ATT.

this case consumer leads to throw

Caused by: java.lang.NoClassDefFoundError: javax/validation/Validation

even while calling no validation method, unless add all validation dependencies to consumer,

that's not awesome.

one more question about ValidationFilter:

why the condition check is isNotEmpty:
ConfigUtils.isNotEmpty(invoker.getUrl().getMethodParameter(invocation.getMethodName(), Constants.VALIDATION_KEY))

and previous version check true or false:
if (invoker.getUrl().getMethodParameter(invocation.getMethodName(), Constants.VALIDATION_KEY, false))