Citrix XenServer XS62E015 update failing to apply

If you’re using XenServer 6.2, you may have some problems installing the XS62E015 update from CTX140808.

You go through the normal update procedure – download XS62E015.zip from the CTX140808 Citrix knowledge base article, extract it and upload the XS62E015.xsupdate file to the pool, then apply UUID c8b9d332-30e4-4e5e-9a2a-8aaae6dee91a to the pool, which promptly fails with:

The uploaded patch file is invalid. See attached log for more details.
log: error parsing patch precheck xml: expected one of these character sequence: “required”, found “error” line 4

It turns out that Citrix issued two updates for the same issue – one for Citrix XenServer 6.2 without SP1 installed and one for Citrix XenServer with SP1 installed. The slight snag is that both of these updates show up in the list of available updates in Citrix XenCentre and the knowledge base articles don’t mention that the two updates patch the same problem, but in two different version of Citrix XenServer.

If you are running Citrix XenServer 6.2 with SP1 installed, then you need to install the XS62ESP1003 update from CTX140416 (UUID c208dc56-36c2-4e91-b8d7-0246575b1828). Once XS62ESP1003 has been installed, XS62E015 will also show up in the list of installed updates.