I faced a similar problem recently.
About this issue, my doubt is that if there is no nexus repository operation, and the build is done sequentially, first core (installing locally), after that the wildfly entire build, how this timeout is occurring?
Seems that this could be a common problem if the maven is executing in parallel and those intermittent problems can occur due synchronization issues.
To resolve my problem I first resolve the dependencies recently installed on local repository through: mvn dependency:build-classpath
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eduardo