in addition check what ip the master is binding to(with nestat) On 20 July 2016 at 06:12, Andrew Ehrlich <and...@aehrlich.com> wrote:
> Troubleshooting steps: > > $ telnet localhost 7077 (on master, to confirm port is open) > $ telnet <master_ip> 7077 (on slave, to confirm port is blocked) > > If the port is available on the master from the master, but not on the > master from the slave, check firewall settings on the master: > https://help.ubuntu.com/lts/serverguide/firewall.html > > On Jul 19, 2016, at 6:25 PM, Neil Chang <iam...@gmail.com> wrote: > > Hi, > I have two virtual pcs on private cloud (ubuntu 14). I installed spark > 2.0 preview on both machines. I then tried to test it with standalone mode. > I have no problem start the master. However, when I start the worker > (slave) on another machine, it makes many attempts to connect to master and > failed at the end. > I can ssh from each machine to another without any problem. I can also > run a master and worker at the same machine without any problem. > > What did I miss? Any clue? > > here are the messages: > > WARN NativeCodeLoader: Unable to load native-hadoop library for your > platform ... using builtin-java classes where applicable > .............. > INFO Worker: Connecting to master ip:7077 ... > INFO Worker: Retrying connection to master (attempt #1) > .............. > INFO Worker: Retrying connection to master (attempt #7) > java.lang.IllegalArgumentException: requirement failed: TransportClient > has not yet been set. > at scala.Predef$.require(Predef.scala:224) > ....... > WARN NettyRocEnv: Ignored failure: java.io.IOException: Connecting to > ip:7077 timed out > WARN Worker: Failed to connect to master ip.7077 > > > > Thanks, > Neil > > >
