2019-08-02 21:14 GMT+02:00, Neal Cardwell <ncardw...@google.com>: > What's the exact kernel version you are using?
It is the RHEL errata kernel 3.10.0-957.21.3.el7 (rhsa-2019:1481), i need to check if there is a newer one. > Eric submitted a patch recently that may address your issue: > tcp: be more careful in tcp_fragment() > > https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/?id=b617158dc096709d8600c53b6052144d12b89fab > > Would you be able to test your workload with that commit > cherry-picked, and see if the issue still occurs? It only happens on a customer system in production up to now, so most likely not. > That commit was targeted to many stable releases, so you may be able > to pick up that fix from a stable branch. The only thing which is a bit strange, this is a Java client, and I am pretty sure we don’t set a small SO_SNDBUF, if anything it is increased (I need to verify that). Not to worry, I guess I can now with your helpful pointer sort that out with Redhat. gruss Bernd
