This is probably https://issues.jenkins-ci.org/browse/JENKINS-12994 - vote for that ticket if it is a problem for you (and/or add a note to the ticket indicating that you are also experiencing it)
From: jenkinsci-users@googlegroups.com [mailto:jenkinsci-users@googlegroups.com] On Behalf Of Nicky Ramone Sent: 07 March 2012 13:34 To: jenkinsci-users@googlegroups.com Subject: Cannot build any jobs: "Pending - Waiting for next available executor" Hi Since several days I'm unable to build anything and I can't understand what's wrong. Jenkins keeps waiting for an available executor but never starts: The server has enough free space and memory. I tried restarting Jenkins, upgrading to the latest version (now I'm on 1.454), restarting the job, but still nothing. I also looked at the catalina.out logs but found nothing related to that. Maybe someone can give me a hint, please? Thanks in advance. -- This e-mail and any attachments may contain confidential, copyright and or privileged material, and are for the use of the intended addressee only. If you are not the intended addressee or an authorised recipient of the addressee please notify us of receipt by returning the e-mail and do not use, copy, retain, distribute or disclose the information in or attached to the e-mail. Any opinions expressed within this e-mail are those of the individual and not necessarily of Diamond Light Source Ltd. Diamond Light Source Ltd. cannot guarantee that this e-mail or any attachments are free from viruses and we cannot accept liability for any damage which you may sustain as a result of software viruses which may be transmitted in or with the message. Diamond Light Source Limited (company no. 4375679). Registered in England and Wales with its registered office at Diamond House, Harwell Science and Innovation Campus, Didcot, Oxfordshire, OX11 0DE, United Kingdom