com.github.tobato.fastdfs.exception.FdfsIOException: 客户端连接服务端出现了io异常:socket io exception occured whi

使用FastDFS上传图片报错。

情景，在使用mavon-editor富文本连续上传多张图片，后端使用FastDFS保存文件，出现一张上传成功，一张上传失败的显现。并且后端报错：

com.github.tobato.fastdfs.exception.FdfsIOException: 客户端连接服务端出现了io异常:socket io exception occured while receive content
	at com.github.tobato.fastdfs.proto.AbstractFdfsCommand.execute(AbstractFdfsCommand.java:48)
	at com.github.tobato.fastdfs.conn.ConnectionManager.execute(ConnectionManager.java:76)
	at com.github.tobato.fastdfs.conn.TrackerConnectionManager.executeFdfsTrackerCmd(TrackerConnectionManager.java:73)
	at com.github.tobato.fastdfs.service.DefaultTrackerClient.getStoreStorage(DefaultTrackerClient.java:39)
	at com.github.tobato.fastdfs.service.DefaultFastFileStorageClient.uploadFile(DefaultFastFileStorageClient.java:53)
	at com.icat.service.impl.FastDFSService.uploadImg(FastDFSService.java:69)
	at com.icat.controller.FileUploadController.uploadImage(FileUploadController.java:69)
	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:209)
	at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:136)
	at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102)
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:877)
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:783)
	at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:991)
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:925)
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:974)
	at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:877)

初步判断为FastDFS服务器连接问题，参考这个博客解决报错问题；

启用防火墙，开启对应FastDFS端口

我查看了一下端口号：（不放图片了）

netstat -tlunp

发现22122和23000是正常开放的

再查看一下防火墙状态，发现防火墙关闭了。也就是说，如果防火墙关闭是无法开放端口的。

systemctl status firewalld.service

打开防火墙

systemctl start firewalld.service

开启端口

firewall-cmd --zone=public --add-port=22122/tcp --permanent
firewall-cmd --zone=public --add-port=23000/tcp --permanent

重载防火墙

firewall-cmd --reload

再次场次连续上传图片成功，搞定。