From: Neil Horman > Sent: 21 September 2016 16:43 > On Wed, Sep 21, 2016 at 09:44:30PM +0800, Sun Paul wrote: > > Hi > > > > we have an SCTP application running in JAVA. and we found that there > > is a problem when we as a client trying to connect to a remote IP > > address. > > > > If the remote IP address is not accessible, our application will keep > > retrying to connect using a self-defined local port address, says > > 51001, > > > > We found that after sometimes, says 2 hrs, this port 51001 is never > > able to bind to us again. even we tried to restart the application. > > > Sounds like you have another application that inadvertently bound to that port. > Its not a privlidged port, nor is it well known, so it seems plausible that > another application would eventually bind to it. Thats not a bug, just the way > ip works. > > run netstat -anp | grep 51001 > > And see what application is holding the port. Not much chance of a distro having a netstat that gives sctp info. You might find something in /proc/net/sctp. 3.18 contains a fix for a problem with shutdown() being called after the remote sends an INIT to restart an active connection when there is unacked data. If that happens the socket isn't released ever. A workaround is to use SO_LINGER to get the connection aborted. David -- To unsubscribe from this list: send the line "unsubscribe linux-sctp" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
