VDSM consumes a lot of cpu and memory.
Engine loses vdsm responses.
In engine.log, the following error message would appear:
[org.ovirt.vdsm.jsonrpc.client.internal.ResponseWorker] (ResponseWorker) Exception thrown during message processing
If debug is enabled, it will have additional info:
"Heartbeat exeeded. Closing channel"
Red Hat Enterprise Virtualization (RHEV) 3.5
Subscriber exclusive content
A Red Hat subscription provides unlimited access to our knowledgebase of over 48,000 articles and solutions.