When querien the hudson xml api for executioner status on http://hudson.host.com/hudson/computer/<slave_host>/executors/1/api/xml we get the following:
<executor>
<currentExecutable>
<number>10</number>
<url>http://hudson.host.com/hudson/job/<job-name>/promotion//<promo-name>/<#promo-no>/</url>
</currentExecutable>
<idle>false</idle>
<likelyStuck>false</likelyStuck>
<number>1</number>
<progress>99</progress>
</executor>
Notice the:
-double slash
-missing build #
-missing promotionBuilds
The correct url i believe should be:
http://hudson.host.com/hudson/job/<job-name>/<#build-number>/promotion/<promo-name>/promotionBuilds/<#promo-no>/