Caused by: java.io.IOException: Connection reset by peer

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Caused by: java.io.IOException: Connection reset by peer

错误描述

系统一直稳定运行，直至在nginx中增加SSL证书后，突然出现以下问题：

1. 前端异步请求后端数据无法正常返回，但是请求实际上正常，单独请求是可以获取数据的。
2. 部分静态资源（图片、JS）加载异常
3. 服务器后端抛出Caused by: java.io.IOException: Connection reset by peer异常
4. 浏览器抛出net::ERR_CONTENT_LENGTH_MISMATCH异常

错误日志

Caused by: java.io.IOException: Connection reset by peer
        at sun.nio.ch.FileDispatcherImpl.write0(Native Method) ~[?:1.8.0_151]
        at sun.nio.ch.SocketDispatcher.write(SocketDispatcher.java:47) ~[?:1.8.0_151]
        at sun.nio.ch.IOUtil.writeFromNativeBuffer(IOUtil.java:93) ~[?:1.8.0_151]
        at sun.nio.ch.IOUtil.write(IOUtil.java:65) ~[?:1.8.0_151]
        at sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:471) ~[?:1.8.0_151]
        at org.apache.tomcat.util.net.NioChannel.write(NioChannel.java:124) ~[tomcat-coyote.jar:8.0.47]
        at org.apache.tomcat.util.net.NioBlockingSelector.write(NioBlockingSelector.java:101) ~[tomcat-coyote.jar:8.0.47]
        at org.apache.tomcat.util.net.NioSelectorPool.write(NioSelectorPool.java:172) ~[tomcat-coyote.jar:8.0.47]
        at org.apache.coyote.http11.InternalNioOutputBuffer.writeToSocket(InternalNioOutputBuffer.java:140) ~[tomcat-coyote.jar:8.0.47]
        at org.apache.coyote.http11.InternalNioOutputBuffer.addToBB(InternalNioOutputBuffer.java:198) ~[tomcat-coyote.jar:8.0.47]
        at org.apache.coyote.http11.InternalNioOutputBuffer.access$000(InternalNioOutputBuffer.java:42) ~[tomcat-coyote.jar:8.0.47]
        at org.apache.coyote.http11.InternalNioOutputBuffer$SocketOutputBuffer.doWrite(InternalNioOutputBuffer.java:321) ~[tomcat-coyote.jar:8.0.47]
        at org.apache.coyote.http11.filters.IdentityOutputFilter.doWrite(IdentityOutputFilter.java:84) ~[tomcat-coyote.jar:8.0.47]
        at org.apache.coyote.http11.AbstractOutputBuffer.doWrite(AbstractOutputBuffer.java:256) ~[tomcat-coyote.jar:8.0.47]
        at org.apache.coyote.Response.doWrite(Response.java:491) ~[tomcat-coyote.jar:8.0.47]
        at org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.java:391) ~[catalina.jar:8.0.47]
        ... 57 more

解决方案

在nginx配置文件中工作进程上增加user root;。
示例：

user root;
worker_processes 8;

我也不清楚为什么会出现这样的问题