es7启动出现如下错误 空指针：

2020-09-29 01:09:18.297 [main] INFO c.a.o.canal.adapter.launcher.loader.CanalAdapterService - ## start the canal client adapters.
2020-09-29 01:09:18.297 [main] INFO c.a.otter.canal.client.adapter.support.ExtensionLoader - extension classpath dir: /etc/canal-adapter/plugin
2020-09-29 01:09:18.328 [main] INFO c.a.o.canal.adapter.launcher.loader.CanalAdapterLoader - Load canal adapter: logger succeed
2020-09-29 01:09:18.336 [main] ERROR c.a.o.canal.adapter.launcher.loader.CanalAdapterLoader - Load canal adapter: es7 failed
java.lang.RuntimeException: java.lang.NullPointerException
at com.alibaba.otter.canal.client.adapter.es7x.ES7xAdapter.init(ES7xAdapter.java:54) ~[client-adapter.es7x-1.1.5-SNAPSHOT-jar-with-dependencies.jar:na]
at com.alibaba.otter.canal.adapter.launcher.loader.CanalAdapterLoader.loadAdapter(CanalAdapterLoader.java:225) [client-adapter.launcher-1.1.5-SNAPSHOT.jar:na]
at com.alibaba.otter.canal.adapter.launcher.loader.CanalAdapterLoader.init(CanalAdapterLoader.java:56) [client-adapter.launcher-1.1.5-SNAPSHOT.jar:na]
at com.alibaba.otter.canal.adapter.launcher.loader.CanalAdapterService.init(CanalAdapterService.java:60) [client-adapter.launcher-1.1.5-SNAPSHOT.jar:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_191]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_191]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_191]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_191]
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleElement.invoke(InitDestroyAnnotationBeanPostProcessor.java:365) [spring-beans-5.0.5.RELEASE.jar:5.0.5.RELEASE]
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$Lifec

• Originally posted by @agapple in #2792 (comment)*