On Thu, Sep 19, 2019 at 01:42:25PM +0200, Nenad Peric wrote: > I have an update on the networking issue: > - After the deep dive into the logs of the firewall by customer's security > team, it turns out that even though there were some disconnections, the > time-stamps do not match.
I wouldn't necessarily expect them to match, although it would depend on how exactly the disconnect happens. For example: - Firewall sends TCP FIN packets to both ends: => Our client would immediately respond to this, so timestamps should be very close (within seconds). - Firewall drops the entry in its connections table but does not send anything to either side: => Our client which is sending TCP keepalives (or rather, the Linux kernel is) would notice the next time it sends a keepalive, which would be bounced back and cause the connection to close. => Delay could be as long as the keepalive period, so that depends on a bunch of stuff such as VDDK client settings and kernel settings. > This means that we got the disconnected by something else (ESXi or > conversion host perhaps) > - As we mentioned in the chat briefly, there could be general keep-alive > issues on both RHEL (conversion host) and ESXi side. > We changed the keep-alive settings in RHEL, but could not find the > equvalent in VMware as of yet. > - I found on a few spots that there are some vddk (vixDiskLib.nfc*) > settings which can configure NFC keep-alives and timeouts, but I do not > understand it deeply enough to see if anything would help. Yes there's a VDDK setting (vixDiskLib.nfc.ReadTimeoutMs). We don't set it at the moment so AIUI it should default to between 6 and 45 seconds depending on the version of VDDK. > Whatever may be the cause, a retry filter would most likely solve the > problem. Yes I think so too. Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com virt-df lists disk usage of guests without needing to install any software inside the virtual machine. Supports Linux and Windows. http://people.redhat.com/~rjones/virt-df/ _______________________________________________ Libguestfs mailing list Libguestfs@redhat.com https://www.redhat.com/mailman/listinfo/libguestfs