带有Datastax DS驱动程序连接端口的Kundera

Question

我使用带有Datastax DS驱动程序的Kundera来连接Cassandra。在persistence.xml上，我将端口定义为9042。

然而，我注意到Kundera无法连接到Cassandra：

Tests run: 2, Failures: 0, Errors: 2, Skipped: 0, Time elapsed: 0.503 sec <<< FAILURE! - in com.abc.DataServiceImplTest
writeReadTest(com.abc.DataServiceImplTest)  Time elapsed: 0.38 sec  <<< ERROR!
com.impetus.kundera.configure.schema.SchemaGenerationException: Error while opening socket, Caused by: .
    at com.impetus.client.cassandra.schemamanager.CassandraSchemaManager.initiateClient(CassandraSchemaManager.java:718)
    at com.impetus.kundera.configure.schema.api.AbstractSchemaManager.exportSchema(AbstractSchemaManager.java:112)
    at com.impetus.client.cassandra.schemamanager.CassandraSchemaManager.exportSchema(CassandraSchemaManager.java:166)
    at com.impetus.kundera.configure.SchemaConfiguration.configure(SchemaConfiguration.java:191)
    at com.impetus.kundera.configure.ClientMetadataBuilder.buildClientFactoryMetadata(ClientMetadataBuilder.java:48)
    at com.impetus.kundera.persistence.EntityManagerFactoryImpl.configureClientFactories(EntityManagerFactoryImpl.java:408)
    at com.impetus.kundera.persistence.EntityManagerFactoryImpl.configure(EntityManagerFactoryImpl.java:161)
    at com.impetus.kundera.persistence.EntityManagerFactoryImpl.<init>(EntityManagerFactoryImpl.java:135)
    at com.impetus.kundera.KunderaPersistence.createEntityManagerFactory(KunderaPersistence.java:85)
    at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:79)
    at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:54)

一旦我在/etc/cassandra/cassandra.yaml中启用了Thrift端口(9160)，一切就开始工作了。

下面是persistence.xml：

  <persistence-unit name="cassandra_pu">
<provider>com.impetus.kundera.KunderaPersistence</provider>
<class>com.abc.Person</class>
<exclude-unlisted-classes>false</exclude-unlisted-classes>

<properties>
        <property name="kundera.nodes" value="localhost" />
        <property name="kundera.port" value="9042" />
        <property name="kundera.keyspace" value="testkeyspace" />
  <property name="kundera.ddl.auto.prepare" value="update" />
  <property name="kundera.dialect" value="cassandra" />
       <property name="kundera.client.lookup.class"
            value="com.impetus.kundera.client.cassandra.dsdriver.DSClientFactory" />
  <property name="kundera.annotations.scan.package" value="com.abc.impl"/>
</properties>

想知道我是否需要启用9160，即使使用DS-Driver？

谢谢!

Answer 1

kundera.ddl.auto.prepare通过thrift way工作，它工作在端口9160上，但您使用的是datastax提供的com.impetus.kundera.client.cassandra.dsdriver.DSClientFactory &正如您在persistence.xml中提到的那样，它工作在端口9042上。所以，

删除此行

<property name="kundera.ddl.auto.prepare" value="update" />

从你的persistence.xml中可以解决这个问题。