From my point of view it is a good behaviour, but wrong is the final step (302 = file started to be downloaded). It may appear it is OK on the first sight, but 302 might be caused by an Apache server before the request reaches JBoss Downloader and Eclipse may consider it to be a response from JBoss Downloader with the dowloaded file .

Error while validating credentials in Download Runtime dialog ------------------------------------------------------------- Key: JBIDE-17453 URL: https://issues.jboss.org/browse/JBIDE-17453 Project: Tools (JBoss Tools) Issue Type: Bug Components: runtime-detection Affects Versions: 4.2.0.Beta2 Reporter: Radoslav Rábara Assignee: Rob Stryker Priority: Blocker Labels: respin-b Fix For: 4.2.0.Beta2 Attachments: credentials validation error.jpg After validation of valid credentials, the following error message appears {code} "An error occured while validating your credentials. org.eclipse.core.runtime.CoreException - Unknown response code: 200" {code} I was able to reproduce this issue only with one of mine jboss.org accounts.