FullHttpRequest request = new DefaultFullHttpRequest(
HttpVersion.HTTP_1_1, HttpMethod.GET, url.toASCIIString());
request.headers()
.set(HttpHeaderNames.CONTENT_TYPE, HttpHeaderValues.APPLICATION_JSON)
.set(HttpHeaderNames.CONNECTION,HttpHeaderValues.KEEP_ALIVE);
执行url.toASCIIStrin() 方法时：
2019-06-28 09:45:42,695 ------ ERROR [http-nio-8089-exec-1] Caller+0 at org.apache.juli.logging.DirectJDKLog.log(DirectJDKLog.java:181)
- Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Handler dispatch failed; nested exception is java.lang.NoSuchMethodError: io.netty.util.internal.PlatformDependent.allocateUninitializedArray(I)[B] with root cause
java.lang.NoSuchMethodError: io.netty.util.internal.PlatformDependent.allocateUninitializedArray(I)[B
at io.netty.util.AsciiString.<init>(AsciiString.java:222)
at io.netty.util.AsciiString.<init>(AsciiString.java:209)
at io.netty.util.AsciiString.cached(AsciiString.java:1401)
at io.netty.util.AsciiString.<clinit>(AsciiString.java:47)
at io.netty.handler.codec.http.HttpHeaderNames.<clinit>(HttpHeaderNames.java:31)
at com.damai.park.acs.unv.request.TerminalHttpCall.queryLibInfo(TerminalHttpCall.java:107)
at com.damai.park.acs.unv.service.LibInfoServiceImpl.query(LibInfoServiceImpl.java:39)
at com.damai.park.acs.controller.FeignController.queryLibInfo(FeignController.java:60)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:97)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:967)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:901)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872)
pom.xml 中引入的包是：
<dependency>
<groupId>io.netty</groupId>
<artifactId>netty-all</artifactId>
<version>4.1.36.Final</version>
</dependency>
初步查看报错的原因，就是方法找不到，那就可能是jar包依赖问题。google之后发现解决办法，就是加入依赖
<dependency>
<groupId>io.netty</groupId>
<artifactId>netty-all</artifactId>
<version>4.1.36.Final</version>
</dependency>
<dependency>
<groupId>com.corundumstudio.socketio</groupId>
<artifactId>netty-socketio</artifactId>
<version>1.7.17</version>
</dependency>
然后就不报这个错了，就是jar的依赖问题
参考：
https://github.com/mrniko/netty-socketio/issues/496
原文链接：https://blog.csdn.net/u014209205/java/article/details/93970438