Configuring HTTPS/HTTP proxy via VAMI fails with error message "Error in method invocation 'test_host_error'" in vCenter 7.0U3u

Products

• VMware vCenter Server

Issue/Introduction

• Configuring HTTPS/HTTP proxy via VAMI fails with error: "Error in method invocation 'test_host_error'"

• /var/log/vmware/applmgmt/applmgmt.log shows following error.

YYYY-mm-ddTHH:MM:SS AM UTC [36930]ERROR:vmware.vapi.provider.local:Error in invoking com.vmware.appliance.networking.proxy in set - 'test_host_error'
Traceback (most recent call last):
  File "/usr/lib/applmgmt/vapi/lib/vapi_runtime-2.100.0-py2.py3-none-any.whl/vmware/vapi/provider/local.py", line 277, in invoke
    service_id, operation_id, input_value, ctx)
  File "/usr/lib/applmgmt/vapi/lib/vapi_runtime-2.100.0-py2.py3-none-any.whl/vmware/vapi/provider/local.py", line 248, in _invoke_int
    method_result = iface.invoke(ctx, method_id, input_value)
  File "/usr/lib/applmgmt/vapi/lib/vapi_runtime-2.100.0-py2.py3-none-any.whl/vmware/vapi/bindings/skeleton.py", line 371, in invoke
    meth_output = method(**meth_args)
  File "/usr/lib/applmgmt/base/py/vmware/vherd/base/thread_utils.py", line 43, in wrapper
    return sync_call_from_thread(func, *args, **kw)
  File "/usr/lib/applmgmt/base/py/vmware/vherd/base/thread_utils.py", line 13, in sync_call_from_thread
    return threads.blockingCallFromThread(reactor, func, *args, **kw)
  File "/usr/lib/python3.7/site-packages/twisted/internet/threads.py", line 122, in blockingCallFromThread
    result.raiseException()
  File "/usr/lib/python3.7/site-packages/twisted/python/failure.py", line 488, in raiseException
    raise self.value.with_traceback(self.tb)
KeyError: 'test_host_error'

Environment

• This issue only affects vCenter Server 7.0 Update 3u build-24614210

Resolution

• This issue is fixed in vCenter 7.0 U3v build-24730281
• As a workaround, configure proxy by manually editing /etc/sysconfig/proxy. Reference KB: How to configure Proxy Settings for vCenter Server