如何使用Spring處理Broken管道錯誤，（JPA）Hibernate，MySQL

Question

我有一個使用Spring JPA（Hibernate）的Web應用程序和在Tomcat中運行的MySQL。 在一段時間不活動后，我總是得到這個例外：

Caused by: javax.persistence.PersistenceException: org.hibernate.TransactionException: JDBC begin transaction failed: 
        at org.hibernate.jpa.spi.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1763) ~[hibernate-entitymanager-4.3.5.Final.jar:4.3.5.Final]
        at org.hibernate.jpa.spi.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1677) ~[hibernate-entitymanager-4.3.5.Final.jar:4.3.5.Final]
        at org.hibernate.jpa.spi.AbstractEntityManagerImpl.throwPersistenceException(AbstractEntityManagerImpl.java:1771) ~[hibernate-entitymanager-4.3.5.Final.jar:4.3.5.Final]
        at org.hibernate.jpa.internal.TransactionImpl.begin(TransactionImpl.java:64) ~[hibernate-entitymanager-4.3.5.Final.jar:4.3.5.Final]
        at org.springframework.orm.jpa.DefaultJpaDialect.beginTransaction(DefaultJpaDialect.java:67) ~[spring-orm-4.0.3.RELEASE.jar:4.0.3.RELEASE]
        at org.springframework.orm.jpa.JpaTransactionManager.doBegin(JpaTransactionManager.java:380) ~[spring-orm-4.0.3.RELEASE.jar:4.0.3.RELEASE]
        ... 38 common frames omitted
Caused by: org.hibernate.TransactionException: JDBC begin transaction failed: 
        at org.hibernate.engine.transaction.internal.jdbc.JdbcTransaction.doBegin(JdbcTransaction.java:76) ~[hibernate-core-4.3.5.Final.jar:4.3.5.Final]
        at org.hibernate.engine.transaction.spi.AbstractTransactionImpl.begin(AbstractTransactionImpl.java:162) ~[hibernate-core-4.3.5.Final.jar:4.3.5.Final]
        at org.hibernate.internal.SessionImpl.beginTransaction(SessionImpl.java:1435) ~[hibernate-core-4.3.5.Final.jar:4.3.5.Final]
        at org.hibernate.jpa.internal.TransactionImpl.begin(TransactionImpl.java:61) ~[hibernate-entitymanager-4.3.5.Final.jar:4.3.5.Final]
        ... 40 common frames omitted
Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: The last packet successfully received from the server was 48,764,262 milliseconds ago.  The last packet sent successfully to the server wa
s 48,764,262 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) ~[na:1.7.0_55]
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) ~[na:1.7.0_55]
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:1.7.0_55]
        at java.lang.reflect.Constructor.newInstance(Constructor.java:526) ~[na:1.7.0_55]
        at com.mysql.jdbc.Util.handleNewInstance(Util.java:409) ~[mysql-connector-java-5.1.30.jar:na]
        at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1127) ~[mysql-connector-java-5.1.30.jar:na]
        at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:3983) ~[mysql-connector-java-5.1.30.jar:na]
        at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2596) ~[mysql-connector-java-5.1.30.jar:na]
        at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2776) ~[mysql-connector-java-5.1.30.jar:na]
        at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2832) ~[mysql-connector-java-5.1.30.jar:na]
        at com.mysql.jdbc.ConnectionImpl.setAutoCommit(ConnectionImpl.java:5357) ~[mysql-connector-java-5.1.30.jar:na]
        at org.apache.tomcat.dbcp.dbcp.DelegatingConnection.setAutoCommit(DelegatingConnection.java:373) ~[commons-dbcp-eap6.jar:na]
        at org.apache.tomcat.dbcp.dbcp.PoolingDataSource$PoolGuardConnectionWrapper.setAutoCommit(PoolingDataSource.java:330) ~[commons-dbcp-eap6.jar:na]
        at org.hibernate.engine.transaction.internal.jdbc.JdbcTransaction.doBegin(JdbcTransaction.java:72) ~[hibernate-core-4.3.5.Final.jar:4.3.5.Final]
        ... 43 common frames omitted
Caused by: java.net.SocketException: Broken pipe
        at java.net.SocketOutputStream.socketWrite0(Native Method) ~[na:1.7.0_55]
        at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:113) ~[na:1.7.0_55]
        at java.net.SocketOutputStream.write(SocketOutputStream.java:159) ~[na:1.7.0_55]
        at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:82) ~[na:1.7.0_55]
        at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:140) ~[na:1.7.0_55]
        at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:3964) ~[mysql-connector-java-5.1.30.jar:na]
        ... 50 common frames omitted

現在，我明白這與MySQL在8小時后關閉連接並且Hibernate嘗試使用此連接並且我的連接池可能沒有正確配置或根本配置但我不知道如何操作有關。

我甚至在mysql url連接配置中添加了autoReconnect=true ，但它沒有幫助。

這是Tomcat配置的server.xml中的內容。

    <Resource name="jdbc/mysqldb" auth="Container"
      type="javax.sql.DataSource"
    ...  
url="jdbc:mysql://${env.OPENSHIFT_MYSQL_DB_HOST}:${env.OPENSHIFT_MYSQL_DB_PORT}/${env.OPENSHIFT_APP_NAME}?autoReconnect=true"/>

應該配置什么以及在哪里使其工作？

Answer 1

嘗試在hibernate配置中執行類似的操作：

<property name="connection.autoReconnect"> true </ property>
<property name="connection.autoReconnectForPools"> true </ property>
<property name="connection.is-connection-validation-required"> true </ property>

Answer 2

嘗試添加testOnBorrow="true" and validationQuery="SELECT 1" validationInterval="60000"當DB服務器終止連接時會發生這種情況。 添加這些參數后，連接池將在將連接提供給應用程序之前驗證連接。 如果它無效，則將丟棄該連接並創建一個新連接。