ORA-00020: maximum number of processes (150) exceeded

Welcome back to HamidHelal blog.

Sorry for the long delay.

Today i encountered an error from client

ORA-12520: TNS:listener could not find available handler for requested type of server


when i tried to connect to database as admin, i got another error is


ORA-00020: maximum number of processes (150) exceeded


but there is a trick to connect

try,

C:\Users\Administrator>CD C:\app\Administrator\product\11.2.0\dbhome_1\BIN

C:\app\Administrator\product\11.2.0\dbhome_1\BIN>SQLPLUS /NOLOG

SQL*Plus: Release 11.2.0.4.0 Production on Tue Aug 20 00:38:14 2019

Copyright (c) 1982, 2013, Oracle.  All rights reserved.

SQL> CONN /AS SYSDBA
ERROR:
ORA-00020: maximum number of processes (150) exceeded




C:\app\Administrator\product\11.2.0\dbhome_1\BIN>sqlplus -prelim "/ as sysdba"

SQL*Plus: Release 11.2.0.4.0 Production on Tue Aug 20 00:41:43 2019

Copyright (c) 1982, 2013, Oracle.  All rights reserved.

SQL> SHUTDOWN ABORT
ORACLE instance shut down.
SQL> EXIT
Disconnected from ORACLE



C:\app\Administrator\product\11.2.0\dbhome_1\BIN>SQLPLUS / AS SYSDBA

SQL*Plus: Release 11.2.0.4.0 Production on Tue Aug 20 00:43:31 2019

Copyright (c) 1982, 2013, Oracle.  All rights reserved.

Connected to an idle instance.

SQL> STARTUP
ORACLE instance started.

Total System Global Area 1.0255E+10 bytes
Fixed Size                  2290120 bytes
Variable Size            1644170808 bytes
Database Buffers         8589934592 bytes
Redo Buffers               18817024 bytes
Database mounted.
Database opened.
SQL>

Oracle Forms 10g/11g (web version) Keyboard Shortcut Key List

As salamualikum (islamic greetings), brothers and sisters. :)

  Hope you are well with the grace of Almighty Allah (swt)

 

Some times, you may forget about the shortcut key when working in oracle forms.

 To get the list at forms just press Ctrl + K, and you will get all the list.

Here i add in details.

Function	Shortcut Key
Show Shortcut Keys	Ctrl + K
Enter Query	F11
Execute Query	Ctrl + F11
Count Query	F12
Clear Block	F7
Clear Field	F5
Clear Form	F8
Clear Record	F6
Edit	Ctrl + E
Update Record	Ctrl + U
Insert Record	Ctrl + Down
Delete Record	Ctrl + Up
Commit	Ctrl + S
Duplicate Field	Shift + F5
Duplicate Record	Shift + F6
List of values	Ctrl + L
List Tab Pages	F2
Next Field	Tab
Next Record	Down Arrow Key
Next Primary	Key Shift + F7
Next Set of Records	Shift + F8
Previous Field	Shift + Tab
Previous Record	Up Arrow Key
Previous Block	Shift+PageUp
Scroll Down	PageDown
Scroll Up	PageUp
Up	Up Arrow Key
Down	Down Arrow Key
Print	Ctrl + P
Exit	F4
Help	Ctrl + H
Block Menu	Ctrl + B
Display Error	Shift + Ctrl + E

 Thanks for reading the post and congratulation on your success.

Part 1 || ORA-06512: at "SYS.UTL_HTTP", line 1130 ORA-24247: network access denied by access control list (ACL)

As salamualikum (islamic greetings), brothers and sisters. :)

  Hope you are well with the grace of Almighty Allah (swt)

If you confirm about creating Oracle Database ACL (Access Control List ) for 11g and higher,

and getting following error for calling a web service or web address, then this solution if for you.

Error

Error starting at line : 1 in command -
begin
PROC_URL_CALL;
end ;
Error report -
ORA-29273: HTTP request failed
ORA-06512: at "SYS.UTL_HTTP", line 1130
ORA-24247: network access denied by access control list (ACL)
ORA-06512: at "HR.PROC_URL_CALL", line 8
ORA-06512: at line 2
29273. 00000 -  "HTTP request failed"
*Cause:    The UTL_HTTP package failed to execute the HTTP request.
*Action:   Use get_detailed_sqlerrm to check the detailed error message.
           Fix the error and retry the HTTP request.

Where PROC_URL_CALL have the following code,

create or replace PROCEDURE PROC_URL_CALL AS

  l_url            VARCHAR2(500) := 'http://allieditbd.com';
  l_http_request   UTL_HTTP.req;
  l_http_response  UTL_HTTP.resp;
BEGIN
  -- Make a HTTP request and get the response.
  l_http_request  := UTL_HTTP.begin_request(l_url);
  l_http_response := UTL_HTTP.get_response(l_http_request);
  UTL_HTTP.end_response(l_http_response);
END;

and calling the procedure ,

begin
PROC_URL_CALL;
end ;

There is no error in the ACL creation, issue in the procedure where we set default value for url.

remove the http:// and add www.

Now the code will be

create or replace PROCEDURE PROC_URL_CALL AS

  l_url            VARCHAR2(500) := 'www.allieditbd.com';
  l_http_request   UTL_HTTP.req;
  l_http_response  UTL_HTTP.resp;
BEGIN
  -- Make a HTTP request and get the response.
  l_http_request  := UTL_HTTP.begin_request(l_url);
  l_http_response := UTL_HTTP.get_response(l_http_request);
  UTL_HTTP.end_response(l_http_response);
END;

Now run call the procedure

begin
PROC_URL_CALL;
end ;

and you will get

PL/SQL procedure successfully completed.

Thanks for reading the post and congratulation on your success.