Question

SpringBatch + JPA + createEntityManager挂起然后继续工作有时

当我们通过Intellij在本地运行作业时，它可以正常工作。

当我们在服务器上部署相同的代码并在服务器上运行时，它可以正常一次，但如果我们尝试立即再次运行相同的作业， 花费太长时间来创建实体管理器（有时5分钟，有时20分钟......随机但太长）。

它停留在EntityManager em = getFactory（id）.createEntityManager（finalProps）;在EntityManagerCreator类中。

它可以是打开的连接数（？） - 如果前一个实体经理没有正确关闭..但我正在这样做......

由于我的代码太长，所以我创建了一个演示程序，它正在执行相同的操作......下面是我的代码，但这也表现得同样......

public void cleanupRestorePoint(final String jobName, final String stepName) throws SQLException {
Map pmap = new HashMap();
pmap.put("javax.persistence.jdbc.url", "jdbc:oracle:thin:@XXXXX");
pmap.put("javax.persistence.jdbc.password", "aaaa");
pmap.put("javax.persistence.jdbc.user", "bbb");
EntityManagerFactory emf = Persistence.createEntityManagerFactory("JpaDm", pmap);

Connection connection = null;

EntityManager em = null;
try {

    em = emf.createEntityManager(pmap);

    connection = em.unwrap(Connection.class);
    Map<String, Object> properties = emf.getProperties();
    System.out.println("pro" + properties);


    EntityTransaction transaction = em.getTransaction();
    transaction.begin();
    //to do
    transaction.commit();

} catch (Exception e) {
    e.printStackTrace();

}finally{
    em.clear();
    em.close();
    emf.close();
}}

的persistence.xml

<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="2.0"
   xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd">

   <persistence-unit name="JpaDm" transaction-type="RESOURCE_LOCAL">
      <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
      <properties>

         <!-- This property is dynamically set from the application if the DataSource is configured  -->
         <!-- It will also overwrite the following 4 properties - the DB connection ones -->
         <!-- <property name="javax.persistence.nonJtaDataSource" value="java:/comp/env/jdbc/aaaa" /> -->

         <property name="javax.persistence.jdbc.driver" value="oracle.jdbc.OracleDriver" />
         <property name="javax.persistence.jdbc.url" value="jdbc:oracle:thin:@localhost:1521:orcl" />
         <property name="javax.persistence.jdbc.user" value="aaaaa" />
         <property name="javax.persistence.jdbc.password" value="vvvv" />

         <property name="eclipselink.target-database" 
               value="org.eclipse.persistence.platform.database.oracle.OraclePlatform"/>

         <!-- issues with Primitive collections validation -->
         <property name="javax.persistence.validation.mode" value="NONE" />
         <property name="eclipselink.session.customizer"
            value="com.bphx.adaprep.support.ELSessionCustomizer" />

         <!-- <property name="eclipselink.jdbc.batch-writing" value="JDBC"/> -->
         <property name="eclipselink.jdbc.batch-writing" value="oracle-jdbc" />
         <property name="eclipselink.jdbc.batch-writing.size" value="1000"/>

         <!-- Logging -->
         <property name="eclipselink.logging.level" value="WARNING" />
         <!-- property name="eclipselink.profiler" value="PerformanceProfiler"/ -->
         <property name="eclipselink.logging.timestamp" value="true" />
         <property name="eclipselink.logging.session" value="false" />
         <property name="eclipselink.logging.thread" value="false" />
         <property name="eclipselink.ddl-generation.output-mode" value="sql-script" />
         <!-- Needed to add custom indexes -->
         <!-- property name="javax.persistence.sql-load-script-source" value="META-INF/sqlinit.sql" /> -->
         <!-- UNCOMMENT FOR DDL GENERATION / DROP CREATE -->
         <!-- 
         <property name="eclipselink.ddl-generation" value="drop-and-create-tables" /> 
         <property name="eclipselink.application-location" value="dm" /> 
         <property name="eclipselink.create-ddl-jdbc-file-name" value="createDDL.jdbc" />
         <property name="eclipselink.drop-ddl-jdbc-file-name" value="dropDDL.jdbc" />
         <property name="eclipselink.ddl-generation.output-mode" value="both" / 
         -->

         <property name="eclipselink.session-event-listener" value="com.bphx.adaprep.config.ConverterInitializer" />

         <!-- Disable weaving - comment for production usage -->
         <property name="eclipselink.connection-pool.min" value="10"/>
         <property name="eclipselink.connection-pool.max" value="400"/>
         <property name="eclipselink.connection-pool.wait" value="100"/>
         <property name="eclipselink.weaving" value="false" />



      </properties>
   </persistence-unit>
</persistence>

请告诉我有什么办法可以阻止它的挂起.. 如果有任何泄露的资源我如何检查它们？这段代码在本地工作正常，但在Dev环境中提出问题，我没有第三个环境来测试它。

创建一个实体经理太长了 - 它挂了

0 个答案: