#KBs_in_Action #1
#Issue :
I've faced this issue while adding an ESXi host 5.0 to a vCenter 5.5, the process failed at 88 %.
When checked the logs, i have found similar alerts in the vmkernel.log :
2012-07-23T14:56:36.728Z cpu1:3015)WARNING: UserObj: 675: Failed to crossdup fd 19, /vmfs/devices/char/vob/Vfat type CHAR: Busy
2012-07-23T14:56:36.728Z cpu1:3015)WARNING: UserObj: 3232: Unimplemented operation on 0x41001c9074b0/SOCKET_UNIX_SERVER
2012-07-23T14:56:36.728Z cpu1:3015)WARNING: UserObj: 675: Failed to crossdup fd 20, /var/run/vmware/vobd-user-ctx.s type SOCKET_UNIX_SERVER: Not implemented
2012-07-23T14:56:46.944Z cpu3:872571)User: 2348: wantCoreDump : vpxa-worker -enabled : 1
2012-07-23T14:56:47.295Z cpu2:872571)UserDump: 1625: Dumping cartel 956510 (from world 872571) to file /var/core/vpxa-zdump.002 ...
2012-07-23T14:58:24.406Z cpu0:872571)UserDump: 1737: Userworld coredump complete.
2012-07-23T14:58:24.554Z cpu3:3015)WARNING: UserObj: 675: Failed to crossdup fd 3, /vmfs/devices/char/vob/Scsi type CHAR: Busy
#Solution :
then i have applied KB article and it did fix the issue :
VMware KB: VMware ESXi 5.0/5.1 host fails to reconnect to VMware vCenter Server due to vpxa coredump