Have you ever encountered an “Unknown exception” error message when trying to deploy/validate a Deployment Set ? Something like the following ?
It doesn’t really provide you with a lot of information, so no idea what to do right ?Before contacting Salesforce Support, maybe it worths giving a try to the following:
Go to the Developer Console and Clear the Heap Dumps !
Hope it helps…
P.S. The explanation behind this, is that the Heap Dumps are also generated during deployment and this requires too much memory 😉