異常javax.servlet.ServletException：通信鏈接失敗：java.io.EOFException

Question

嗨，我通過使用JSP和MySql開發了一個Web應用程序，這是一個通信鏈接失敗錯誤。我嘗試了我的知識，但我沒有解決，請幫助他並給出解決方案。

平台：Linux S / w：Java 1.5.0 Server：Apache Tomcat 5.5.9 DB：mysql-connector-java-5.0.5.jar

堆棧跟蹤：

java.sql.SQLException：通信鏈接失敗：java.io.EOFException，根本原因：null

**開始嵌套例外**

java.io.EOFException

堆棧跟蹤：

com.mysql.jdbc.MysqlIO.readFully（MysqlIO.java:1395）處com.mysql.jdbc.MysqlIO.reuseAndReadPacket（MysqlIO.java:1539）處java.io.EOFException com.mysql.jdbc.MysqlIO.checkErrorPacket（ com.mysql.jdbc.MysqlIO.sendCommand（MysqlIO.java:1168）處com.mysql.jdbc.MysqlIO.sqlQueryDirect（MysqlIO.java:1279）處的mysqlIO.java:1930）com.mysql.jdbc.MysqlIO.sqlQuery處的MysqlIO.java:1168） （MysqlIO.java:1225）位於com.mysql.jdbc.Connection.execSQL（Connection.java:2278）位於com.mysql.jdbc.Connection.execSQL（Connection.java:2237）位於com.mysql.jdbc.Connection。在café.admanya.data.ConnectionPool.getUserConnection（ConnectionPool.java:16）在com.mysql.jdbc.Connection.setAutoCommit（Connection.java:548）在café.admanya.product.ProductData處的execSQL（Connection.java:2218） org.apache.jsp.productDetails_jsp._jspService（productDetails_jsp.java:74）的org.apache.jasper.runtime.HttpJspBase.service（HttpJspBase.java:98）的.getProductDetails（ProductData.java:31）。 org.apache.jasper.s上的http.HttpServlet.service（HttpServlet.java:729） org.apache.jasper.servlet.JspServlet.service的ervlet.JspServletWrapper.service（JspServletWrapper.java:331）org.apache.jasper.servlet.JspServlet.service（JspServlet.java:265）的ervlet.JspServletWrapper.service（JspServletWrapper.java:331）在org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain）處org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:269）處javax.servlet.http.HttpServlet.service（HttpServlet.java:729） .java：188）位於org.apache.catalina.core.ApplicationDispatcher.invoke（ApplicationDispatcher.java:679）位於org.apache.catalina.core.ApplicationDispatcher.processRequest（ApplicationDispatcher.java:461）位於org.apache.catalina。 org.apache.catalina.core.ApplicationDispatcher.forward（ApplicationDispatcher.java:301）的org.tuckey.web.filters.urlrewrite.NormalRewriteUrl.doRewrite（NormalRewriteUrl.java：的core.ApplicationDispatcher.doForward（ApplicationDispatcher.java:399） 183），網址為org.tuckey.web.filters.urlrewrite.RuleChain.handleRewrite（RuleChain.ja va：125）org.tuckey.web.filters.urlrewrite.RuleChain.doRules（RuleChain.java:107）org.tuckey.web.filters.urlrewrite.UrlRewriter.processRequest（UrlRewriter.java:78）org.tuckey org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:215）處的.web.filters.urlrewrite.UrlRewriteFilter.doFilter（UrlRewriteFilter.java:383）在org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain .java：188）位於org.apache.catalina.core.StandardWrapperValve.invoke（StandardWrapperValve.java:213）位於org.apache.catalina.core.StandardContextValve.invoke（StandardContextValve.java:172）位於org.apache.catalina。 org.apache.catalina.valves.ErrorReportValve.invoke（ErrorReportValve.java:117）處的org.apache.catalina.core.StandardEngineValve.invoke（StandardEngineValve.java:108）處的core.StandardHostValve.invoke（StandardHostValve.java:127）在org.apache.jk.server.JkCoyoteHandler.invoke（J上的org.apache.catalina.connector.CoyoteAdapter.service（CoyoteAdapter.java:174） org.apache.jk.common.HandlerRequest.invoke（HandlerRequest.java:291）位於org.apache.jk.common.ChannelSocket.invoke（ChannelSocket.java:775）位於org.apache.jk的kCoyoteHandler.java:200） org.apache.jk.common.ChannelSocket $ SocketConnection.runIt（ChannelSocket.java:897）的.common.ChannelSocket.processConnection（ChannelSocket.java:704）org.apache.tomcat.util.threads.ThreadPool $ ControlRunnable.run （ThreadPool.java:689）在java.lang.Thread.run（Thread.java:595）

**結束嵌套例外**

at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:1714)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:1930)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1168)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1279)
at com.mysql.jdbc.MysqlIO.sqlQuery(MysqlIO.java:1225)
at com.mysql.jdbc.Connection.execSQL(Connection.java:2278)
at com.mysql.jdbc.Connection.execSQL(Connection.java:2237)
at com.mysql.jdbc.Connection.execSQL(Connection.java:2218)
at com.mysql.jdbc.Connection.setAutoCommit(Connection.java:548)
at cafe.admanya.data.ConnectionPool.getUserConnection(ConnectionPool.java:16)
at cafe.admanya.product.ProductData.getProductDetails(ProductData.java:31)
at org.apache.jsp.productDetails_jsp._jspService(productDetails_jsp.java:74)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:331)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:679)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:461)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:399)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301)
at org.tuckey.web.filters.urlrewrite.NormalRewrittenUrl.doRewrite(NormalRewrittenUrl.java:183)
at org.tuckey.web.filters.urlrewrite.RuleChain.handleRewrite(RuleChain.java:125)
at org.tuckey.web.filters.urlrewrite.RuleChain.doRules(RuleChain.java:107)
at org.tuckey.web.filters.urlrewrite.UrlRewriter.processRequest(UrlRewriter.java:78)
at org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:383)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:172)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)
at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:200)
at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:291)
at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:775)
at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:704)
at org.apache.jk.common.ChannelSocket$SocketConnection.runIt(ChannelSocket.java:897)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
at java.lang.Thread.run(Thread.java:595)

**結束嵌套例外**

Answer 1

我認為這意味着您的Servlet與MySQL數據庫的JDBC連接已關閉。 您的應用程序需要丟棄它並打開一個新的。