Hi,

Currently we're developing software on QNX for automotive.
I'm using sockets to communicate with another linux machine.
These two machines are installed into one unit and wired through an USB-ethernet interface.

Now I have an issue that send() is taking too long (about over 30 seconds) to return.
I found out that becoming full of TCP buffer is one of the cause, but they aren't sending so much data, i think.
Therefore, i'd like to know if there're other reasons causing this issue.

I guess that closing the tx socket from another thread at the same time with send() caused my issue,
but can't explain it clearly.

Please tell me your ideas.

Thanks a lot for your support.

Best Regards,
D.X.Quoc