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huckfinn
Contributor
Contributor

KB4338815 KB4284815 KB4339093 KB4338824 vCenter Server 6.0 U2 Host Network Connection Failure

The week before we installed July 2018 MS patches on the vCenter server. Two days later we had an issue of nic flapping on a virtual host that required the nic and system board replaced. However, we also encountered frequent disconnects of the hosts in our environment from the vCenter server that cited host network connection failure. Multiple reboots of the virtual hosts running esxi 6.0 U2 didn't fix it. The issue re-surfaced.

Based on vmware support recommendation we uninstalled KB4338815 only to find that KB4284815 was installed automatically during the uninstall of the first one. That did not resolve the issue. Instead it got worse. More frequent disconnects that would last for about 10 seconds. Then we proceeded to remove all the updates from July. After that we have not seen the disconnect for the past three days. Touch wood!


Please share your experience if you have witnessed the above and what resolutions were taken. I wanted this thread out there so that others in the same boat may find an easy fix by uninstalling the updates.

3 Replies
vijayrana968
Virtuoso
Virtuoso

Thanks for highlighting, I am just going to apply those patches but now need to hold as you informed Smiley Happy Could you please check if Event ID 4227 is triggered in event logs from source TCP/IP in event viewer ?

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msripada
Virtuoso
Virtuoso

Hello,

this is similar to the thread https://communities.vmware.com/thread/592464

https://blogs.msdn.microsoft.com/psssql/2018/07/26/july-10-2018-windows-updates-cause-sql-startup-is...

This is the MS patches which are impacting and their respective fixes.

Thanks,

MS

huckfinn
Contributor
Contributor

Yes, there were event id 4227 on vCenter server until the time the updates were uninstalled. No 4227 for the last three days (since the uninstalls).

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