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ORA-30683: failure establishing connection to debugger (unable to debug in SQL Dev - Oracle databas

edited May 26, 2016 11:25AM in PL/SQL (MOSC) 3 commentsAnswered ✓

Hi,

I am using Oracle Database 12c on Oracle Database Cloud Service. After creating a connection in SQL Developer, I created a procedure and tried debugging it using the Debugger tool.

1) Opened the procedure in edit mode.

2) Compile it with Compile with debug option

3) Clicked the debug icon to start debugging

But, ultimately, I am getting this error:

Connecting to the database CodeEx.
Executing PL/SQL: ALTER SESSION SET PLSQL_DEBUG=TRUE
Executing PL/SQL: CALL DBMS_DEBUG_JDWP.CONNECT_TCP( '127.0.0.1', '4000' )
ORA-30683: failure establishing connection to debugger
ORA-12541: TNS:no listener
ORA-06512: at "SYS.DBMS_DEBUG_JDWP", line 68

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