java - 持久性单元提示数据源已关闭，即使它没有关闭

Question

我有一个在 Apache TomEE 7.0.4(eclipselink 2.6.4) 上运行的持久单元，但升级到 TomEE 7.1.0(eclipselink 2.7.4) 后，JPA 调用在一段时间后失败。 persistence.xml 是:

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="1.0" xmlns="http://java.sun.com/xml/ns/persistence">
  <persistence-unit name="xxxPU" transaction-type="JTA">
    <exclude-unlisted-classes>false</exclude-unlisted-classes>
    <jta-data-source>xxxDB</jta-data-source>
    <properties>
      <property name="openjpa.jdbc.DBDictionary" value="mysql"/>
      <property name="openjpa.Log" value="DefaultLevel=WARN, Tool=INFO"/>
    </properties>
  </persistence-unit>
</persistence>

tomee.xml中定义的数据源是

  <Resource id="xxxDB" type="javax.sql.DataSource">
        UserName = xxxx
        Password = yyyy
        JdbcDriver = com.mysql.jdbc.Driver
        JdbcUrl = jdbc:mysql://localhost/dbname
        JtaManaged = true
    factory = org.apache.tomcat.jdbc.pool.DataSourceFactory
    ConnectionProperties = autoReconnect=true;autoReconnectForPools=true;zeroDateTimeBehavior=convertToNull;useUnicode=yes;characterEncoding=UTF-8;useSSL=false
    defaultAutoCommit = false
    testOnBorrow = true
    validationQuery = SELECT 1
    validationInterval = 30000
  </Resource>

一段时间后发生故障，日志如下:

15-May-2019 19:12:49.236 SEVERE [ajp-nio-8009-exec-10] org.apache.openejb.core.transaction.EjbTransactionUtil.handleSystemException EjbTransactionUtil.handleSystemException: Exception [EclipseLink-4002] (Eclipse Persistence Services - 2.7.3.v20180807-4be1041): org.eclipse.persistence.exceptions.DatabaseException
Internal Exception: com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: No operations allowed after connection closed.
Error Code: 0

表面上mysql连接已关闭，但实际上并没有。我有一个 servlet，当 HTTP GET 时，证明数据源正常:

@Resource(name=xxxDB)
DataSource dataSource;

....

try (Connection connection = dataSource.getConnection()) {
// do a query to prove connection OK
}

我有一个 cron 作业，每小时获取这个 servlet。即使 JPA 抛出 com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException 之后连接也正常

我的环境Java 8、TomEE 7.1.0、Eclipselink 2.7.3

Answer 1

问题出在 Eclipselink 2.7 上。我已将这些参数添加到数据源:

testOnBorrow = true
testWhileIdle = true
timeBetweenEvictionRuns = 60000 millisecond
testOnReturn = true
validationQuery = SELECT 1
validationInterval = 30000

由于与 apache-tomee-plume 的关闭连接而失败，但对于 apache-tomee-plus 则正常。两者都是 7.1.0 版本，只是“plus”使用 openjpa，而羽流使用 eclipselink。