Our builds are failing because of the following error: 
FATAL: Channel "hudson.remoting.Channel@64a96f0e:": Remote call on failed. The channel is closing down or has closed down
java.nio.channels.ClosedChannelException
This has been happening for a couple of months.

Some of our scheduled tests run for a while, and fail after a while, while others fail immediately.

Version information:

Micro Focus Application Automation Tools 7.5
Jenkins 2.375
We installed the jenkins nodes with the winsw solution (Windows service)