pgaref

java.net.NoRouteToHostException: Cannot assign requested address: JMeter server is unable to allocate a port to create a connection to the JMeter client to return the samples.

Same thing happened to Nginx front-end as well!

java.net.NoRouteToHostException: Cannot assign requested address
Otherwise, the following messages may appear in the JMeter JTL files:

Non HTTP response code: java.net.BindException
Non HTTP response message: Address already in use
The solution is to enable fast recycling TIME_WAIT sockets.