NPE in AbstractSpringJsonRpcController.doPost

[dnault]

For some reason, handler was null when doPost was invoked. What's going on? Does it need to be volatile?

java.lang.NullPointerException: null
	at com.github.therapi.jsonrpc.web.AbstractSpringJsonRpcController.doPost(AbstractSpringJsonRpcController.java:71) ~[therapi-json-rpc-0.4.0.jar!/:na]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_302]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_302]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_302]
	at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_302]
    ...