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arcserve-KB : UDP | Agentless jobs crash for ESX VM's.

Last Update: 2016-11-23 11:46:08 UTC
Problem: UDP Agentless  VMware backups are crashing.

Error Message:

Error In the Windows event log  -  Afbackend.exe crashed in libcurl.dll

Cause:  VDDK has a known issue that if ipv6 is enabled in the UDP Backup proxy machine, VDDK could crash. 

Ref :  https://www.vmware.com/support/developer/vddk/vddk-600-releasenotes.html

When IPv6 is enabled on one or more network interfaces in a Windows proxy, virtual machine backup can fail while attempting to open a disk with the proxy. The cause is a stack buffer overrun in the libcurl.dll library when trying to enumerate DNS servers having multiple IPv6 network interfaces. Although IPv6 is enabled in all versions of Windows 8 and Windows Server 2012, the only known workaround is to disable IPv6 on the backup proxy's network interfaces. 

How to disable ipv6 :  https://support.microsoft.com/en-us/kb/929852 

Solution:  Disable IPV6 and reboot the Proxy server 
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