THE DATABASE CONNECTION IS LOST :;; WIERD ORA-01012 NOT LOGGED ON ERROR

Question

ERROR: ORA-01012 NOT LOGGED ON ERROR
I AM USING A JAVA SWING INTERFACE (JDK 1.1.8), WHICH USES JNI TO CALL C PROGRAMS WHICH IN TURN CONNECTS TO THE DATABASE, ORACLE 8.1.6.
A DATABASE CONNECTION IS ESTABLISED IN THE MAIN CLASS BY CALLING A FUNCTION FROM THE CONSTRUCTOR.
FOR ALL OTHER FUNCTION CALLS WHICH ARE MADE FROM WITHIN THIS CONSTRUCTOR, THE CONNECTION STAYS.
BUT AFTER THE CONTRUCTOR CALL IS COMPLETE, DATABASE CONNECTION IS STRANGELY LOST. THUS ALL OTHER FUNCTION CALLS FAIL BECAUSE OF CONNECTION ISSUES GIVING ORA-01012. THOUGH IF I CHECK UP IN THE DATABASE, THE CONNECTION DOES FIND AN ENTRY.
SO IT APPEARS THAT SOMEHOW THE JAVA INTERFACE LOOSES TRACK OF CONNECTION. BUT STRANGELY ALL THE FUNCTIONS WORK IF CALLED FROM THE CONSTRUCTOR......... BUT THATS NOT THE IDEA.
PLEASE HELP, THIS PROBLEM IS BUGGING ME FOR WEEKS NOW.
THANKS
AMIT

Answer 1

apologise for the caps lock.
i am working on a previous system with java swing front end which alread uses jni, and connects to database using pro *c.
My problem is that the connection is lost as soon as the constructor of the main class is run, giving an
ORA-1012 NOT LOGGED ON ERROR.
But if i place the same calls in the contructor all the database call work.
It somehow appears that the java interface looses the connection context. Though the session does find entry in the oracle dynamic tables as long as i dont close the front end main window, thereby meaning that its the jave interface which looses the context.
part of the code of the main class eiquser.
//constructor
public EiqUser() {
     super();
     initMRI();
private void initMRI() {
     try {
          /* initialize geoManager environment */
          int rccc = new EiqCfuncs().eiqInitEnv();
//eiqinitenv is a c function which connects to database using pro *C
          EiqCfuncs cfuncs = new EiqCfuncs();
          //EiqCfuncs has the prototypes of c functions used bye the java interface
          this.ivjFileMenu.setText(cfuncs.eiqGetText(resNum.getTEXT_FILE_MENU())); // sets the menu name
and so on.........
public void eiqUser_WindowClosed(java.awt.event.WindowEvent windowEvent) {
     new EiqCfuncs().eiqTermEnv(); // gives ora-1012 error
//eiqtermenv is supposed to disconnect from data base, but returns an ora-1012 not logged on erro
     return;
//eiqtermenv closes the connection with the data base. But fails in this case. if i place the same call ( eiqtermenv) in the initMRI function or the contructor it succeeds.
Plus if i dont use the java interace and use a c stub for executing the same sequence of functions, then i dont face any problems.
the proc calls exectuted ultimately by...
:::eiqinitenv
exec sql connect using :sqlid identified by sqlpw; // succeeds giving sqlerr.sqlcode=0;
::::eiqterm env
exec sql commit work; //fails giving 0ra-1012 error
exec sql rollback work;
Why is the java interface loosing track of the connection once done with the constructor of the main class?? The session still finds an entry in the oracle dynamic tables.
Please help
Thx
Amit