Question

我的问题在于我已经显示的异常块，我可以使用GUI（PL / SQL开发人员）进行连接，但是我的Eclipsedlink在使用Web应用程序获取连接时会出现异常。请帮我。在此先感谢。

我正在使用ojdbc14.jar，我正在使用Normal java（核心）进行连接，但仅使用Eclipse链接存在此问题。

Tesing.java：

        String URL = "jdbc:oracle:thin:@IP:1521:devt2x";
        String USER = "username";
        String PASS = "password";
        Class.forName("oracle.jdbc.driver.OracleDriver");
        conn = DriverManager.getConnection(URL, USER, PASS);
        if(conn != null)
            System.out.println("connects");
        else
            System.out.println("not connects");

ouput :

connects

的tnsnames.ora

CHENNAIDB.WORLD =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = IP)(PORT = 1521))
      (ADDRESS = (PROTOCOL = TCP)(HOST = IP)(PORT = 1526))
    )
    (CONNECT_DATA =
      (SID = devt2x)
    )
  )

的persistence.xml

<property name="javax.persistence.jdbc.driver" value="oracle.jdbc.OracleDriver" />
<property name="javax.persistence.jdbc.url"
                value="jdbc:oracle:thin:@(DESCRIPTION =(ADDRESS_LIST =(ADDRESS=(PROTOCOL = TCP)(HOST = IP)(PORT = 1521)))(CONNECT_DATA = (SERVICE_NAME =  devt2x)(SERVER = DEDICATED)))" />
            <property name="javax.persistence.jdbc.user" value="username" />
            <property name="javax.persistence.jdbc.password" value="password" />

我得到的例外：映射中没有问题

[EL Finer]: 2012-11-20 11:39:39.021--ServerSession(2693887)--Thread(Thread[main,5,main])--DriverManager connect failed, trying direct connect.
[EL Finer]: 2012-11-20 11:39:39.021--ServerSession(2693887)--Thread(Thread[main,5,main])--java.sql.SQLException: ORA-01034: ORACLE not available
ORA-27123: unable to attach to shared memory segment
Linux Error: 13: Permission denied

Answer 1

很可能这是一个权限问题，需要通过向用户提供ORACLE_HOME权限来解决oracle（或者为安装Oracle数据库而创建的任何os用户）。

可以找到更多详细信息here

Java ORA-01034：ORACLE不可用

1 个答案: