MySQL服务器连接超时

MySQL服务器连接等待超时为28800秒，我的hibernate应用程序一直超时（整个应用程序生命周期约为1小时）

从服务器成功接收的最后一个数据包是4396266毫秒前。最后一个成功发送到服务器的数据包是4405476毫秒前的数据包。 hibernate使用以下c3p0属性，我不明白为什么它会超时，即使整个应用程序运行了大约1个小时，并且空闲时间应该比这少得多。既然hibernate的连接有5000秒的超时值，加上它每300秒检查一次空闲，为什么会发生这种情况

<property name="hibernate.c3p0.min_size">0</property>
<property name="hibernate.c3p0.max_size">200</property>
<property name="hibernate.c3p0.idle_test_period">300</property>
<property name="hibernate.c3p0.timeout">5000</property>

0
200
300
5000

更新：详细错误消息：

Caused by: java.sql.BatchUpdateException: Communications link failure The last packet successfully received from the server was 5,980,742 milliseconds ago. The last packet sent successfully to the server was 5,9\ 87,659 milliseconds ago. at com.mysql.jdbc.PreparedStatement.executeBatchSerially(PreparedStatement.java:2024) at com.mysql.jdbc.PreparedStatement.executeBatch(PreparedStatement.java:1449) at com.mchange.v2.c3p0.impl.NewProxyPreparedStatement.executeBatch(NewProxyPreparedStatement.java:1723) at org.hibernate.jdbc.BatchingBatcher.doExecuteBatch(BatchingBatcher.java:70) at org.hibernate.jdbc.BatchingBatcher.addToBatch(BatchingBatcher.java:56) at org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:2421) ... 15 more Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure The last packet successfully received from the server was 5,980,742 milliseconds ago. The last packet sent successfully to the server was 5,9\ 87,659 milliseconds ago. 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:407) at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1116) at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:3358) at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1970) at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2150) at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2626) at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2119) at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2415) at com.mysql.jdbc.PreparedStatement.executeBatchSerially(PreparedStatement.java:1976) ... 20 more 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:3339) 原因：java.sql.BatchUpdateException:通信链路故障 从服务器成功接收的最后一个数据包是5980742毫秒前的数据包。成功发送到服务器的最后一个数据包是5,9\ 87659毫秒前。 位于com.mysql.jdbc.PreparedStatement.executeBatchSerially（PreparedStatement.java:2024） 位于com.mysql.jdbc.PreparedStatement.executeBatch（PreparedStatement.java:1449） 在com.mchange.v2.c3p0.impl.NewProxyPreparedStatement.executeBatch（NewProxyPreparedStatement.java:1723） 位于org.hibernate.jdbc.BatchingBatcher.doExecuteBatch（BatchingBatcher.java:70） 位于org.hibernate.jdbc.BatchingBatcher.addToBatch（BatchingBatcher.java:56） 位于org.hibernate.persister.entity.AbstractEntityPersister.update（AbstractEntityPersister.java:2421） ... 还有15个 原因：com.mysql.jdbc.exceptions.jdbc4.CommunicationsException:通信链路故障 从服务器成功接收的最后一个数据包是5980742毫秒前的数据包。成功发送到服务器的最后一个数据包是5,9\ 87659毫秒前。 位于sun.reflect.NativeConstructorAccessorImpl.newInstance0（本机方法） 位于sun.reflect.NativeConstructorAccessorImpl.newInstance（NativeConstructorAccessorImpl.java:39） 在sun.reflect.DelegatingConstructorAccessorImpl.newInstance（DelegatingConstructorAccessorImpl.java:27） 位于java.lang.reflect.Constructor.newInstance（Constructor.java:513） 位于com.mysql.jdbc.Util.HandleneInstance（Util.java:407） 位于com.mysql.jdbc.SQLError.createCommunicationsException（SQLError.java:1116） 在com.mysql.jdbc.MysqlIO.send上（MysqlIO.java:3358） 位于com.mysql.jdbc.MysqlIO.sendCommand（MysqlIO.java:1970） 位于com.mysql.jdbc.MysqlIO.sqlQueryDirect（MysqlIO.java:2150） 位于com.mysql.jdbc.ConnectionImpl.execSQL（ConnectionImpl.java:2626） 位于com.mysql.jdbc.PreparedStatement.executeInternal（PreparedStatement.java:2119） 位于com.mysql.jdbc.PreparedStatement.executeUpdate（PreparedStatement.java:2415） 位于com.mysql.jdbc.PreparedStatement.executeBatchSerially（PreparedStatement.java:1976） ... 20多 原因：java.net.SocketException:管道断裂 位于java.net.SocketOutputStream.socketWrite0（本机方法） 位于java.net.SocketOutputStream.socketWrite（SocketOutputStream.java:92） 位于java.net.SocketOutputStream.write（SocketOutputStream.java:136） 位于java.io.BufferedOutputStream.flushBuffer（BufferedOutputStream.java:65） 位于java.io.BufferedOutputStream.flush（BufferedOutputStream.java:123） 在com.mysql.jdbc.MysqlIO.send上（MysqlIO.java:3339）

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您如何知道是SQLServer连接超时？您尚未发布错误消息。@Jim，上面更新了错误消息。您如何知道是SQLServer连接超时？您尚未发布错误消息。@Jim，上面更新了错误消息。 Caused by: java.sql.BatchUpdateException: Communications link failure The last packet successfully received from the server was 5,980,742 milliseconds ago. The last packet sent successfully to the server was 5,9\ 87,659 milliseconds ago. at com.mysql.jdbc.PreparedStatement.executeBatchSerially(PreparedStatement.java:2024) at com.mysql.jdbc.PreparedStatement.executeBatch(PreparedStatement.java:1449) at com.mchange.v2.c3p0.impl.NewProxyPreparedStatement.executeBatch(NewProxyPreparedStatement.java:1723) at org.hibernate.jdbc.BatchingBatcher.doExecuteBatch(BatchingBatcher.java:70) at org.hibernate.jdbc.BatchingBatcher.addToBatch(BatchingBatcher.java:56) at org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:2421) ... 15 more Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure The last packet successfully received from the server was 5,980,742 milliseconds ago. The last packet sent successfully to the server was 5,9\ 87,659 milliseconds ago. 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:407) at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1116) at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:3358) at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1970) at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2150) at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2626) at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2119) at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2415) at com.mysql.jdbc.PreparedStatement.executeBatchSerially(PreparedStatement.java:1976) ... 20 more 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:3339)