ALERT: Support for Leap Seconds in VMware Products

VMware Support AlertThe world’s next leap second adjustment is scheduled for 30th of June 2015 at 23:59:60 UTC.

System administrators need to be aware that this may cause issues on NTP synchronized devices and operating systems. For information on Leap Second and its impact on VMware products, please review the KB article-

Support for Leap Seconds in VMware Products (2115818)

Implications of not upgrading your kernel or enabling Time Skew:

Not all customers will be affected, but those who forgo updating VMware Appliance’s operating system kernel or enable time skew may observe the following issues:

  1. First issue that may be observed is the kernel (simplistically, the Linux operating system) can become hung and require a reboot.
  2. The second issue that may be observed is higher than normal CPU consumption on their Linux appliances where JVM’s are utilized. In the vCenter Server Appliance (VCVA), this problem can manifest itself as high CPU consumption of the ESX Agent Manager (EAM) and other Java-based processes.


0 comments have been added so far

  1. Thanks Rick for the update.

    Whats the impact if customers choose to do nothing ? will adding 1 second to the clock break that many products ?
    do you have any details on the impact of this leap

    thank you


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