Spring Jdbc模板中的频繁连接重置

【问题标题】：Frequent Connection reset in Spring Jdbc TemplateSpring Jdbc模板中的频繁连接重置
【发布时间】：2017-01-26 01:26:55
【问题描述】：

我正在使用 JDBC 模板连接到 oracle 数据库。我经常遇到异常，几秒钟后就会消失。当我重试时，我将能够执行 sql 查询。

2016-09-17 12:34:30.404 [ajp-nio-8009-exec-4] ERROR UserController.getcontactInfo - Error while getting contact info
org.springframework.dao.DataAccessResourceFailureException: PreparedStatementCallback; SQL []; Io exception: Connection reset; nested exception is java.sql.SQLRecoverableException: Io exception: Connection reset
    at org.springframework.jdbc.support.SQLErrorCodeSQLExceptionTranslator.doTranslate(SQLErrorCodeSQLExceptionTranslator.java:251) ~[spring-jdbc-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:73) ~[spring-jdbc-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:645) ~[spring-jdbc-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:680) ~[spring-jdbc-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:712) ~[spring-jdbc-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:727) ~[spring-jdbc-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at c.s.c.dao.impl.DaoImpl.getContactInfo(DaoImpl.java:109) ~[classes/:na]
    at c.s.c.service.impl.UserServiceImpl.getContactInfo(UserServiceImpl.java:159) ~[classes/:na]
    at c.s.c.controller.user.UserController.getcontactInfo(UserController.java:95) ~[classes/:na]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_102]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_102]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_102]
    at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_102]
    at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221) [spring-web-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:136) [spring-web-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110) [spring-webmvc-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:832) [spring-webmvc-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:743) [spring-webmvc-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85) [spring-webmvc-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:961) [spring-webmvc-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:895) [spring-webmvc-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:967) [spring-webmvc-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:858) [spring-webmvc-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:622) [servlet-api.jar:na]
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:843) [spring-webmvc-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:729) [servlet-api.jar:na]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292) [catalina.jar:8.0.36]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) [catalina.jar:8.0.36]
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) [tomcat-websocket.jar:8.0.36]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) [catalina.jar:8.0.36]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) [catalina.jar:8.0.36]
    at c.s.c.login.AuthenticationFilter.doFilter(AuthenticationFilter.java:84) [classes/:na]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) [catalina.jar:8.0.36]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) [catalina.jar:8.0.36]
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212) [catalina.jar:8.0.36]
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106) [catalina.jar:8.0.36]
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502) [catalina.jar:8.0.36]
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141) [catalina.jar:8.0.36]
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) [catalina.jar:8.0.36]
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88) [catalina.jar:8.0.36]
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:528) [catalina.jar:8.0.36]
    at org.apache.coyote.ajp.AbstractAjpProcessor.process(AbstractAjpProcessor.java:873) [tomcat-coyote.jar:8.0.36]
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:670) [tomcat-coyote.jar:8.0.36]
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1520) [tomcat-coyote.jar:8.0.36]
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1476) [tomcat-coyote.jar:8.0.36]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_102]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_102]
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-util.jar:8.0.36]
    at java.lang.Thread.run(Thread.java:745) [na:1.8.0_102]
Caused by: java.sql.SQLRecoverableException: Io exception: Connection reset
    at oracle.jdbc.driver.SQLStateMapping.newSQLException(SQLStateMapping.java:101) ~[ojdbc6.jar:Oracle JDBC Driver version - "11.1.0.6.0-Production+"]
    at oracle.jdbc.driver.DatabaseError.newSQLException(DatabaseError.java:112) ~[ojdbc6.jar:Oracle JDBC Driver version - "11.1.0.6.0-Production+"]
    at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:173) ~[ojdbc6.jar:Oracle JDBC Driver version - "11.1.0.6.0-Production+"]
    at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:229) ~[ojdbc6.jar:Oracle JDBC Driver version - "11.1.0.6.0-Production+"]
    at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:458) ~[ojdbc6.jar:Oracle JDBC Driver version - "11.1.0.6.0-Production+"]
    at oracle.jdbc.driver.T4CPreparedStatement.executeForDescribe(T4CPreparedStatement.java:796) ~[ojdbc6.jar:Oracle JDBC Driver version - "11.1.0.6.0-Production+"]
    at oracle.jdbc.driver.T4CPreparedStatement.executeMaybeDescribe(T4CPreparedStatement.java:860) ~[ojdbc6.jar:Oracle JDBC Driver version - "11.1.0.6.0-Production+"]
    at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1186) ~[ojdbc6.jar:Oracle JDBC Driver version - "11.1.0.6.0-Production+"]
    at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:3381) ~[ojdbc6.jar:Oracle JDBC Driver version - "11.1.0.6.0-Production+"]
    at oracle.jdbc.driver.OraclePreparedStatement.executeQuery(OraclePreparedStatement.java:3425) ~[ojdbc6.jar:Oracle JDBC Driver version - "11.1.0.6.0-Production+"]
    at oracle.jdbc.driver.OraclePreparedStatementWrapper.executeQuery(OraclePreparedStatementWrapper.java:1490) ~[ojdbc6.jar:Oracle JDBC Driver version - "11.1.0.6.0-Production+"]
    at org.apache.commons.dbcp.DelegatingPreparedStatement.executeQuery(DelegatingPreparedStatement.java:96) ~[commons-dbcp-1.4.jar:1.4]
    at org.apache.commons.dbcp.DelegatingPreparedStatement.executeQuery(DelegatingPreparedStatement.java:96) ~[commons-dbcp-1.4.jar:1.4]
    at org.springframework.jdbc.core.JdbcTemplate$1.doInPreparedStatement(JdbcTemplate.java:688) ~[spring-jdbc-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:629) ~[spring-jdbc-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    ... 46 common frames omitted

我的连接池设置

datasource.maxActive=10
datasource.maxIdle=10
datasource.initialSize=5
datasource.maxWait=5000

我怀疑是在

中列出的 oracle 驱动程序问题

Oracle JDBC intermittent Connection Issue

https://community.oracle.com/message/3795101

http://www.usn-it.de/index.php/2009/02/20/oracle-11g-jdbc-driver-hangs-blocked-by-devrandom-entropy-pool-empty/

我在 jvm 中设置了以下属性。

-Djava.security.egd=file:///dev/urandom

但它仍然没有帮助。

任何人都面临/面临类似的问题？

【问题讨论】：

  • 确保您配置了验证查询。数据库服务器将在一定时间后关闭空闲连接（可在服务器上配置），因此 dbcp 池中未使用的任何连接都将过时。向池配置添加验证查询将确保在提供给您的代码之前检查并重新建立连接。
  • 您能否更详细地描述一下“经常”是什么意思？
  • 它的发生非常随机。我会说一天10次，我的申请不是那么重。每小时 10-20 个请求。就这样

标签： java spring oracle jdbc jdbctemplate


【解决方案1】：

找到了错误参考，所以我会发布我的评论作为答案。

见Java bug 6202721

似乎即使您明确请求 /dev/urandom，Java 静默也会将其替换为 /dev/random，这跟不上 Linux 上的熵生成。

尝试指定/dev/./urandom。替换是基于显式字符串值发生的，如果您想真正强制 urandom，您必须提供与字符串不匹配但仍解析为相同路径的替代形式。

【讨论】：

  • 但看起来它在 Java 6 中已修复。我使用的是 Java 8。如果我错了，请纠正我。
  • 该错误已作为“不是问题”而关闭，并且没有做任何事情。
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