maybe we hava a method without args
so it makes a npe like below
Exception in thread "Dubbo-proxy-request-worker-pool-thread-3" java.lang.NullPointerException
at org.apache.dubbo.proxy.worker.RequestWorker.run(RequestWorker.java:65)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:748)
maybe we hava a method without args so it makes a npe like below