CloudBees' Nexus instance http://repo.cloudbees.com has been upgraded from 1.9.1 to 1.9.2.4.
This should help with intermittent Error 500 issues that were being experienced by a small number of customers.
In addition to the version bump we have also internally moved from custom Tomcat hosting to the Sonatype preferred Nexus hosting model using Jetty.
While this should not be visible externally (or cause issues in your builds), any unexpected behaviour should be reported to our Support Team.
Failed builds should be retried.
