Hi. The way to diagnose this explicitly is: > 1) on the server machine that should be accepting connections on the port, > telnet localhost PORT, and telnet IP PORT you should get a connection, if > not then the server is not binding the port. > 2) on the remote machine verify that you can communicate to the server > machine via normal tools such as ssh and or ping and or traceroute, using > the IP address from the error message in your log file > 3) on the remote machine run telnet IP PORT. if (1) and (2) succeeded and > (3) does not, then there is something blocking packets for the port range > in > question. If (3) does succeed then there is some probably interesting > problem. >
Tried in step 3 to telnet both the 50010 and the 8010 ports of the problematic datanode - both worked. I agree there is indeed an interesting problem :). Question is how it can be solved. Thanks.
