Package gets invalidated seemingly at random

Hi, I am experiencing a problem whereby a PL/SQL package is valid for same time (and runs succesfully a few times) and then suddenly becomes invalid in DB. If I recompile package it works for some time and then again gets invalid.
Do you know what might cause such strange behavior.
Also, does anyone know a way of obtaining error information from DB that reports why a package was flagged as invalid?
Also, does anyone know how to obtain dependencies (both direct and indirect) for a package?
Thanks for your help, regards,
-Javier

Thanks a lot Gio for your help. I was asking how to onbtain dependencies just because of the reason you mention.
However if I run your query I get a dependency from the package body on the package. If I run the query on the package body (which is the one that gets flagged as invalid every once in a while) it does not return any dependency.
In fact there are quite a few tables accessed inside the package but the query does not return a dependency on them. Nevertheless those tables are not supposed to be altered, and this problem repeats every day which makes me think that is not the problem.
Thanks a lot,
Javier

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Nitesh,
So, could you help me to know the source where i can find the valuable information related to this.To find the pls for package creation, you can also do the following in your appl_top.
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          ------------------------ end web.xml -----------------------
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          I asked a similar question some time ago and the answer that I got was that each
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          Vladimir
          "ibrahim" <[email protected]> wrote:
          >
          >I am experiencing the following problem and i do not understand
          >the reason. I have an application (3 jsps) in a directory
          >called /private under weblogic 6 sp1
          >directory "DefaultWebApp_myserver". The login.jsp, logout.jsp
          >and logError.jsp exist in directory "DefaultWebApp_myserver"
          >below is the web.xml deployed with the default web application
          >----------------------------------------- web.xml ----
          ><?xml version="1.0" ?>
          ><!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application
          >1.2//EN"
          >"http://java.sun.com/j2ee/dtds/web-app_2_2.dtd">
          ><web-app>
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          ></welcome-file-list>
          ><security-constraint>
          > <web-resource-collection>
          > <web-resource-name> MySecureBit0 </web-resource-name>
          > <description>no description </description>
          > <url-pattern>/private/*</url-pattern>
          > <http-method>GET</http-method>
          > <http-method>POST</http-method>
          > </web-resource-collection>
          > <auth-constraint>
          > <role-name>NBAD_DOMAIN</role-name>
          > </auth-constraint>
          ></security-constraint>
          ><login-config>
          > <auth-method>FORM</auth-method>
          > <realm-name>MyRDBMS Realm</realm-name>
          > <form-login-config>
          > <form-login-page>Login.jsp</form-login-page>
          > <form-error-page>LoginError.jsp</form-error-page>
          > </form-login-config>
          ></login-config>
          ></web-app>
          >---------------------------------------------------------
          >I have another application war. This application consist of
          >2 jsp files. Below is the web.xml
          >------------------------ end web.xml -----------------------
          >
          ><?xml version="1.0" ?>
          ><!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application
          >1.2//EN"
          >"http://java.sun.com/j2ee/dtds/web-app_2_2.dtd">
          ><web-app>
          ><welcome-file-list>
          ><welcome-file>/private/checkCredentials.jsp</welcome-file>
          ></welcome-file-list>
          ><security-constraint>
          > <web-resource-collection>
          > <web-resource-name> MySecureBit0 </web-resource-name>
          > <description>no description </description>
          > <url-pattern>/*</url-pattern>
          > <http-method>GET</http-method>
          > <http-method>POST</http-method>
          > </web-resource-collection>
          > <auth-constraint>
          > <role-name>Engineer</role-name>
          > </auth-constraint>
          ></security-constraint>
          ><login-config>
          > <auth-method>FORM</auth-method>
          > <realm-name>MyRDBMS Realm</realm-name>
          > <form-login-config>
          > <form-login-page>../Login.jsp</form-login-page>
          > <form-error-page>../LoginError.jsp</form-error-page>
          > </form-login-config>
          ></login-config>
          ></web-app>
          >------------------------------ end web.xml ----------------------
          >Now i login in the default application that i have i link that takes
          >me to the
          >second app (the war); then i go to the default
          >app and i logout. When i logout i invalidate the session. but it
          > seems that the session is not getting invalided because i can
          >enter the default
          >
          >application and the war test application without login in.
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          >the session
          >is invalidate and i get the login page.
          >I hope i am clear.
          >Thanks
          >Ibrahim
          >

Valid packages goes invalid when executing application

Friends of pl/sql
When we execute our application we find that 2 of our main packiages go invalid for no reason. The packages compiles just fine when we then compile them. So, no syntax errors. But it stops our application with a lovely "existing state of packages have been discarded......." type error. Not too nice.
What are some of the things to check on for why the package goes invalid ?
We are using TOAD and sql*monitor to trace the process at the moment...........
Any solutions out there ?
Environment : Oracle Enterprise Linux 5 on Oracle 11.1.0.6 (latest patch available). Oracle 11 client as well.
Edited by: ow001294 on Apr 15, 2009 9:24 AM

One of my older standard responses (haven't use this in a while)..
Packages tend to fail because of their "package state". A package has a "state" when it contains package level variables/constants etc. and the package is called. Upon first calling the package, the "state" is created in memory to hold the values of those variables etc. If an object that the package depends upon e.g. a table is altered in some way e.g. dropped and recreated, then because of the database dependencies, the package takes on an INVALID status. When you next make a call to the package, Oracle looks at the status and sees that it is invalid, then determines that the package has a "state". Because something has altered that the package depended upon, the state is taken as being out of date and is discarded, thus causing the "Package state has been discarded" error message.
If a package does not have package level variables etc. i.e. the "state" then, taking the same example above, the package takes on an INVALID status, but when you next make a call to the package, Oracle sees it as Invalid, but knows that there is no "state" attached to it, and so is able to recompile the package automatically and then carry on execution without causing any error messages. The only exception here is if the thing that the package was dependant on has changes in such a way that the package cannot compile, in which case you'll get an Invalid package type of error.
And if you want to know how to prevent discarded package states....
Move all constants and variables into a stand-alone package spec and reference those from your initial package. Thus when the status of your original package is invlidated for whatever reason, it has no package state and can be recompiled automatically, however the package containing the vars/const will not become invalidated as it has no dependencies, so the state that is in memory for that package will remain and can continue to be used.
As for having package level cursors, you'll need to make these local to the procedures/functions using them as you won't be able to reference cursors across packages like that (not sure about using REF CURSORS though.... there's one for me to investigate!)
This first example shows the package state being invalided by the addition of a new column on the table, and causing it to give a "Package state discarded" error...
SQL> set serveroutput on
SQL>
SQL> create table dependonme (x number)
2 /
Table created.
SQL>
SQL> insert into dependonme values (5)
2 /
1 row created.
SQL>
SQL> create or replace package mypkg is
2    procedure myproc;
3 end mypkg;
4 /
Package created.
SQL>
SQL> create or replace package body mypkg is
2    v_statevar number := 5; -- this means my package has a state
3
4    procedure myproc is
5      myval number;
6    begin
7      select x
8      into myval
9      from dependonme;
10
11      myval := myval * v_statevar;
12      DBMS_OUTPUT.PUT_LINE('My Result is: '||myval);
13    end;
14 end mypkg;
15 /
Package body created.
SQL>
SQL> exec mypkg.myproc
My Result is: 25
PL/SQL procedure successfully completed.
SQL>
SQL> select object_name, object_type, status from user_objects where object_name = 'MYPKG'
2 /
OBJECT_NAME
OBJECT_TYPE         STATUS
MYPKG
PACKAGE             VALID
MYPKG
PACKAGE BODY        VALID
SQL>
SQL>
SQL> alter table dependonme add (y number)
2 /
Table altered.
SQL>
SQL> select object_name, object_type, status from user_objects where object_name = 'MYPKG'
2 /
OBJECT_NAME
OBJECT_TYPE         STATUS
MYPKG
PACKAGE             VALID
MYPKG
PACKAGE BODY        INVALID
SQL>
SQL> exec mypkg.myproc
BEGIN mypkg.myproc; END;
ERROR at line 1:
ORA-04068: existing state of packages has been discarded
ORA-04061: existing state of package body "SCOTT.MYPKG" has been invalidated
ORA-06508: PL/SQL: could not find program unit being called: "SCOTT.MYPKG"
ORA-06512: at line 1
SQL>
SQL> select object_name, object_type, status from user_objects where object_name = 'MYPKG'
2 /
OBJECT_NAME
OBJECT_TYPE         STATUS
MYPKG
PACKAGE             VALID
MYPKG
PACKAGE BODY        INVALID
SQL>
SQL> exec mypkg.myproc
PL/SQL procedure successfully completed.
SQL>
SQL> select object_name, object_type, status from user_objects where object_name = 'MYPKG'
2 /
OBJECT_NAME
OBJECT_TYPE         STATUS
MYPKG
PACKAGE             VALID
MYPKG
PACKAGE BODY        VALIDAnd this next example shows how having the package variables in their own package spec, allows the package to automatically recompile when it is called even though it became invalidated by the action of adding a column to the table.
SQL> drop table dependonme
2 /
Table dropped.
SQL>
SQL> drop package mypkg
2 /
Package dropped.
SQL>
SQL> set serveroutput on
SQL>
SQL> create table dependonme (x number)
2 /
Table created.
SQL>
SQL> insert into dependonme values (5)
2 /
1 row created.
SQL>
SQL> create or replace package mypkg is
2    procedure myproc;
3 end mypkg;
4 /
Package created.
SQL>
SQL> create or replace package mypkg_state is
2    v_statevar number := 5; -- package state in seperate package spec
3 end mypkg_state;
4 /
Package created.
SQL>
SQL> create or replace package body mypkg is
2    -- this package has no state area
3
4    procedure myproc is
5      myval number;
6    begin
7      select x
8      into myval
9      from dependonme;
10
11      myval := myval * mypkg_state.v_statevar; -- note: references the mypkg_state package
12      DBMS_OUTPUT.PUT_LINE('My Result is: '||myval);
13    end;
14 end mypkg;
15 /
Package body created.
SQL>
SQL> exec mypkg.myproc
My Result is: 25
PL/SQL procedure successfully completed.
SQL>
SQL> select object_name, object_type, status from user_objects where object_name = 'MYPKG'
2 /
OBJECT_NAME
OBJECT_TYPE         STATUS
MYPKG
PACKAGE             VALID
MYPKG
PACKAGE BODY        VALID
SQL>
SQL> alter table dependonme add (y number)
2 /
Table altered.
SQL>
SQL> select object_name, object_type, status from user_objects where object_name = 'MYPKG'
2 /
OBJECT_NAME
OBJECT_TYPE         STATUS
MYPKG
PACKAGE             VALID
MYPKG
PACKAGE BODY        INVALID
SQL>
SQL> exec mypkg.myproc
My Result is: 25
PL/SQL procedure successfully completed.

DBMS_JOB using Packaged Functions but Package goes invalid

Is there any way to check a package while running a PL/SQL procedure to see if it's state is valid and then catch the exception?
In my case usually just calling any function in the package 1x clears it up but the procedure in question runs as a DBMS_JOB it just keeps failing. This procedure could run often enough that Oracle will mark it as broken but I want to give it every shot at execution on time instead of having to make it wait till the next cycle.
What I would like to do is to catch the exception for the package state being invalid and basically have it go back to the beginning of the procedure and give it another try before failing in case it is just a failure because the package has been altered.
Is there any way to do this?

Firstly, I'll copy/paste my standard response regarding package state going invalid as it usually helps to have an understanding of these things...
Packages tend to fail because of their "package state". A package has a "state" when it contains package level variables/constants etc. and the package is called. Upon first calling the package, the "state" is created in memory to hold the values of those variables etc. If an object that the package depends upon e.g. a table is altered in some way e.g. dropped and recreated, then because of the database dependencies, the package takes on an INVALID status. When you next make a call to the package, Oracle looks at the status and sees that it is invalid, then determines that the package has a "state". Because something has altered that the package depended upon, the state is taken as being out of date and is discarded, thus causing the "Package state has been discarded" error message.
If a package does not have package level variables etc. i.e. the "state" then, taking the same example above, the package takes on an INVALID status, but when you next make a call to the package, Oracle sees it as Invalid, but knows that there is no "state" attached to it, and so is able to recompile the package automatically and then carry on execution without causing any error messages. The only exception here is if the thing that the package was dependant on has changes in such a way that the package cannot compile, in which case you'll get an Invalid package type of error.
And if you want to know how to prevent discarded package states....
Move all constants and variables into a stand-alone package spec and reference those from your initial package. Thus when the status of your original package is invlidated for whatever reason, it has no package state and can be recompiled automatically, however the package containing the vars/const will not become invalidated as it has no dependencies, so the state that is in memory for that package will remain and can continue to be used.
As for having package level cursors, you'll need to make these local to the procedures/functions using them as you won't be able to reference cursors across packages like that (not sure about using REF CURSORS though.... there's one for me to investigate!)
This first example shows the package state being invalided by the addition of a new column on the table, and causing it to give a "Package state discarded" error...
SQL> set serveroutput on
SQL>
SQL> create table dependonme (x number)
2 /
Table created.
SQL>
SQL> insert into dependonme values (5)
2 /
1 row created.
SQL>
SQL> create or replace package mypkg is
2    procedure myproc;
3 end mypkg;
4 /
Package created.
SQL>
SQL> create or replace package body mypkg is
2    v_statevar number := 5; -- this means my package has a state
3
4    procedure myproc is
5      myval number;
6    begin
7      select x
8      into myval
9      from dependonme;
10
11      myval := myval * v_statevar;
12      DBMS_OUTPUT.PUT_LINE('My Result is: '||myval);
13    end;
14 end mypkg;
15 /
Package body created.
SQL>
SQL> exec mypkg.myproc
My Result is: 25
PL/SQL procedure successfully completed.
SQL>
SQL> select object_name, object_type, status from user_objects where object_name = 'MYPKG'
2 /
OBJECT_NAME
OBJECT_TYPE         STATUS
MYPKG
PACKAGE             VALID
MYPKG
PACKAGE BODY        VALID
SQL>
SQL>
SQL> alter table dependonme add (y number)
2 /
Table altered.
SQL>
SQL> select object_name, object_type, status from user_objects where object_name = 'MYPKG'
2 /
OBJECT_NAME
OBJECT_TYPE         STATUS
MYPKG
PACKAGE             VALID
MYPKG
PACKAGE BODY        INVALID
SQL>
SQL> exec mypkg.myproc
BEGIN mypkg.myproc; END;
ERROR at line 1:
ORA-04068: existing state of packages has been discarded
ORA-04061: existing state of package body "SCOTT.MYPKG" has been invalidated
ORA-06508: PL/SQL: could not find program unit being called: "SCOTT.MYPKG"
ORA-06512: at line 1
SQL>
SQL> select object_name, object_type, status from user_objects where object_name = 'MYPKG'
2 /
OBJECT_NAME
OBJECT_TYPE         STATUS
MYPKG
PACKAGE             VALID
MYPKG
PACKAGE BODY        INVALID
SQL>
SQL> exec mypkg.myproc
PL/SQL procedure successfully completed.
SQL>
SQL> select object_name, object_type, status from user_objects where object_name = 'MYPKG'
2 /
OBJECT_NAME
OBJECT_TYPE         STATUS
MYPKG
PACKAGE             VALID
MYPKG
PACKAGE BODY        VALIDAnd this next example shows how having the package variables in their own package spec, allows the package to automatically recompile when it is called even though it became invalidated by the action of adding a column to the table.
SQL> drop table dependonme
2 /
Table dropped.
SQL>
SQL> drop package mypkg
2 /
Package dropped.
SQL>
SQL> set serveroutput on
SQL>
SQL> create table dependonme (x number)
2 /
Table created.
SQL>
SQL> insert into dependonme values (5)
2 /
1 row created.
SQL>
SQL> create or replace package mypkg is
2    procedure myproc;
3 end mypkg;
4 /
Package created.
SQL>
SQL> create or replace package mypkg_state is
2    v_statevar number := 5; -- package state in seperate package spec
3 end mypkg_state;
4 /
Package created.
SQL>
SQL> create or replace package body mypkg is
2    -- this package has no state area
3
4    procedure myproc is
5      myval number;
6    begin
7      select x
8      into myval
9      from dependonme;
10
11      myval := myval * mypkg_state.v_statevar; -- note: references the mypkg_state package
12      DBMS_OUTPUT.PUT_LINE('My Result is: '||myval);
13    end;
14 end mypkg;
15 /
Package body created.
SQL>
SQL> exec mypkg.myproc
My Result is: 25
PL/SQL procedure successfully completed.
SQL>
SQL> select object_name, object_type, status from user_objects where object_name = 'MYPKG'
2 /
OBJECT_NAME
OBJECT_TYPE         STATUS
MYPKG
PACKAGE             VALID
MYPKG
PACKAGE BODY        VALID
SQL>
SQL> alter table dependonme add (y number)
2 /
Table altered.
SQL>
SQL> select object_name, object_type, status from user_objects where object_name = 'MYPKG'
2 /
OBJECT_NAME
OBJECT_TYPE         STATUS
MYPKG
PACKAGE             VALID
MYPKG
PACKAGE BODY        INVALID
SQL>
SQL> exec mypkg.myproc
My Result is: 25
PL/SQL procedure successfully completed.---------------------------------------------------------------------------------------------
Secondly, from this above standard response, you can see how to check for package state if you want to determine it programatically.
;)

Hi - When I go into Contacts and type a letter in the search bar to get to last names that begin with that letter I get a list of random names that don't correlate to the letter. My settings are fine. Help ?

Hi. When I go into my contacts and type a letter in the saerch bar to get to a list of last names that begin with that letter I get a list of random names that don't begin or end with the letter. My Settings appear fine. Any insights would be greatly appreciated. Cheers Bill

The search bar is not designed to take you to names beginning with the letter you put in. If you want to do that, use the letters down the side. In the search bar, the device will return results for all contacts that have that have that letter in them. If you type a couple of letters of the name, you'll find what you want faster. Once you get used to how it works, it's quite efficient.
Best of luck.

Problem connecting wirelessly from iMac to NETGEAR router, get invalid password message with WPA and WPA-2 encryption in place but if I remove them, so no security, can connect without a problem. Help!!

Problem connecting wirelessly from iMac to NETGEAR router, get invalid password message with WPA and WPA-2 encryption in place but if I remove them, so no security, can connect without a problem. Help!!

Thank you for your suggestion but I have already had a couple of phone sessions with NETGEAR support and they don't see any problems with the router settings etc. They referred me to Apple support, who helped me discover that it is possible to communicate with the router but only if I turn off the encryption/security software, which I don't want to do. The frustrating thing is that I can connect wirelessly from a laptop running Windows 7 and two Anroid smart phones, with WPA-2 in place, without a problem. Do you have any other ideas?

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