugin specifically but that is because of an answer received to a generic question.
https://github.com/bazaarvoice/maven-process-plugin
An example of using it to start a nodeJs server which is used as part of integration tests:
com.bazaarvoice.maven.plugins
process-exec-maven-plugin
${process-exec-maven-plugin.version}
node-server
pre-integration-test
start
node-server
../../test-server-dir
false
http://localhost:3000/
node
./app.js
stop-all
post-integration-test
stop-all