Error and Exceptions

Can any one explain me the difference between an Error and an Exception.

An Error is an abnormal condition that should not occur, and a reasonable application should not try to catch.
An Exception indicates a condition that a reasonable application might want to catch and process.

Similar Messages

Web service hangs without any errors and exceptions

hi all,
We have a ejb application web service that is binded with shedular bc to trigger for every 2 hours
and it runs for one and half hours making continous transactions with database..
In the web service a outer for loop will be iterated by fetching list of data from database. And this list will be iterated in the inner for loop.
This logic works fine for sometime, but suddenly after some random period of time without any errors and exceptions the outer for loop gets no list from database
and the inner for loop is never executed and the web service completes processing.
This i can able to see form my log files.
i dont understand why the list is not fetched from the database, is the problem with hibernate or it lost the connection with database,
either case it has to throw exception but the service is not.
otherwise does this is garbage collector issue.
Thanks in advance,
Bye

Without any code to see what's going on we'd be flying blind trying to answer this one.

Runtime Error and Exceptions

Hi,
Could you please tell me "What is difference between Runtime Error and Exceptions"
Thanks & Regards,
Krushna Biswal

If you would like to handle and navigate based on the exception type, this code would help you. btw I'm not familiar with portlet though.
http://sourceforge.net/projects/optionzero
http://sourceforge.net/forum/forum.php?forum_id=666191
You can declare exception type and navigation in faces-config.xml in declarative manner like Struts global exception notion.
Please let me know it's useful or not.
thanks,

Difference Between Errors and Exception?

I want to know what is the difference between Error and Exception?

Everything is sadly enough catchable as Throwable but
you should never catch Errors. They are an indication
that something has gone wrong in the JVM and they are
not recoverable.Although it is clear that Sun recommends against catching Errors (".. indicates
serious problems that a reasonable application should not try to catch.. etc.."), sometimes, it makes sense to catch some type of Errors.
There was that Java editor (I forgot the name) which would catch OutOfMemoryErrors when the user would try to open a file that was too large.
So instead of crashing, the application would recover from the Error, and I personnally thought that was an interesting feature. At least, a better alternative than the whole application failing.

Difference between Error and Exception

Can anyone tell me the difference between error and exception
Thanz

Errors and Exceptions, in a Nutshell
Errors and exceptions both inherit from Throwable, but they differ in these ways:
Exceptions
Can be checked or unchecked
Indicate an error caused by the programmer
Should be handled at the application level
Errors
Are always unchecked
Usually indicate a system error or a problem with a low-level resource
Should be handled at the system level, if possible
pretty much exceptions cause abnormal flow of the program, errors stop it, least thats my idea, it can get pretty complicated, below is a really good link for htat, also, Google it.
http://www.fawcette.com/javapro/2002_09/online/errors_jstreet_09_13_02/
really good site
-brian

What is exact diffrence between Error and Exception

what is exact diffrence between Error and Exception....and also give me
definitions.....i would very thank full to given answer to me.

Error may or may not be handled by the compiler or JVM there are many errors like Assertion error,stack over flow error out of memory error etc..
Exception is the abnormal condition and these may be handled by the compiler.There r many exceptions like clone not supported, interrupted exception,i/o exceptions...Exception can be handled by using try catch blocks.

Difren between Error and Exception

Hi
What is the defrence between Error and Exception in the Java and Why I till now just faced with Execptions not with any Error or Error Subclasses
and thanks

Hi,
From an article:
Errors and exceptions both inherit from Throwable, but they differ in these ways:
Exceptions:-
Can be checked or unchecked
Indicate an error caused by the programmer
Should be handled at the application level
Errors:-
Are always unchecked
Usually indicate a system error or a problem with a low-level resource
Should be handled at the system level, if possible
-Amol

How to see the portal runtime errors and exception

Hi friends,
I am new to the EP. Can you plz let me know how to see the logs of the error occurs during the runtime.
I have got the following error "Error occurs during the rendering of jsp component"
But I am not able to see the logs.
can you plz tell me the exact path to see the error logs
Thanks and regards,
Kuldeep Verma

HI Kuldeep
Yoiu can check the portal Logs and traces in link as the bellow.
http://your_url:portno/nwa
The JSP logs you can trace there.
Just follow the following path after loged in to NWA.
Monitoring -> Logs and Traces ->
Then in the dropdown menu select the Default Trace
Cheers
Chinmaya
Reward for helpful answers

Errors and exceptions in writing large binary data on sockets!!! urgent

hi
I am trying to write large binary data in the form of byte arrays on sockets.
Data is as large as 512KB(== 524288bytes) So i store the data (actually read from a file through FileInputStream ) and then write on the socket with lines like this
DataOutputStream dos =
new DataOutputStream(new BufferedOutputStream(sock.getOutputStream()));
dos.write(b);
/* suppose b is the arrayreference in which data is stored. sometimes i write with that offset + len function*/
dos.flush();
dos.close();
sock.close();
but the program is not stable: sometimes the whole 512KB is read on other side and sometimes less usually 64KB.
The program is unthreaded.
There is another problem : one side(reading or writing) sometimes gives error :
java.net.SocketException: Software caused connection abort: socket write error
please reply and reply soon and give ur suggestions
thanks

hi
I am trying to write large binary data in theform
of byte arrays on sockets.
Data is as large as 512KB(== 524288bytes) So istore
the data (actually read from a file through
FileInputStream ) and then write on the socketwith
lines like this
DataOutputStream dos =
new DataOutputStream(new
BufferedOutputStream(sock.getOutputStream()));
dos.write(b);
/* suppose b is the arrayreference in which datais
stored. sometimes i write with that offset + len
function*/
dos.flush();
dos.close();
sock.close();
but the program is not stable: sometimes the whole
512KB is read on other side and sometimes less
usually 64KB.
The program is unthreaded.
There is another problem : one side(reading or
writing) sometimes gives error :
java.net.SocketException: Software caused
connection abort: socket write error
please reply and reply soon and give ursuggestions
thanksUmm how are you reading the data on the other side?
some of your code snippet might help. Your writing
code seems ok. I've written a file transfer program
in a similar fashion and have successfully testing on
different platforms (AIX, AS400, Solaris, Windows,
etc) without any problems and without needing to set
the buffer sizes with files as large as 600MB and you
said you're testing this on the loopback?
Point here is you should never need to reset any of the default TCP options to get program correctness. The options are more for optimizations and fine tuning. If indeed you need to change the options to get your program to work, then you program wont be able to scale under different load.

Regarding runtime error DBIF_RSQL_SQL_ERROR and exception CX_SY_OPEN_SQL_DB

Hi All,
I am loading a COPA cube from a DSO.
There are about 15million records to be loaded. every time i try loading the data, 1 or 2 Data packages gets stuck and finally it leads to a runtime error DBIF_RSQL_SQL_ERROR with exception CX_SY_OPEN_SQL_DB.
When i checked in SM21 transaction code, i got the following message
10:41:52 BTC 018 500 AMRUKV                     BY O Deadlock occurred
10:41:53 BTC 018 500 AMRUKV                     BY 4 Database error 60 at INS access to table /BIC/FCSDV
10:41:53 BTC 018 500 AMRUKV                     BY 0 > ORA-00060: deadlock detected while waiting for resource
10:41:54 BTC 018 500 AMRUKV                     AB 0 Run-time error "DBIF_RSQL_SQL_ERROR" occurred
10:41:58 BTC 018 500 AMRUKV                     AB 1 > Short dump "080818 104154 s0173bel PB100 " generated
10:41:58 BTC 018 500 AMRUKV                     D0 1 Transaction Canceled 00 671 ( DBIF_RSQL_SQL_ERROR 20080818104154s0173bel_PB1_00 AMRUKV 500 )
In transaction code ST22 i got the following message:
Runtime Errors         DBIF_RSQL_SQL_ERROR
Exception              CX_SY_OPEN_SQL_DB
Date and Time          18.08.2008 10:41:54
Short text
     SQL error in the database when accessing a table.
What happened?
     The database system detected a deadlock and avoided it by rolling back
     your transaction.
What can you do?
     If possible (and necessary), repeat the last database transaction in the
      hope that locking the object will not result in another deadlock.
     Note which actions and input led to the error.
     For further help in handling the problem, contact your SAP administrator
     You can use the ABAP dump analysis transaction ST22 to view and manage
     termination messages, in particular for long term reference.
Error analysis
     An exception occurred that is explained in detail below.
     The exception, which is assigned to class 'CX_SY_OPEN_SQL_DB', was not caught
      in procedure "WRITE_ICFACT" "(FORM)", nor was it propagated by a RAISING clause.
     Since the caller of the procedure could not have anticipated that the
     exception would occur, the current program is terminated.
     The reason for the exception is:
     The database system recognized that your last operation on the database
     would have led to a deadlock.
     Therefore, your transaction was rolled back
     to avoid this.
     ORACLE always terminates any transaction that would result in deadlock.
     The other transactions involved in this potential deadlock
     are not affected by the termination.
How to correct the error
    Database error text........: "ORA-00060: deadlock detected while waiting for
     resource"
    Internal call code.........: "[RSQL/INSR//BIC/FCSDVD_C02 ]"
    Please check the entries in the system log (Transaction SM21).
    If the error occures in a non-modified SAP program, you may be able to
    find an interim solution in an SAP Note.
    If you have access to SAP Notes, carry out a search with the following
    keywords:
    "DBIF_RSQL_SQL_ERROR" "CX_SY_OPEN_SQL_DB"
    "GPD3UMZD6V4YAKZAIWAOCYLV07Y" or "GPD3UMZD6V4YAKZAIWAOCYLV07Y"
    "WRITE_ICFACT"
    If you cannot solve the problem yourself and want to send an error
    notification to SAP, include the following information:
    1. The description of the current problem (short dump)
       To save the description, choose "System->List->Save->Local File
    (Unconverted)".
    2. Corresponding system log
       Display the system log by calling transaction SM21.
       Restrict the time interval to 10 minutes before and five minutes
    after the short dump. Then choose "System->List->Save->Local File
    (Unconverted)".
    3. If the problem occurs in a problem of your own or a modified SAP
    program: The source code of the program
       In the editor, choose "Utilities->More
    Utilities->Upload/Download->Download".
    4. Details about the conditions under which the error occurred or which
    actions and input led to the error.
    The exception must either be prevented, caught within proedure
    "WRITE_ICFACT" "(FORM)", or its possible occurrence must be declared in the
    RAISING clause of the procedure.
    To prevent the exception, note the following:
Can anybody suggest on what can be done?
Thanks in Advance,
Regards
A.T

Hi ,
This is a table space issue....
u will be getting a Dump...as DBIF_RSQL_SQL_ERROR check in ST22. in this DUMP if u scroll down u will find the table for which this is failing. Actually this is like some of the table related to the DSO is not having sufficient space to cary out the transaction. hence it is failing.
U can also see in DB02--> Deadlock....u will see that there is a deadlock for this table. So find the table from ST22 and ask ur basis team to increase the space for this table....
This can be solved only by increasing the space of the table...no other solution....ask help from ur basis team.
Thanks
Sandeep

Runtime Errors UNCAUGHT_EXCEPTION and Exception CX_RSR_COB_PRO_NOT_FOUND

Hi ,
When i tried to load data into my standard cube the following short dump error occure.
The data was updated to PSA but while updating to further data target (my standard cube) the following error occured:
Runtime Errors         UNCAUGHT_EXCEPTION
Exception              CX_RSR_COB_PRO_NOT_FOUND
Date and Time          2010.12.13 10:20:48
Short text
     An exception occurred that was not caught.
What happened?
     The exception 'CX_RSR_COB_PRO_NOT_FOUND' was raised, but it was not caught
      anywhere along
     the call hierarchy.
     Since exceptions represent error situations and this error was not
     adequately responded to, the running ABAP program
      'CL_RSR========================CP' has to be
     terminated.
What can you do?
     Note down which actions and inputs caused the error.
     To process the problem further, contact you SAP system
     administrator.
     Using Transaction ST22 for ABAP Dump Analysis, you can look
     at and manage termination messages, and you can also
     keep them for a long time.
Error analysis
    An exception occurred which is explained in detail below.
    The exception, which is assigned to class 'CX_RSR_COB_PRO_NOT_FOUND', was not
     caught and
    therefore caused a runtime error.
    The reason for the exception is:
    0REQUEST is not a valid characteristic for InfoProvider

Please check the infoobject 0REQUEST, whether it is in active state, if not acivate it.
Check for 0REQUEST Object in Infocube level at characteristics tab, if it is not available try to add this characteristic to cube.
if 0REQUEST is not available, install it from the content and include it in the cube.
rgds, Ghuru

Since trying to update yesterday, my computer won't download any updates and itunes 11.1 says "Internal Error" and gives me the following info when I click on a song or podcast: Exception Name: NSInvalidArgumentException Description: -[_NSConcreteUserNoti

Since trying to update yesterday, my computer won't download any updates and itunes 11.1 says "Internal Error" and gives me the following info when I click on a song or podcast:
Exception Name: NSInvalidArgumentException
Description: -[_NSConcreteUserNotification activationType]: unrecognized selector sent to instance 0x25a06b0
User Info: (null)
0   CoreFoundation                      0x922216fb __raiseError + 219
1   libobjc.A.dylib                     0x920108db objc_exception_throw + 230
2   CoreFoundation                      0x9222563d -[NSObject(NSObject) doesNotRecognizeSelector:] + 253
3   CoreFoundation                      0x9216af77 ___forwarding___ + 487
4   CoreFoundation                      0x9216ad22 _CF_forwarding_prep_0 + 50
5   iTunes                              0x00df38e2 iTunes + 14624994
6   iTunes                              0x00df36ae iTunes + 14624430
7   libobjc.A.dylib                     0x9201c6c5 -[NSObject performSelector:withObject:withObject:] + 77
8   Foundation                          0x93c12d85 -[_NSConcreteUserNotificationCenter _sendDelegateMessage:sendToAppDelegate:withNotificationFromMessage:] + 335
9   Foundation                          0x93c12eaf -[_NSConcreteUserNotificationCenter _notificationPresentedMessage:] + 58
10 Foundation                          0x93c137c2 __block_global_1 + 156
11 libdispatch.dylib                   0x9371b2cf _dispatch_call_block_and_release + 15
12 libdispatch.dylib                   0x9371ea80 _dispatch_client_callout + 46
13 libdispatch.dylib                   0x9371c8e8 _dispatch_main_queue_callback_4CF + 223
14 CoreFoundation                      0x9211b255 __CFRunLoopRun + 1829
15 CoreFoundation                      0x9211a7c4 CFRunLoopRunSpecific + 308
16 CoreFoundation                      0x9211a67b CFRunLoopRunInMode + 123
17 HIToolbox                           0x90b6fc76 RunCurrentEventLoopInMode + 242
18 HIToolbox                           0x90b76eb9 ReceiveNextEventCommon + 374
19 HIToolbox                           0x90b76d34 BlockUntilNextEventMatchingListInMode + 88
20 AppKit                              0x97621923 _DPSNextEvent + 709
21 AppKit                              0x97621167 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 119
22 AppKit                              0x9761d78c -[NSApplication run] + 855
23 iTunes                              0x0017a898 iTunes + 1546392
24 iTunes                              0x0017a709 iTunes + 1545993
25 ???                                 0x00000002 0x0 + 2

Please read this whole message before doing anything.
This procedure is a test, not a solution. Don’t be disappointed when you find that nothing has changed after you complete it.
Step 1
The purpose of this step is to determine whether the problem is localized to your user account.
Enable guest logins* and log in as Guest. Don't use the Safari-only “Guest User” login created by “Find My Mac.”
While logged in as Guest, you won’t have access to any of your personal files or settings. Applications will behave as if you were running them for the first time. Don’t be alarmed by this; it’s normal. If you need any passwords or other personal data in order to complete the test, memorize, print, or write them down before you begin.
Test while logged in as Guest. Same problem?
After testing, log out of the guest account and, in your own account, disable it if you wish. Any files you created in the guest account will be deleted automatically when you log out of it.
*Note: If you’ve activated “Find My Mac” or FileVault, then you can’t enable the Guest account. The “Guest User” login created by “Find My Mac” is not the same. Create a new account in which to test, and delete it, including its home folder, after testing.
Step 2
The purpose of this step is to determine whether the problem is caused by third-party system modifications that load automatically at startup or login, by a peripheral device, or by corruption of certain system caches.
Disconnect all wired peripherals except those needed for the test, and remove all aftermarket expansion cards. Boot in safe mode and log in to the account with the problem. Note: If FileVault is enabled on some models, or if a firmware password is set, or if the boot volume is a software RAID, you can’t do this. Ask for further instructions.
Safe mode is much slower to boot and run than normal, and some things won’t work at all, including sound output and Wi-Fi on certain models. The next normal boot may also be somewhat slow.
The login screen appears even if you usually log in automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.
Test while in safe mode. Same problem?
After testing, reboot as usual (i.e., not in safe mode) and verify that you still have the problem. Post the results of steps 1 and 2.

N unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

some one can help me please
i have no idea what i must to do.
an unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

The Exception Handler gave all the info that you need. No need to print the whole stack trace.
The exception handler says
Exception Details: java.lang.IllegalArgumentException
TABLE1.NAME
Look in the session bean (assuming that is where your underlying rowset is). Look in the _init() method for statements similar to the following:
personRowSet.setCommand("SELECT * FROM TRAVEL.PERSON");
personRowSet.setTableName("PERSON");
What do you have?

Runtimr error OBJECTS_OBJREF_NOT_ASSIGNED and Exception CX_SY_REF_IS_INITI

Hi All
when I schedule any BDC pgm in Background by giving job name in SM36 .
It is giving an runtimr error OBJECTS_OBJREF_NOT_ASSIGNED and Exception CX_SY_REF_IS_INITIAL .
Error analysis
    An exception occurred that is explained in detail below.
    The exception, which is assigned to class 'CX_SY_REF_IS_INITIAL', was not
     caught in
    procedure "C14T_LISTTOOL_CALL_ALV_GRID" "(FUNCTION)", nor was it propagated by
     a RAISING clause.
    Since the caller of the procedure could not have anticipated that the
    exception would occur, the current program is terminated.
    The reason for the exception is:
    You attempted to use a 'NULL' object reference (points to 'nothing')
    access a component (variable: "GRID1").
    An object reference must point to an object (an instance of a class)
    before it can be used to access components.
    Either the reference was never set or it was set to 'NULL' using the
    CLEAR statement.
But it is working fine when i running with options 'N' & 'A' in call transaction. when i execute I'm searching for sap note but not able to find it,
If any one can solve this issue please ... its very urgent requirement
Thanks in Advance

I believe the better forum to post yorr query to, will be [ABAP, General|ABAP Development;.
From the header of that forum:
General questions about the ABAP language and language implementations.
This is not a forum for application specific questions. Web Dynpro , BSP , CRM
development, ... have their own forums.
- Ludek

Cloud service created works fine in local Azure Emulator. But doesnot work when deployed to actual azure and says Restarting (Role has encountered an error and has stopped. Unhandled Exception: System.IO.FileNotFoundException)

Hi,
I have a created a cloud service and when i run locally in azure emulator it works fine. But when I am trying to deploy that to azure it says: Restarting (Role has encountered an error and has stopped.
Unhandled Exception: System.IO.FileNotFoundException)
Can anyone please help me on this.
Thanks,
Satya Chenna

Any specific reason you are having timer on role start up? are you using thread.sleep for longer duration in the method?
If you are using azure diagnostics - make sure these things
1. Azure storage connection string is set to correct storage account and not to the development storage.
2. Check session state provider - local is not supported on azure.
Also you can refer this for more information
http://blogs.msdn.com/b/kwill/archive/2013/09/06/troubleshooting-scenario-3-role-stuck-in-busy.aspx
Bhushan | Blog |
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Error and Exceptions

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