I got these logs
2017-05-17T18:21:13.052Z warning vpxd[7FC535D487A0] [Originator@6876 sub=VpxProfiler] Init [Vpx::Common::Sso::SsoFactory_CreateFacade(sslContext, ssoFacadeConstPtr)] took 117827 ms
2017-05-17T18:21:13.052Z error vpxd[7FC535D487A0] [Originator@6876 sub=Main] [Init] Init failed: Vpx::Common::Sso::SsoFactory_CreateFacade(sslContext, ssoFacadeConstPtr)
--> Backtrace:
-->
--> [backtrace begin] product: VMware VirtualCenter, version: 6.0.0, build: build-4541948, tag: vpxd
--> backtrace[00] libvmacore.so[0x003C6994]: Vmacore::System::Stacktrace::CaptureWork(unsigned int)
--> backtrace[01] libvmacore.so[0x001F0883]: Vmacore::System::SystemFactoryImpl::CreateQuickBacktrace(Vmacore::Ref<Vmacore::System::Backtrace>&)
--> backtrace[02] libvmacore.so[0x0019A7DD]: Vmacore::Throwable::Throwable(std::string const&)
--> backtrace[03] vpxd[0x00BCC43E]: Vmomi::Fault::SystemError::Exception::Exception(std::string const&)
--> backtrace[04] vpxd[0x00BC9EBA]
--> backtrace[05] vpxd[0x00BB6180]
--> backtrace[06] vpxd[0x00AF44E9]
--> backtrace[07] libc.so.6[0x0001EC36]
--> backtrace[08] vpxd[0x00AF3F3D]
--> [backtrace end]
-->
When I checked VCenter server was not communicating with external psc. Some removed nic from PSC , added back nic and issue resolved.