Jul 14, 2014 6:54:53 PM WARNING org.jenkinsci.plugins.ghprb.GhprbPullRequest obtainAuthorEmail
Couldn't obtain author email.
java.lang.NullPointerException
    at org.kohsuke.github.GHPerson.populate(GHPerson.java:42)
    at org.kohsuke.github.GHPerson.getEmail(GHPerson.java:220)
    at org.jenkinsci.plugins.ghprb.GhprbPullRequest.obtainAuthorEmail(GhprbPullRequest.java:266)
    at org.jenkinsci.plugins.ghprb.GhprbPullRequest.tryBuild(GhprbPullRequest.java:161)
    at org.jenkinsci.plugins.ghprb.GhprbPullRequest.check(GhprbPullRequest.java:106)
    at org.jenkinsci.plugins.ghprb.GhprbRepository.onPullRequestHook(GhprbRepository.java:233)
    at org.jenkinsci.plugins.ghprb.GhprbRootAction.doIndex(GhprbRootAction.java:62)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:483)
    at org.kohsuke.stapler.Function$InstanceFunction.invoke(Function.java:298)
    at org.kohsuke.stapler.Function.bindAndInvoke(Function.java:161)
    at org.kohsuke.stapler.Function.bindAndInvokeAndServeResponse(Function.java:96)
    at org.kohsuke.stapler.MetaClass$2.dispatch(MetaClass.java:164)
    at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:728)
    at org.kohsuke.stapler.Stapler.invoke(Stapler.java:858)
    at org.kohsuke.stapler.MetaClass$12.dispatch(MetaClass.java:390)
    at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:728)
    at org.kohsuke.stapler.Stapler.invoke(Stapler.java:858)
    at org.kohsuke.stapler.Stapler.invoke(Stapler.java:631)
(...)