Zuul timing out in long-ish requests

I have experienced the same problem: in long requests, Zuul's hystrix command kept timing out after around a second in spite of setting ribbon.ReadTimeout=10000.

I solved it by disabling timeouts completely:

hystrix:
  command:
    default:
      execution:
        timeout:
          enabled: false

An alternative that also works is change Zuul's Hystrix isolation strategy to THREAD:

hystrix:
  command:
    default:
      execution:
        isolation:
          strategy: THREAD
          thread:
            timeoutInMilliseconds: 10000

This worked for me, I had to set connection and socket timeout in the application.yml:

zuul:
  host:
    connect-timeout-millis: 60000 # starting the connection 
    socket-timeout-millis: 60000  # monitor the continuous incoming data flow

The properties to set are: ribbon.ReadTimeout in general and <service>.ribbon.ReadTimeout for a specific service, in milliseconds. The Ribbon wiki has some examples. This javadoc has the property names.

In my case I had to change the following property:

zuul.host.socket-timeout-millis=30000