Failed to load vcenter ""

We are configuring Vmwaredb, but unable to connect it . Below error is coming.

[root@F1PLA-NMS002 tmp]# /usr/bin/icingacli vspheredb daemon run --trace --debug
Ready to run
DB configuration loaded
Reconnecting to DB
Connected to the database
vCenter ID=2 is now starting
Constructing ServerRunner
Starting for vCenterID=
Initializing vCenter for
Loading sdk/vimService.wsdl
CURL ERROR: Encountered end of file
Server for vCenterID= failed, will try again in 30 seconds
Pid 28624 stopped