Question

我的应用程序（在Tomcat服务器上运行）使用atomikos连接池连接mysql数据库。一切正常，除了连接将如果让应用程序服务器闲置几个小时，请关闭。下面是我发生这种情况后再次操作应用程序服务器时收到的错误消息：

:58:28 AM RusticiSoftware.ScormContentPlayer.Util.Logger LogInfo
INFO: Parsing metadata
Aug 15, 2013 9:58:28 AM RusticiSoftware.ScormContentPlayer.DataHelp.JdbcDataHelper ExecuteReturnDbRows
INFO: ExecuteReturnDbRows: failed - The last packet successfully received from the server was 59,735,409     milliseconds ago.  The last packet sent successfully to the server was 59,735,409 milliseconds ago. is longer than the server configured value of 'wait_timeout'. You should consider either expiring and/or testing connection validity before use in your application, increasing the server configured values for client timeouts, or using the Connector/J connection property 'autoReconnect=true' to avoid this problem.

com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: The last packet successfully received from the server was 59,735,409 milliseconds ago.  The last packet sent successfully to the server was 59,735,409 milliseconds ago. is longer than the server configured value of 'wait_timeout'. You should consider either expiring and/or testing connection validity before use in your application, increasing the server configured values for client timeouts, or using the Connector/J connection property 'autoReconnect=true' to avoid this problem.
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1121)
at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:3871)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2484)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2664)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2815)
at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2155)
at com.mysql.jdbc.PreparedStatement.execute(PreparedStatement.java:1379)
at RusticiSoftware.ScormContentPlayer.DataHelp.JdbcDataHelper.ExecuteReturnDbRows(JdbcDataHelper.java:453)
..................................
.................................
.................................

Caused by: java.net.SocketException: Broken pipe
at java.net.SocketOutputStream.socketWrite0(Native Method)
at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:92)
at java.net.SocketOutputStream.write(SocketOutputStream.java:136)
at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:65)
at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:123)
at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:3852)
... 57 more

我在我的jndi参数中将autoReconnect设置为true，但看起来它不起作用。

<Resource name="jdbc/ScormEngineDB" auth="Container"
          type="javax.sql.DataSource" driverClassName="com.mysql.jdbc.Driver"
          url="jdbc:mysql://localhost:3306/wgea_scorm?charset=utf8&amp;useUnicode=true&amp;characterEncoding=utf-8&amp;autoReconnect=true"
          factory="org.apache.tomcat.jdbc.pool.DataSourceFactory"
          username="username" password="password" maxActive="20" maxIdle="10" pinGlobalTxToPhysicalConnection="true" testQuery="select 1"
          maxWait="-1" />

我还在mysql端设置了日志，并发现测试查询（选择1）实际上没有发送到mysql，因为连接已关闭。现在我必须每天早上在问题发生时重启应用服务器。

关于这个的任何想法？

感谢

Answer 1

最后我发现使用Tomcat连接池而不是Atomikos连接池。因此，应在JNDI配置中使用Tomcat连接池参数。应该是这样的：

<Resource name="jdbc/ScormEngineDB" auth="Container"
          type="javax.sql.DataSource" driverClassName="com.mysql.jdbc.Driver"
          url="jdbc:mysql://localhost:3306/wgea_scorm?charset=utf8&amp;useUnicode=true&amp;characterEncoding=utf-8&amp;autoReconnect=true"
          factory="org.apache.tomcat.jdbc.pool.DataSourceFactory"
          username="username" password="password" maxActive="20" maxIdle="10" autoReconnectForConnectionPools="true"   
autoReconnectForPools="true"   pinGlobalTxToPhysicalConnection="true" 
<!-- below are Tomcat connection pool parameters-->
testOnBorrow="true" logValidationErrors="true" validationQuery="select 1" testWhileIdle="true" 
testOnConnect="true" validationInterval="3000000" maxWait="-1" />

validationInterval参数可以设置为比数据库连接超时短的值，以便连接可以保持活动状态。关注autoConnection参数，很多人说它不推荐使用，因此可以从上面的JNDI配置中删除它。有关详细信息，请参阅http://tomcat.10.x6.nabble.com/connection-autoReconnect-td4340944.html

atomikos连接shutdown和autoReconnect不起作用

1 个答案: