Fake call Tx detected with 160 seconds timeout

I just upgraded ESXi hosts to 6 5.5U2 8. 0 b (2809209).  The first host I have improved (a Dell R910) is fine for about a week and then died in the middle of the night Sunday night.  Came to him hung up, couldn't SSH to it, does not respond on the console and was shown as disconnected in vCenter, all virtual machines on it had HA'ed to other hosts.  Should be able to turn off that through iDrac and he came fine.  The syslog feature stopped 9 minutes before the events in vCenter showing he's going down, so I couldn't check the newspaper to see what happened before he went down.  Writing chalked up an anomaly and put back into production.  Less than 24 hours later, woke to pages of our monitoring system of virtual machines on the same host.  These virtual machines are inaccessible.  The host was always sensitive and marked as upward in vCenter.  Cannot open consoles for any of the virtual machines on this host.  Was able to SSH in the host and it was in the vmkernel.log:

(2015 08-11 T 11: 14:52.338Z cpu23:33245) < 6 > 0000:41:00.0 ixgbe: vmnic4: hang Fake Tx detected with 160 seconds timeout

(2015 08-11 T 11: 14:53.340Z cpu23:33256) WARNING: Linnet: netdev_watchdog:3678: NETDEV WATCHDOG: vmnic5: transmit timed out

(2015 08-11 T 11: 14:53.340Z cpu23:33256) < 6 > ixgbe 0000:41:00.1: vmnic5: hang Fake Tx detected with 160 seconds timeout

(2015 08-11 T 11: 14:53.340Z cpu23:33256) WARNING: Linnet: netdev_watchdog:3678: NETDEV WATCHDOG: vmnic4: transmit timed out

(2015 08-11 T 11: 14:53.340Z cpu23:33256) < 6 > 0000:41:00.0 ixgbe: vmnic4: hang Fake Tx detected with 160 seconds timeout

(2015 08-11 T 11: 14:54.342Z cpu19:33251) WARNING: Linnet: netdev_watchdog:3678: NETDEV WATCHDOG: vmnic5: transmit timed out

(2015 08-11 T 11: 14:54.342Z cpu19:33251) < 6 > ixgbe 0000:41:00.1: vmnic5: hang Fake Tx detected with 160 seconds timeout

(2015 08-11 T 11: 14:54.342Z cpu19:33251) WARNING: Linnet: netdev_watchdog:3678: NETDEV WATCHDOG: vmnic4: transmit timed out

(2015 08-11 T 11: 14:54.342Z cpu19:33251) < 6 > 0000:41:00.0 ixgbe: vmnic4: hang Fake Tx detected with 160 seconds timeout

These repeated again and again many times per second.  The host locked again shortly after and had to be restarted to force the VMs system HA to other hosts.

The vmnic4 and vmnic5 are ports on the same Intel NETWORK adapter X 520-2 (two ports), Intel, not the re-brand of Dell version version.  We have two of these network adapters in each host with the ports of the other card of the NETWORK being vmnic6 and vmnic7.  vmnic4 and vmnic6 go to our network local, vmnic5 and 7 go to our iSCSI network.  These cards use the IGB driver (ethtool reports 3.21.6iov * last * with firmware version 0x61c10001).  TSO and LRO are off due to problems that we already had.  I spent yesterday upgrading all the firmware on the host of problem but the Intel X 520 - 2 does not appear to be newer firmware that I can find, even if Dell seems to have a version for it which does not apply to these network cards Intel version.

The host of problem is currently in production with a very low charge on it for more than 24 hours so far and I am increasing the load on a regular basis to see if it eventually bombs again.

Googling "Fake Tx crash detected" results in a lot of older hits, mostly from the Linux IGB problems associated with pilots.  Nothing to really related to VMware.  And nothing that seems relevant.

Any ideas?  Find it me hard to believe that the NIC itself suddenly has gone wrong that this host has been with us for years without problems until we went to 6. 0b.  I have an another R910 which was bought at the same time that I'm tired of the upgrade that I can't have two hosts having problems it would cause problems of capacity within our cluster.

Say that there is no work around and the only solution was to go down to 5.5U2 when I opened a SR with VMware, I discovered other ways there is a workaround script that seems to change the management of interruptions of CPU from automatic to manual, which is supposed to be the cause of this problem.  Why VMware is distributing this script to some people and not others that I don't know, I hope it was just the tech who worked my case not having is no knowledge of the script of the workaround at the time said.

EDIT: I should add that since the purpose of this script to our guests, we have not seen the problem still happen when I had three accidents in the first week.  /knockonwood

Tags: VMware

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