问题描述

当我有一段时间没有进行任何数据库查询时，我认为它必须休眠 - 如果你调用它，则会引发异常；

When I don't make any database queries for some time I think it must sleep - if you then call it an exception is thrown;

java.sql.SQLNonTransientConnectionException: Could not read resultset: unexpected end of stream, read 0bytes from 4
        at org.mariadb.jdbc.internal.SQLExceptionMapper.get(SQLExceptionMapper.java:136)
        at org.mariadb.jdbc.internal.SQLExceptionMapper.throwException(SQLExceptionMapper.java:106)
        at org.mariadb.jdbc.MySQLStatement.executeQueryEpilog(MySQLStatement.java:264)
        at org.mariadb.jdbc.MySQLStatement.execute(MySQLStatement.java:288)
        at org.mariadb.jdbc.MySQLStatement.executeUpdate(MySQLStatement.java:317)
        at org.mariadb.jdbc.MySQLPreparedStatement.executeUpdate(MySQLPreparedStatement.java:156)
        at org.apache.commons.dbcp.DelegatingPreparedStatement.executeUpdate(DelegatingPreparedStatement.java:105)
        at org.apache.commons.dbcp.DelegatingPreparedStatement.executeUpdate(DelegatingPreparedStatement.java:105)
        at com.swifte.database.DBFactory.updateTimeForUser(DBFactory.java:302)
        at com.swifte.database.DBFactory.addInsertToDB(DBFactory.java:275)
        at com.swifte.service.ExposedFunctions.login(ExposedFunctions.java:135)
        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:483)
        at org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:167)
        at org.jboss.resteasy.core.ResourceMethod.invokeOnTarget(ResourceMethod.java:269)
        at org.jboss.resteasy.core.ResourceMethod.invoke(ResourceMethod.java:227)
        at org.jboss.resteasy.core.ResourceMethod.invoke(ResourceMethod.java:216)
        at org.jboss.resteasy.core.SynchronousDispatcher.getResponse(SynchronousDispatcher.java:542)
        at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:524)
        at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:126)
        at org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:208)
        at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:55)
        at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:50)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:295)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:231)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:149)
        at org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:169)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:145)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:97)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:102)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:344)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:856)
        at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:653)
        at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:926)
        at java.lang.Thread.run(Thread.java:745)

有谁知道如何阻止这种情况发生 - 我已经尝试将自动连接属性添加到 URL，但它似乎仍然会发生

Does anyone know how to stop this from happening - I have tried adding the auto connect property to the URL but it still seems to occur

谢谢

推荐答案

这可能会拉长你的记忆，但可能

This may be stretching your memory but could

一段时间

已经 8 个多小时了?如果是这样，可能是 MySQL 不活​​动超时，在 28800 秒后断开连接.我最近遇到了这个问题，发现了一些关于它的问题 - 这个答案 包含解决问题的最佳简单块.简而言之，建议在 DBCP 连接池属性中添加 SELECT 1 的 validationQuery 并设置 testOnBorrow = true.

have been 8+ hours? If so, likely to be the MySQL inactivity timeout, which disconnects after 28800 seconds. I hit this problem recently and found a few SO questions about it - this answer contained the best simple nuggets for solving the problem. In short, would suggest adding a validationQuery of SELECT 1 and setting testOnBorrow = true in the DBCP connection pool properties.

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