常见bug ### java.net.SocketException

java.net.SocketException: Software caused connection abort: socket write error

ClientAbortException: java.net.SocketException: Software caused connection abort: socket write error at org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.java:373) at org.apache.tomcat.util.buf.ByteChunk.flushBuffer(ByteChunk.java:437) at org.apache.tomcat.util.buf.ByteChunk.append(ByteChunk.java:351) at org.apache.catalina.connector.OutputBuffer.writeBytes(OutputBuffer.java:396) at org.apache.catalina.connector.OutputBuffer.write(OutputBuffer.java:385) at org.apache.catalina.connector.CoyoteOutputStream.write(CoyoteOutputStream.java:93) at java.io.ObjectOutputStream$BlockDataOutputStream.drain(ObjectOutputStream.java:1847) at java.io.ObjectOutputStream$BlockDataOutputStream.writeByte(ObjectOutputStream.java:1885) at java.io.ObjectOutputStream.writeFatalException(ObjectOutputStream.java:1546) at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:333) at com.cc.das.ufk.StaticInfoServlet.getReservoirStaticInfo(StaticInfoServlet.java:293) at com.cc.das.ufk.StaticInfoServlet.processRequest(StaticInfoServlet.java:72) at com.cc.das.ufk.StaticInfoServlet.doGet(StaticInfoServlet.java:889) at javax.servlet.http.HttpServlet.service(HttpServlet.java:621) at javax.servlet.http.HttpServlet.service(HttpServlet.java:722) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:304) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at com.cc.das.admin.DatabaseConFilter.doFilter(DatabaseConFilter.java:146)

解决方案

程序运行正常，数据也没有出错，后台却老是报这个错误。在网上找了别人写的博客，这个问题的原因有几个： ①：服务器的并发连接数超过了其承载量，服务器会将其中一些连接Down掉； ②：客户关掉了浏览器，而服务器还在给客户端发送数据； ③：浏览器端按了Stop ④：用servlet的outputstream输出流下载图片时，当用户点击取消也会报这个错

花了些功夫最后找出来的原因是：用servlet的response.getOutputStream时，写回多个数据，而客户端没全部接收，可能会报下面这个错误。如: 服务器上写了两条数据 out.writeObject("1"); out.writeObject("2");

客户端只接收一条 in.readObject(url);