Oracle Developer 6i forms and reports client unable to connect with oracle database 11g r2 64 bits by default

Oracle developer 6i wasn't able to connect at (11.2.0.1) oracle database with default multi-byte CHARACTER SET "AL32UTF8" .
altering the single-byte CHARACTER SET as "WE8MSWIN1252" then developer able to connected.

(From some pc's developer 6i builder just flash out (close)
and from another pc its says form designer need to close because of  unable to run .)

Info:-
oracle database version
---------------------------
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
PL/SQL Release 11.2.0.1.0 - Production
CORE    11.2.0.1.0    Production
TNS for 64-bit Windows: Version 11.2.0.1.0 - Production
NLSRTL Version 11.2.0.1.0 - Production

OS is :- Windows enterprize server 2008 R2




Developer forms builder 6i.
 
Below are the steps to alter the CHARACTER SET.
(first test it at testing server)

SQL> shutdown immediate
SQL> startup mount
SQL> alter system enable restricted session;
SQL> alter system set job_queue_processes=0;
SQL> alter system set aq_tm_processes=0;
SQL> alter database open;

SQL> ALTER DATABASE CHARACTER SET WE8MSWIN1252;
SQL> shutdown immediate
SQL> startup


To see the value of CHARACTER SET

SELECT value$ FROM sys.props$ WHERE name = 'NLS_CHARACTERSET' ;



or

SELECT * FROM NLS_DATABASE_PARAMETERS;

[Note :-

"ALTER DATABASE CHARACTER SET INTERNAL_USE WE8MSWIN1252"

It strongly recommend that you not use the INTERNAL_USE clause unless Oracle support explicitly tells you to do so. As the name implies, INTERNAL_USE is not properly documented and is not designed to be used by customers in the field.

To change the NLS_CHARACTERSET or NLS_NCHAR_CHARACTERSET by updating props$ . This is NOT supported and WILL corrupt your database. This is one of the best way's to destroy a complete dataset. Oracle Support will TRY to help you out of this but Oracle will NOT warrant that the data can be recoverd or recovered data is correct. Most likely you WILL be asked to do a FULL export and a COMPLETE rebuild of the database.
225912.1. ]

EXP-00011: SCOTT.BONUS does not exist when exporting...

exp and imp is not fully supported in oracle 11g, try to use expdp and impdp
just an example is
 
"Deferred segment creation in oracle 11g is the "exp" utility doesn't support it properly. Tables with no segments don't get exported as expected. One solution is to turn off the functionality before creating any objects using the following command.

ALTER SYSTEM SET DEFERRED_SEGMENT_CREATION=FALSE;

Alternatively, you can force the allocation of extents on any table with no rows using the following command.

ALTER TABLE tablename ALLOCATE EXTENT;



workaround or live example
==========================

 SQL*Plus: Release 11.2.0.1.0 Production on Wed Dec 26 13:02:41 2012  
 Copyright (c) 1982, 2010, Oracle. All rights reserved.  
 SQL>  
 SQL> $exp system/system@orcl_3 file='d:/scott.dmp'  
 tables=scott.emp,scott.dept,scott.bonus  
 Export: Release 11.2.0.1.0 - Production on Wed Dec 26 13:03:44 2012  
 Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights  
 reserved.  
 Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 -  
 64bit Production  
 With the Partitioning, OLAP, Data Mining and Real Application Testing  
 options  
 Export done in WE8MSWIN1252 character set and AL16UTF16 NCHAR character  
 set  
 About to export specified tables via Conventional Path ...  
 Current user changed to SCOTT  
 . . exporting table              EMP     14 rows  
 exported  
 . . exporting table              DEPT     4 rows  
 exported  
 EXP-00011: SCOTT.BONUS does not exist  
 Export terminated successfully with warnings.  
 SQL>  
 SQL>  
 SQL>  
 SQL> conn scott/tiger@orcl_3  
 Connected.  
 SQL>  
 SQL>  
 SQL>  
 SQL>  
 SQL> ALTER TABLE bonus ALLOCATE EXTENT;  
 Table altered.  
 SQL>  
 SQL>  
 SQL>  
 SQL> $exp system/system@orcl_3 file='d:/scott.dmp'  
 tables=scott.emp,scott.dept,scott.bonus  
 Export: Release 11.2.0.1.0 - Production on Wed Dec 26 13:10:06 2012  
 Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights  
 reserved.  
 Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 -  
 64bit Production  
 With the Partitioning, OLAP, Data Mining and Real Application Testing  
 options  
 Export done in WE8MSWIN1252 character set and AL16UTF16 NCHAR character  
 set  
 About to export specified tables via Conventional Path ...  
 Current user changed to SCOTT  
 . . exporting table              EMP     14 rows  
 exported  
 . . exporting table              DEPT     4 rows  
 exported  
 . . exporting table             BONUS     0 rows  
 exported  
 Export terminated successfully without warnings.  
 SQL>  

ORA-27154: post/wait create failed(CRS-4535 and related to ASM instance) on oracle RAC 11g

ORA-27154: post/wait create failed(CRS-4535 and related to ASM instance)

Workaround
==========

 # crs_stat -t  
 CRS-0184: Cannot communicate with the CRS daemon.  
 # crsctl check crs  
 CRS-4638: Oracle High Availability Services is online  
 CRS-4535: Cannot communicate with Cluster Ready Services  
 CRS-4529: Cluster Synchronization Services is online  
 CRS-4533: Event Manager is online 

 after seeing the grid log and CRSD log, 

 i found that +ASM2 instance is not starting up after reboot. 

 so i tried it manually but not started.  

  $ export ORACLE_SID=+ASM2  
 $ amdcmd  
 ASMCMD> ls  
 ASMCMD-08102: no connection to ASM; command requires ASM to run"  

  Whenever it is tried to start ASM instance manually on the second node 

  below error is shown.  
 

amdcmd> startup;  
 ORA-27154: post/wait create failed  
 ORA-27300: OS system dependent operation:semget failed with status: 28  
 ORA-27301: OS failure message: No space left on device  
 ORA-27302: failure occurred at: sskgpsemsper  

Solution:-

Problem is lower settings of semaphores(/etc/sysctl.conf) value so solution is to increase the semaphores value.

like below......

# vi /etc/sysctl.conf
kernel.sem = 250 32000 100 288

On Red Hat Linux system, in order the affect the setting of the value immediately use,

# /sbin/sysctl -p