Treat NoRouteToHostException as a failed fetch #35
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It's possible to get NoRouteToHostExceptions as well as ConnectExceptions when attempting to connect to the kafka broker. I don't think any others are possible, at least based on the docs at http://docs.oracle.com/javase/6/docs/api/java/net/SocketException.html (BindException and PortUnreachableException shouldn't be possible for TCP connects).