Java application to act as background job on SAP J2EE server

Hi Folks,
I have a java class(assume, ClassA) in a DC. This class has a method to call a Web Service.
I have to create one more DC, which contains my Java application.
This application should make calls to ClassA's method after every 15 minutes.
I guess I will have to create a servlet for this. Also, I think I can use java.util.Timer for making the regular calls.
Can you please suggest me the ways to proceed on this?
Thanks.

Thanks, Frank.
Yes, we too have a cluster environment. In our case, this scheduler has to run only on one server node.
As per the technical requirements, I went ahead with a Servlet application.
The scheduler is running fine, except one problem.
I need to call an EJB method deployed on the same server.
Below is the code snippet.
InitialContext ctx = new InitialContext();
MyEjbLocalHome objLocalHome = (MyEjbLocalHome) ctx.lookup("localejbs/my.com/abc~myearDC/MyEjbBean");
I am getting ClassCastException at the above line.
I am sure that the local home interface is correct and belongs to the same EJB.
Can you please help me with this?

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Java application crashes due to some problem in native code

Hi All
I have a Java application that calls APIs in a 3rd party DLL(I don't have access to its source code or logs) through my VC++ DLL(Win32) that acts as the wrapper DLL.
The Application has many functionalities and is based on multithreading (both on Java layer as well as C++ layer). Most of the functionalities are working , but when I try to close the application, it crashes.
Moreover the crashing occurs inconstently, sometimes it does not crash. Instead of showing any debug information , it simply creates a error file with disassembly code that I am not able to understand.
Though the error seems like an java error, but actually it seems to be due to native code. I have try catch blocks in my code and also implemented settranslator functionality to get hold of structured/C exceptions. But still I am not able to catch any exceptions.
I am pasting the the contents of the file here:
# An unexpected error has been detected by HotSpot Virtual Machine:
# EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x7c9111de, pid=488, tid=1848
# Java VM: Java HotSpot(TM) Client VM (1.4.2_14-b05 mixed mode)
# Problematic frame:
# C [ntdll.dll+0x111de]
--------------- T H R E A D ---------------
Current thread (0x009d1790): JavaThread "CompilerThread0" daemon [_thread_in_native, id=1848]
siginfo: ExceptionCode=0xc0000005, reading address 0x00000001
Registers:
EAX=0x00000001, EBX=0x00030000, ECX=0x02d17a18, EDX=0x00030278
ESP=0x02c2f8e8, EBP=0x02c2fb08, ESI=0x02d17a10, EDI=0x00000001
EIP=0x7c9111de, EFLAGS=0x00010202
Top of Stack: (sp=0x02c2f8e8)
0x02c2f8e8: 009fa9a0 000000c0 00000008 0811d3d8
0x02c2f8f8: 0000000c 00a2c0e0 00000003 00000004
0x02c2f908: 08018216 00000001 02c2fcc4 08018385
0x02c2f918: 00000002 00000001 02c2f93c 02d06d0c
0x02c2f928: 0802a50a 00000000 00000001 02c2f93c
0x02c2f938: 04a3cb4c 02d01008 02c2f964 0802a850
0x02c2f948: 02c2f96e 00000000 00000007 00000000
0x02c2f958: 04a3cb38 00000004 08018216 00000001
Instructions: (pc=0x7c9111de)
0x7c9111ce: 39 89 bd 0c ff ff ff 8b 46 0c 89 85 68 ff ff ff
0x7c9111de: 8b 10 3b 57 04 0f 85 8c 31 02 00 3b d1 0f 85 84
Stack: [0x02bf0000,0x02c30000), sp=0x02c2f8e8, free space=254k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
C [ntdll.dll+0x111de]
C [MSVCRT.dll+0x1c3c9]
C [MSVCRT.dll+0x1c3e7]
C [MSVCRT.dll+0x1c42e]
V [jvm.dll+0xacda9]
V [jvm.dll+0x17102]
V [jvm.dll+0x16c8d]
V [jvm.dll+0x16dca]
V [jvm.dll+0x170a7]
V [jvm.dll+0x172e8]
V [jvm.dll+0x4dc65]
V [jvm.dll+0x4d894]
V [jvm.dll+0xd3a36]
V [jvm.dll+0xd3a04]
C [MSVCRT.dll+0x2a3b0]
C [kernel32.dll+0xb683]
Current CompileTask:
HotSpot Client Compiler:423 b sun.awt.AWTAutoShutdown.isReadyToShutdown()Z (33 bytes)
--------------- P R O C E S S ---------------
Java Threads: ( => current thread )
0x049d6328 JavaThread "Thread-19" [_thread_blocked, id=1440]
0x049d24d0 JavaThread "Thread-18" [_thread_blocked, id=3620]
0x049d40c8 JavaThread "Thread-17" [_thread_blocked, id=2476]
0x02df0538 JavaThread "TimerQueue" daemon [_thread_blocked, id=3876]
0x00036a78 JavaThread "DestroyJavaVM" [_thread_blocked, id=2448]
0x02e43768 JavaThread "Thread-6" [_thread_blocked, id=3664]
0x02e23130 JavaThread "Thread-4" [_thread_blocked, id=2816]
0x02e21d08 JavaThread "Thread-2" [_thread_blocked, id=3344]
0x02da3f78 JavaThread "Java2D Disposer" daemon [_thread_blocked, id=2528]
0x02da3268 JavaThread "AWT-EventQueue-0" [_thread_in_native, id=4008]
0x02d91f90 JavaThread "AWT-Windows" daemon [_thread_blocked, id=648]
0x02d3a478 JavaThread "AWT-Shutdown" [_thread_blocked, id=2988]
=>0x009d1790 JavaThread "CompilerThread0" daemon [_thread_in_native, id=1848]
0x009d0a90 JavaThread "Signal Dispatcher" daemon [_thread_blocked, id=3568]
0x009ce128 JavaThread "Finalizer" daemon [_thread_blocked, id=1824]
0x009ccda0 JavaThread "Reference Handler" daemon [_thread_blocked, id=3280]
Other Threads:
0x00a0b6e8 VMThread [id=608]
0x00a0d620 WatcherThread [id=3012]
VM state:not at safepoint (normal execution)
VM Mutex/Monitor currently owned by a thread: None
Heap
def new generation total 640K, used 583K [0x10010000, 0x100c0000, 0x104f0000)
eden space 576K, 90% used [0x10010000, 0x10091e40, 0x100a0000)
from space 64K, 99% used [0x100b0000, 0x100bfff8, 0x100c0000)
to space 64K, 0% used [0x100a0000, 0x100a0000, 0x100b0000)
tenured generation total 7772K, used 5451K [0x104f0000, 0x10c87000, 0x14010000)
the space 7772K, 70% used [0x104f0000, 0x10a42d80, 0x10a42e00, 0x10c87000)
compacting perm gen total 8192K, used 8137K [0x14010000, 0x14810000, 0x18010000)
the space 8192K, 99% used [0x14010000, 0x148024e8, 0x14802600, 0x14810000)
Dynamic libraries:
0x00400000 - 0x0040b000 c:\dcsthick\jre\bin\java.exe
0x7c900000 - 0x7c9b0000 C:\WINDOWS\system32\ntdll.dll
0x7c800000 - 0x7c8f5000 C:\WINDOWS\system32\kernel32.dll
0x77dd0000 - 0x77e6b000 C:\WINDOWS\system32\ADVAPI32.dll
0x77e70000 - 0x77f01000 C:\WINDOWS\system32\RPCRT4.dll
0x77c10000 - 0x77c68000 C:\WINDOWS\system32\MSVCRT.dll
0x08000000 - 0x08143000 c:\dcsthick\jre\bin\client\jvm.dll
0x7e410000 - 0x7e4a1000 C:\WINDOWS\system32\USER32.dll
0x77f10000 - 0x77f57000 C:\WINDOWS\system32\GDI32.dll
0x76b40000 - 0x76b6d000 C:\WINDOWS\system32\WINMM.dll
0x76390000 - 0x763ad000 C:\WINDOWS\system32\IMM32.DLL
0x10000000 - 0x10007000 c:\dcsthick\jre\bin\hpi.dll
0x76bf0000 - 0x76bfb000 C:\WINDOWS\system32\PSAPI.DLL
0x00390000 - 0x0039e000 c:\dcsthick\jre\bin\verify.dll
0x003b0000 - 0x003c9000 c:\dcsthick\jre\bin\java.dll
0x003d0000 - 0x003de000 c:\dcsthick\jre\bin\zip.dll
0x02e70000 - 0x02f84000 C:\dcsthick\jre\bin\awt.dll
0x73000000 - 0x73026000 C:\WINDOWS\system32\WINSPOOL.DRV
0x774e0000 - 0x7761d000 C:\WINDOWS\system32\ole32.dll
0x5ad70000 - 0x5ada8000 C:\WINDOWS\SYSTEM32\uxtheme.dll
0x02fe0000 - 0x03031000 C:\dcsthick\jre\bin\fontmanager.dll
0x73760000 - 0x737a9000 C:\WINDOWS\system32\ddraw.dll
0x73bc0000 - 0x73bc6000 C:\WINDOWS\system32\DCIMAN32.dll
0x73940000 - 0x73a10000 C:\WINDOWS\system32\D3DIM700.DLL
0x74720000 - 0x7476b000 C:\WINDOWS\system32\MSCTF.dll
0x755c0000 - 0x755ee000 C:\WINDOWS\system32\msctfime.ime
0x03320000 - 0x0333c000 C:\dcsthick\lib\CrewsDmApiJniNt.dll
0x031b0000 - 0x031bb000 c:\dcsthick\lib\CRWNT_DM.dll
0x03240000 - 0x03249000 c:\dcsthick\lib\BAT_API.dll
0x03340000 - 0x03352000 c:\dcsthick\lib\DC_DSM32.dll
0x03360000 - 0x03369000 c:\dcsthick\lib\CRWTOOLS.dll
0x77c00000 - 0x77c08000 C:\WINDOWS\system32\VERSION.dll
0x03370000 - 0x0337a000 c:\dcsthick\lib\PMAPI.dll
0x5d090000 - 0x5d12a000 C:\WINDOWS\system32\COMCTL32.dll
0x03790000 - 0x037b2000 c:\dcsthick\ResaDLL\DC_DSMNB.dll
0x5b860000 - 0x5b8b4000 C:\WINDOWS\system32\NETAPI32.dll
0x038d0000 - 0x038f2000 c:\dcsthick\ResaDLL\DC_DSMIP.dll
0x71ad0000 - 0x71ad9000 C:\WINDOWS\system32\WSOCK32.dll
0x71ab0000 - 0x71ac7000 C:\WINDOWS\system32\WS2_32.dll
0x71aa0000 - 0x71aa8000 C:\WINDOWS\system32\WS2HELP.dll
0x71a50000 - 0x71a8f000 C:\WINDOWS\system32\mswsock.dll
0x662b0000 - 0x66308000 C:\WINDOWS\system32\hnetcfg.dll
0x71a90000 - 0x71a98000 C:\WINDOWS\System32\wshtcpip.dll
0x76f20000 - 0x76f47000 C:\WINDOWS\system32\DNSAPI.dll
0x76fb0000 - 0x76fb8000 C:\WINDOWS\System32\winrnr.dll
0x76f60000 - 0x76f8c000 C:\WINDOWS\system32\WLDAP32.dll
0x66580000 - 0x6658f000 C:\WINDOWS\system32\pnrpnsp.dll
0x76fc0000 - 0x76fc6000 C:\WINDOWS\system32\rasadhlp.dll
0x032e0000 - 0x0330a000 C:\dcsthick\lib\ResaHostConnection.dll
0x03250000 - 0x03257000 c:\dcsthick\lib\CRWNT_GWALC.dll
0x03310000 - 0x03319000 c:\dcsthick\lib\ALCAPI.dll
0x763b0000 - 0x763f9000 C:\WINDOWS\system32\comdlg32.dll
0x77f60000 - 0x77fd6000 C:\WINDOWS\system32\SHLWAPI.dll
0x7c9c0000 - 0x7d1d7000 C:\WINDOWS\system32\SHELL32.dll
0x773d0000 - 0x774d3000 C:\WINDOWS\WinSxS\x86_Microsoft.Windows.Common-Controls_6595b64144ccf1df_6.0.2600.2982_x-ww_ac3f9c03\comctl32.dll
VM Arguments:
jvm_args: -Dcfdynaproppath=c:\dcsthick/config/ -Dcfdynapropxml=RESA_KCOdynamicproperties.xml -DConfigPath=c:\dcsthick/config/RESA_KCOConfig.xml -DResolution=High -DWorkstationID=GWGTE -DMode=GateBoarding -DlogPath=c:\temp\kcologs -DlogInformation=0 -DGateway=ALCSQ1 -DNetBiosPort=A
java_command: com.singaporeair.dcs.standalone.application.model.ApplicationModel SQ/IGATEADXX
Launcher Type: SUN_STANDARD
Environment Variables:
JAVA_HOME=c:\dcsthick\jre\bin
PATH=c:\dcsthick\jre\bin;c:\dcsthick/lib;c:\dcsthick/ResaDLL
USERNAME=USER
OS=Windows_NT
PROCESSOR_IDENTIFIER=x86 Family 6 Model 15 Stepping 13, GenuineIntel
--------------- S Y S T E M ---------------
OS: Windows XP Build 2600 Service Pack 2
CPU:total 2 family 6, cmov, cx8, fxsr, mmx, sse, sse2
Memory: 4k page, physical 1039600k(565656k free), swap 2501208k(2091128k free)
vm_info: Java HotSpot(TM) Client VM (1.4.2_14-b05) for windows-x86, built on Mar 14 2007 16:46:11 by "java_re" with MS VC++ 6.0
The JAVA Application during initialisation establishes a connection with the host server for various devices. For each of the device it establishes a separate connection and keeps listening on these connections using multithreading.
During App close, we need to close each of these connections one by one for each device.
The opening /closing of connection is done by 3rd party DLL and call to there APIs is done through a C++ Wrapper DLL that I have built between the Java layer and their DLL.
When we close the Application, I am always able to close the connections on the first 2 devices. Then all of a sudden it crashes either for the 3rd device conn. close or for the 4th one. The code is the same for all the devices . That too sometimes it just goes fine without crashing. If its a null pointer exception, why is it that it crashes on some occassions and not in other times. More importantly, why is it that it does not fail for the first 2 devices , but fails for the 3rd or 4th device connection close?
Can please anyone help me. Please suggest me as to how I can determine the cause of the error.
And is this error really coming in ntdll.dll or is it getting caused of my dll?

The opening /closing of connection is done by 3rd party DLL and call to there APIs is done through a C++ Wrapper DLL that I have built between the Java layer and their DLL.The specific error indicates a pointer/memory problem.
The first place that is likely is in your code.
The second most likely place for the cause is because you are using the third party library incorrectly. For example before exiting you are supposed to clean up resources and you are not doing so.
As a remote possibility, much less likely that either of the above, there is a bug in jnative or in the 3rd party library.

Thai font support on solaris 2.6 sun os 5.6 sparc for java application

how to install new fonts on solaris 2.6 sparc sun os 5.6. what are the necessary changes we have to make inorder to use new fonts in a java application. the requirement is to install thai language fonts that will be used by a java application to print online/batch job using text/postscript documents. advise on how to do it. kindly mail me at <[email protected]>
thanks in advanse

It is recommended for you to upgrade the JDK version to the J2SE 1.2.x versions which provides better support for the Thai fonts.
You can download the localised version of Thai JDK 1.2.x for Solaris from :
http://www.sun.com.sg/developers/thailand/index.html

BWREMOTE background job canceled in sap r/3 system

Hi my friends,
Thanks for your help ahead.
Today I checked the background job in SAP R/3 created by BWREMOTE via SM37. It showed me some jobs had been canceled.
I displayed its log, the detail message is:
==========================================
Step 001 started (program SBIE0001, variant &0000000083494, user name BWREMOTE)
DATASOURCE = ZQM_NOT_SHFGRP
Call up of customer enhancement BW_BTE_CALL_BW204010_E (BTE) with 1,593 records
Result of customer enhancement: 1,593 records
Call up of customer enhancement EXIT_SAPLRSAP_001 (CMOD) with 1,593 records
ABAP/4 processor: SAPSQL_INVALID_FIELDNAME
Job cancelled
==========================================
Then I displayed the "Long Text" of the job log. It is
One of the field names in the SELECT clause was not recognized.
Error analysis
The SELECT clause was specified in an internal table at runtime.
It contains the field name "TPR00", but this does not occur in any of
the database tables listed in the FROM clause.
Information on where termination occurred
The termination occurred in the ABAP/4 program "SAPLXRSA " in
"EXIT_SAPLRSAP_001".
The main program was "SBIE0001 ".
Source code extract
008840 concatenate 'TPR'
008850 day_temp+6(2)
008860 ' = '
008870 ' ''' zshift '''' into
008880 cond .
008890 append cond to itab .
008900 select schkz into i_not_shfgrp-zzschkz from t552a
008910 where zeity = '2'
008920 and mofid = 'CN'
008930 and mosid = '28'
008940 and ( schkz = 'SFTA' or
008950 schkz = 'SFTB' or
008960 schkz = 'SFTC' or
008970 schkz = 'SFTD' )
008980 and kjahr = day_temp+0(4)
008990 and monat = day_temp+4(2)
> and (itab) .
009010 endselect.
I guess that there is not a field named TPR00 in table t552a.
Next, I opened the 'project management of sap enhancement' via CMOD, entering the project name and chosing 'Display'.
Then Double click the Components 'EXIT_SAPLRSAP_001', we can see the function module 'EXIT_SAPLRSAP_001'. In the source codes, there is an include program, it is 'INCLUDE ZXRSAU01.'.
Then, I double clicked the Include program and find the position program terminated. The source codes are:
ZQM_NOT_SHFGRP *
when 'ZQM_NOT_SHFGRP'.
loop at c_t_data into i_not_shfgrp .
l_tabix = sy-tabix .
clear :mbatch ,zshift,cond ,zfield, zcharg, day_temp .
refresh itab.
if i_not_shfgrp-ausvn is initial.
else.
aa = '080000'.
bb = '160000'.
cc = '235959'.
day_temp = i_not_shfgrp-ausvn.
if i_not_shfgrp-auztv ge aa and
i_not_shfgrp-auztv lt bb .
zshift = 'MSHF' .
elseif i_not_shfgrp-auztv ge bb and
i_not_shfgrp-auztv le cc .
zshift = 'LSHF'.
else .
zshift = 'NSHF'.
day_temp = i_not_shfgrp-ausvn - 1.
endif.
concatenate 'TPR'
day_temp+6(2)
' = '
' ''' zshift '''' into
cond .
append cond to itab .
select schkz into i_not_shfgrp-zzschkz from t552a
where zeity = '2'
and mofid = 'CN'
and mosid = '28'
and ( schkz = 'SFTA' or
schkz = 'SFTB' or
schkz = 'SFTC' or
schkz = 'SFTD' )
and kjahr = day_temp+0(4)
and monat = day_temp+4(2)
and (itab) .
endselect.
endif.
I found that we got a TPR00 during concatenation. In other words, day_temp+6(2) = 00. But I think it is impossible. I can not explain this.
Any ideas, my friends. Many thanks.

select schkz into i_not_shfgrp-zzschkz from t552a
where zeity = '2'
and mofid = 'CN'
and mosid = '28'
and ( schkz = 'SFTA' or
schkz = 'SFTB' or
schkz = 'SFTC' or
schkz = 'SFTD' )
and kjahr = day_temp+0(4)
and monat = day_temp+4(2)
and (itab) . => doesn't make sense?!
endselect.
endif.
it seems something got deleted between 'and' and '(itab)'... so, you'll have to recheck the requirements for your select to fill the 'and' statement further.
so, it should look like
and monat = day_temp+4(2)
and <some kind of condition that needs to be fulfilled>.
endselect.
<some logic to fill a line in your internal table>.
append cond to itab.
endif.
obviously <some kind of condition that needs to be fulfilled> needs to be replaced by a real condition
and <some logic to fill a line in your internal table> needs to be replaced by some kind of formula
I assume something like (otherwise it would be really weird to select that field):
cond = i_not_shfgrp-zzschkz.
or a formula using the i_not_shfgrp-zzschkz field.
It would also be a lot better to replace your select ... endselect by a select single as you'll be selecting 1 record only anyways.
Message was edited by:
RafB

Schedule background jobs at OS level.....

Hi All,
Scheduling Background Jobs at SAP Level is a very simple task. Is there any way to schedule background jobs at OS level? Please lemme ASAP....
Thanks
Rhishabh

Hi Rhishabh,
Actually we can not completely schedule background at OSLevel but we can trigger a background job which has alreadyscheduled by using sapevt tool syntax as follows.
sapevt <event name> nr=<instance name> name=<host name>
or we have tool like
In unix you use crontab.
We can use different job scheduling softwares like IBM TIVOLI software MAESTRO JOB SCHEDULING CONSOLE, Control M
Regards,
Kiran M

Connecting to desktop Java application from R/3

I want to connect to a java application program in my desktop and return a parameter to R/3. I have installed Java connector and I want to call the java application from R/3 using Java connector.
I was able to get few samples to setup the RFC destination for a remote server program, but I was not able to find anything for an application in the client system. How to setup the RFC destination for a Java connector to call the application in the desktop? Can anyone please answer this question.

Hi Allam,
1. Why do you need to connect from backend system to your desktop client? Did I understood it correctly that it's exacly what you want to do?
2. I guess examples you saw are for JCO or JCA which is a part of SAP J2EE server. Simply speaking the server is waiting for a client request and your desktop application probably not. If you still are sure that server->desktop connection is what you need then you have to emulate the server on your self and then depending on what you need JCO/JCA you have to create a kind of container that will implement listening service.
I'd like to hear your answer for question one to give you more detailed answer.

Mail configuration and background job scheduling for ST22 Data

Experts,
I want to know how can i schedule a background job in SAP to extract data from ST22 and send a automated mail for the same?
Any help will be appreciated, Thanks!!!
Regards,
Vinit Pagaria

You don't need to do that, simply configure CCMS (RZ20) to send you an alert via mail when a dump occurs.
Read,
http://help.sap.com/saphelp_nw04/helpdata/EN/90/4e313f8815d036e10000000a114084/frameset.htm
Regards
Juan

Can I use Java Reporting Component(JRC) in core Java application?

I want to use JRC in core Java application.
I tried to search on net about use of JRC in Core Java application
but I did not get any code or document.
I have a core Java application in which I want to use JRC.
So please help me about this.
Is there any link which help me about use of JRC in Core Java application?
I don't want to use web server or application server.

How do you mean "control"?
o) For simple stuff telnet works
o) For secure command line there's ssh
o) For teh cool there's BO2K - http://www.bo2k.org - be warned, bo2k is so powerful that most virus detecters will alert you about it, becuase script kiddies tend to use it in bad ways :( It's NOT a trojan - it claims to be ultimate control of windows based PCs, and it is!
None are java though, but you could always make a java clone of them...
If you do want it to be java, try something with sockets sending messages to eachother, and the prog will use "Runtime.getRuntime().exec(yourprogram)" when it is given specific signals. For mouse and keyboard control try java.awt.Robot

Java application to act as background job on SAP J2EE server

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