3

We have a machine running on linux where we are exposing & also consuming SOAP based web services that use Keep Alive settings. Now when we change the TCP keep alive time out value by setting "/proc/sys/net/ipv4/tcp_keepalive_time" in linux, will this affect both TCP clients and servers running in this linux box?

Additional Information : We use apache camel-cxf endpoints deployed in apache karaf(servicemix) to expose and consumer SOAP based webservices.

10

Linux kernel's built-in support for TCP keepalive affects all keepalive-enabled TCP sockets.

TCP keepalive is not enabled by default, though: the applications must explicitly request keepalive control for their sockets using the setsockopt interface.

You can check whether keepalive is enabled on a specific socket by using the netstat command with the -o, --timers option:

Here you can see that the same process can open different network sockets in both modes:

# netstat -anpo | grep 8999
tcp        0      0 10.10.171.44:48744         10.10.139.30:8999          ESTABLISHED 18232/java          keepalive (83.39/0/0)

# netstat -anpo | grep 8009
tcp        0      0 10.10.171.44:8009          10.10.171.42:40947         ESTABLISHED 18232/java          off (0.00/0/0)

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.