Error ORA-12154 in Oracle Data Integrator - oracle

Question

I get the error when I run a mapping.
I've created a "New Data Server"
I can successfully test the connection by clicking on "Test Connection" button.
But the mapping cannot be run successfully. The full error message is below:
ODI-1228: Task Merge rows-IKM Oracle Merge-Load USERS fails on the target connection DB-TARGET.
Caused By: java.sql.SQLException: ORA-12154: TNS:невозможно разрешить заданный идентификатор соединения
at oracle.jdbc.driver.T4CTTIoer11.processError(T4CTTIoer11.java:495)
at oracle.jdbc.driver.T4CTTIoer11.processError(T4CTTIoer11.java:447)
at oracle.jdbc.driver.T4C8Oall.processError(T4C8Oall.java:1055)
at oracle.jdbc.driver.T4CTTIfun.receive(T4CTTIfun.java:624)
at oracle.jdbc.driver.T4CTTIfun.doRPC(T4CTTIfun.java:253)
at oracle.jdbc.driver.T4C8Oall.doOALL(T4C8Oall.java:613)
at oracle.jdbc.driver.T4CStatement.doOall8(T4CStatement.java:214)
at oracle.jdbc.driver.T4CStatement.doOall8(T4CStatement.java:38)
at oracle.jdbc.driver.T4CStatement.executeForRows(T4CStatement.java:891)
at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1194)
at oracle.jdbc.driver.OracleStatement.executeInternal(OracleStatement.java:1835)
at oracle.jdbc.driver.OracleStatement.execute(OracleStatement.java:1790)
at oracle.jdbc.driver.OracleStatementWrapper.execute(OracleStatementWrapper.java:301)
at oracle.odi.runtime.agent.execution.sql.SQLCommand.execute(SQLCommand.java:205)
at oracle.odi.runtime.agent.execution.sql.SQLExecutor.execute(SQLExecutor.java:142)
at oracle.odi.runtime.agent.execution.sql.SQLExecutor.execute(SQLExecutor.java:28)
at oracle.odi.runtime.agent.execution.TaskExecutionHandler.handleTask(TaskExecutionHandler.java:52)
at oracle.odi.runtime.agent.execution.SessionTask.processTask(SessionTask.java:206)
at oracle.odi.runtime.agent.execution.SessionTask.doExecuteTask(SessionTask.java:117)
at oracle.odi.runtime.agent.execution.AbstractSessionTask.execute(AbstractSessionTask.java:886)
at oracle.odi.runtime.agent.execution.SessionExecutor$SerialTrain.runTasks(SessionExecutor.java:2225)
at oracle.odi.runtime.agent.execution.SessionExecutor.executeSession(SessionExecutor.java:610)
at oracle.odi.runtime.agent.processor.TaskExecutorAgentRequestProcessor$1.doAction(TaskExecutorAgentRequestProcessor.java:718)
at oracle.odi.runtime.agent.processor.TaskExecutorAgentRequestProcessor$1.doAction(TaskExecutorAgentRequestProcessor.java:611)
at oracle.odi.core.persistence.dwgobject.DwgObjectTemplate.execute(DwgObjectTemplate.java:203)
at oracle.odi.runtime.agent.processor.TaskExecutorAgentRequestProcessor.doProcessStartAgentTask(TaskExecutorAgentRequestProcessor.java:800)
at oracle.odi.runtime.agent.processor.impl.StartSessRequestProcessor.access$1400(StartSessRequestProcessor.java:74)
at oracle.odi.runtime.agent.processor.impl.StartSessRequestProcessor$StartSessTask.doExecute(StartSessRequestProcessor.java:702)
at oracle.odi.runtime.agent.processor.task.AgentTask.execute(AgentTask.java:180)
at oracle.odi.runtime.agent.support.DefaultAgentTaskExecutor$2.run(DefaultAgentTaskExecutor.java:108)
at java.lang.Thread.run(Thread.java:748)
Caused by: Error : 12154, Position : 154, Sql =
MERGE
INTO TARGET.USERS USERS
USING
(
SELECT
USE.NAME AS NAME ,
USE.PASSWD AS PASSWD ,
USE.USER_ROLE AS USER_ROLE
FROM
**SOURCE.USERS#"MySource" USE**
) MERGE_SUBQUERY
ON
(
USERS.NAME = MERGE_SUBQUERY.NAME
)
WHEN NOT MATCHED THEN
INSERT
(
NAME ,
PASSWD ,
USER_ROLE
)
VALUES
(
MERGE_SUBQUERY.NAME ,
MERGE_SUBQUERY.PASSWD ,
MERGE_SUBQUERY.USER_ROLE
)
WHEN MATCHED THEN
UPDATE SET
PASSWD = MERGE_SUBQUERY.PASSWD ,
USER_ROLE = MERGE_SUBQUERY.USER_ROLE , OriginalSql =
MERGE
INTO TARGET.USERS USERS
USING
(
SELECT
USE.NAME AS NAME ,
USE.PASSWD AS PASSWD ,
USE.USER_ROLE AS USER_ROLE
FROM
SOURCE.USERS#"MySource" USE
) MERGE_SUBQUERY
ON
(
USERS.NAME = MERGE_SUBQUERY.NAME
)
WHEN NOT MATCHED THEN
INSERT
(
NAME ,
PASSWD ,
USER_ROLE
)
VALUES
(
MERGE_SUBQUERY.NAME ,
MERGE_SUBQUERY.PASSWD ,
MERGE_SUBQUERY.USER_ROLE
)
WHEN MATCHED THEN
UPDATE SET
PASSWD = MERGE_SUBQUERY.PASSWD ,
USER_ROLE = MERGE_SUBQUERY.USER_ROLE , Error Msg = ORA-12154: TNS:невозможно разрешить заданный идентификатор соединения
at oracle.jdbc.driver.T4CTTIoer11.processError(T4CTTIoer11.java:499)
... 30 more
Don't be confused with russian description of the error ORA-12154.
It means TNS:could not resolve the connect identifier specified.
tnsnames.ora file exists. I can also connect using SQL Developer
After some investigation it seems to me that the line
SOURCE.USERS#"MySource" USE
is the culprit
But before this script was executed ODI executed another script and executed it successfully. Below are its contents:
create database link "MySource" connect to SOURCE identified by <#=odiRef.getInfo("SRC_PASS") #> using '***'

Answer 1

I ran both queries in SQL Developer and replaced <#=odiRef.getInfo("SRC_PASS") #> with the real value.
I could reproduce the error.
I ran the query below to be sure that the dblink had been created:
select * from all_db_links;
Then I ran against a discussion where someone suggested to create dblinks in this way:
create database link "MySource" connect to SOURCE identified by *** using
'(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = oracle.****.***.**)
)
)';
It worked. I could use this link in the subsequent queries. But I noticed that a shorter way was to create a dblink by using SID only:
create database link "MySource" connect to SOURCE identified by *** using oracle;
So I switched to ODI and changed the connection strings used in all the data servers from jdbc:oracle:thin:#<host>:<port>/<service name> to the format jdbc:oracle:thin:#<host>:<port>:<sid>
This resolved the isssue. I could run the mapping successfully.
Not sure why a dblink that is created based on service name cannot be used.
Oracle doesn't forbid it according to the docu
CREATE DATABASE LINK:
https://docs.oracle.com/cd/B19306_01/server.102/b14200/statements_5005.htm