遇到错误：
ORA-02068: following severe error from BUSISYS.REGRESS.RDBMS.DEV.US.ORACLE.COM
ORA-00022: 无效的会话 ID; 访问被拒绝
Error: ORA 22
Text: invalid session id; access denied
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Cause: Either the session specified does not exist, or the caller does not
have the privilege to access it.
Action: Specify a valid session ID.
This requires ownership of the session id or the CHANGE_USER privilege.
以上的正常的解释。
下面是可能遇到的不同情况
Distributed Transaction In MTS Using Shared Dblink Fails With Ora-00022 [ID 280247.1]
Symptoms
When using shared dblinks to do a distributed transaction from
MTS to MTS the client might see errors of the form
ORA-02050: transaction 840.21.16 rolled back, some remote DBs may be in-doubt
ORA-02068: following severe error from ...
ORA-00022: invalid session ID; access denied
Cause
Shared servers closed down there by closing the dblink
Solution
Set shared_servers = max_shared_servers in the remote instance
既然是使用shared database link 那我们就查询下是否有这样的dblink
SQL> select NAME from sys.link$ where AUTHUSR is not null;
NAME
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BUSISYS.REGRESS.RDBMS.DEV.US.ORACLE.COM
确实存在，我们只需要drop 掉然后建立非shared database link。
关于shared database link 文章
Understanding and Configuration of Shared Database Link [117171.1]