Gremlin remote command fails with timeout error: H

I connected to a remote gremlin server via gremlin groovy shell. Connection succeeded. But for any remote command I try to execute it gives timeout error. Even for command :> 1+1

gremlin> :remote connect tinkerpop.server conf/senthil.yaml
==>Connected - 10.40.40.65/10.40.40.65:50080

gremlin> :> 1+1
Host did not respond in a timely fashion - check the server status and submit again.
Display stack trace? [yN]
org.apache.tinkerpop.gremlin.groovy.plugin.RemoteException: Host did not respond in a timely fashion - check the server status and submit again.
at org.apache.tinkerpop.gremlin.console.groovy.plugin.DriverRemoteAcceptor.submit(DriverRemoteAcceptor.java:120)
at org.codehaus.groovy.vmplugin.v7.IndyInterface.selectMethod(IndyInterface.java:215)
at org.apache.tinkerpop.gremlin.console.commands.SubmitCommand.execute(SubmitCommand.groovy:41)
at org.codehaus.groovy.vmplugin.v7.IndyInterface.selectMethod(IndyInterface.java:215)
at org.codehaus.groovy.tools.shell.Shell.execute(Shell.groovy:101)
at org.codehaus.groovy.tools.shell.Groovysh.super$2$execute(Groovysh.groovy)
at sun.reflect.GeneratedMethodAccessor14.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)

This is my conf file: remote.yaml

hosts: [10.40.40.65]
port: 50080
serializer: { className: org.apache.tinkerpop.gremlin.driver.ser.GryoMessageSerializerV1d0, config: { serializeResultToString: true }}

I'm using dynamodb + titan.

You might not have a truly successful connection. The console (and underlying driver) is optimistic in that it really doesn't fail a connection until a request is sent as it expects the server may come online "later". I would go back to investigating if the server is running, if you have the right IP, if the host property is not set to something like "localhost" if you are connecting remotely, if the port is open, that you are using a compatible version of TinkerPop, etc.