Byte Code Instrumentation with -javaagent in JCAPS 5.1

Hello All,
Has anyone successfully used Byte Code Instrumentation using the -javaagent switch in JCAPS 5.1?
I have 3 instances of JCAPS and two are reporting metrics fine the third is Not!
I am trying to instrument but my agent code is not being started and I am not seeing metrics...

Tags in JCAPS Repository are primarily used with deployment profiles. They are not the traditional CVS or SVN Tags. As far as I know, you cannot export projects based on Tags. The only place they are useful is when you are creating deployment profiles and want to use an older Tagged version of the connectivity maps etc and the components used within them such as JCDs, eWays, BPs etc. The caveat here is that if you used any external JARs within your JCDs, earlier versions of those would not be references corresponding to the repository Tag.
Hope that helps.
Z.

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Why UnsupportedOperationException after byte code instrumentation using ASM

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I am getting an run time exception while trying to profile java class after byte code instrumenation using ASM 3.0.
Error is like :
java.lang.UnsupportedOperationException: This parser does not support specification "null" version "null"
at javax.xml.parsers.SAXParser.getSchema(Unknown Source)
I am trying to add byte code like this. ( I am trying to use a PrintWriter object of my class (Report) to write a Separator ( / ) in a text file and using AdviceAdaptor of ASM 3.0 )
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Please help me to resolve this issue.
write me if you need more information on this.

Dont someone has a solution, or got a similar problem ?
Thought about it could be a bug in the basic java classes of JDev 10.1.2
but i dont really know...
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Sebastian

Dynamic code instrumentation with AspectJ...is it possible ?

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Im trying to build a GUI that will allow me to instrument an application using aspectJ. What i would like to ideally do is to upload a .java file and an associated aspect and to be able to run this in my GUI, observing the results..
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Anyone ?
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Edited by: barron121 on Jun 25, 2008 6:28 PM

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Will 1.3 code compiled with 1.4 run on JVM/JRE 1.3?

Will byte code created with j2se 1.4.2 only run on JRE 1.4.2 and forthcoming versions even if my java source code only contains classes that were available already in version 1.3?
If so, is it a good idea to install and use the earliest version of java compiler that will digest my code in order to create an applet that is accessible to more users without downloading the latest JRE/JVM?
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Connecting to EMS fails with No mapping for the Unicode character exists in the target multi-byte code page

I am getting the following error when trying to connect to both my exchange servers.
New-PSSession : [ex2013-002.nafa.ca] Connecting to remote server ex2013-002.nafa.ca failed with the following error
message : No mapping for the Unicode character exists in the target multi-byte code page. For more information, see
the about_Remote_Troubleshooting Help topic.
At line:1 char:12
+ $Session = New-PSSession -ConfigurationName Microsoft.Exchange -ConnectionUri ht ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : OpenError: (System.Manageme....RemoteRunspace:RemoteRunspace) [New-PSSession], PSRemotin
gTransportException
+ FullyQualifiedErrorId : 1113,PSSessionOpenFailed
EMS used to connect ok. I am not sure if there is any connection but Outlook was installed recently on the exchange server to enable mailbox level backups.
Any help would be appreciated.
Steve Hurst

Hello Steve,
Firstly, you cannot install Outlook with Exchange because they share certain dll files.
About the EMS question, I suggest we try rebuilding the powershell virtual directory. If it still does not work, check the application log for more referernce.
Thanks,
Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you have feedback for TechNet Subscriber Support, contact
[email protected]
Simon Wu
TechNet Community Support

Executing tiny programming language compiled byte code with the JVM

Hello,
For a project, I am developing a simple programming language, with a syntax not unlike Pascal, which compiles to Java Byte Code. Currently I execute the compiled byte code using my own interpreter. This works OK, but what I'd like to do now is to execute the compiled byte code using the actual existing JVM. The compiled byte code resides in a text file upon compilation of a sample program written in my tiny programming language. Does anyone know how I may start to go about this? Thanks in advance.
adam

The only way of getting a standard Java virtual machine to execute your java byte code, is to wrap it up into a completely valid java class file.
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Something like ASM, would let you dynamically create a Java class file.
http://asm.objectweb.org/
regards,
Owen

Managed system Configuration : The JMX metrics of this Host / Byte Code Adapter are missing

Hi Friends
While Configuring EP system with SOLMAN 7.1 SP12 it is giving below message in self Diagnosis Phase.
1. Solman system is already having ISAGENT version 8 and 9 installed (but Managed system is having 8)
2. I have followed the automatic Process as below
==========================================
Automated Installation of the Introscope Agent via SMD
The Solution Manager provides an application that performs the setup of the Introscope
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Before you can run the Introscope agent setup, the setup wizard for the managed system
must have been executed.
1.
2.
3.
4. Launch the Introscope Setup application: SAP Solution Manager Configuration 
Managed Systems Configuration  Step 7 Configure Automatically  Automatic
Activity “Byte Code Adapter Installation”  “Open Java URL” (only available in edit
mode). Your screen will look similar to the image below:
5. Check the Enterprise Manager Settings at the top of the screen. These are the
connection parameters that will be used by the agent to connect to the Enterprise
Manager.
6. In the pane Introscope Agent Setttings, select the system that you want to instrument
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the current status of the agent setup.
7. To initially setup or update the agents, click Setup Introscope Agent …. This will open
the setup dialog as shown below. Select the desired agent version (by default only one
available) and choose the profile. Next, check the desired instrumentation areas, and,
in the case of AIX, review the AIX settings to match your environment (J9 or classic
mode).
8. Finally, hit Apply to perform the necessary changes in the agent configuration. Agent
config files will be adapted and the Java VM parameters will be set as required for the
managed system.
================================================================
3. Restarted SAP but error still present.
Please help to resolve the issue.
Thanks

Found the solution :
1819577 - Workload Analysis data missing for Java systems when using ISAGENT 8.2.4.0
Cause
l This issue has been identified as product defect and documented in note 1273028
Resolution
l As mentioned in note 1273028, update to ISAGENT 8.2.4 Patch 1 timestamp: 2012-06-26, please proceed as described below)
1. Enable the Maintenance Mode in the Agent Administration UI (http://solmanserver:port/smd/AgentAdmin)
2. Deploy the file to the Solution Manager JAVA stack using the Software Deployment Manager (SDM)
3. Disable the Maintenance Mode in the Agent Administration
4. Execute again the activity 'Byte Code Adapter Installation' of the step 'Configure Automatically' in the 'Managed System Configuration' for the
affected systems. This activity will deploy the new version of the
Introscope JAVA agent in the managed system servers and reconfigure the JVM parameters to use the new version of Introscope JAVA
Agent;
5. Check from Introscope Agent Admin if "IS Agent State" contains value "Running but needs restart"
6. Restart the affected managed system(s)
Finally Solution is update your SOLMAN system patch ISAGENT 8.2.4.0 from patch 0 to 1 via SDM.
Thanks
Mukesh

Questions about byte code

1.How can a java program mutate and kill itself after running a certain times?
i think the argorithm is to modify the byte code, but i don't know the structure of the byte code.
for example:
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victim.seek(i);
int changed_byte=(int)victim.readUnsignedByte()+1;
victim.seek(i);
victim.writeByte(changed_byte);"
how can i know that 1156 is the place that count the running times of the program. please help me and give the relevent pages to read, many thanks!

In Mustang, the java.lang.instrument API has been extended to allow not only redefinition of classes, but also retransformation (without / with original bytes, respectively), so you could hook up a Java agent to transform classes at will. You could use this with 5.0, but you can't get the actual bytes for the current class from the JVM when retransforming classes. See http://java.sun.com/j2se/1.5.0/docs/api/java/lang/instrument/package-summary.html#package_description and http://download.java.net/jdk6/docs/api/java/lang/instrument/package-summary.html#package_description for more on instrumentation in 5.0 and (provisionally) 6.0.
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However, I would question your motivation here, particularly since you're using names like 'victim' and 'attacker'. You will struggle to do any of this is the user really doesn't want you to, since the platform is designed pretty well against it.

HTTP_RESP_STATUS_CODE_NOT_OK HTTP response contains status code 500 with th

hello friend,
I have developed a proxy to JDBC synchronous scenario.
My scenario works like this.
i run an abap program which calls a client proxy,
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when i run the report for the first time, it gives me an exception while calling proxy
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kannu.

1. Increase the proctimeout in smicm as per note - 824554
2.   Application threads in the J2EE engine might have got consumed in high load situations.
Increase the count of application threads in config tool at location Config Tool -> cluster-data ->
<configuration template> -> <instance-ID> -> managers -> ApplicationThreadManager ->
MaxThreadCount
3.    Increase the parameter ServletInputStreamTimeout from 180000 to 1728000000.
Steps for setting this parameter:
a.   If you have configured ICM to forward requests to the J2EE dispatcher then apply Note
1048692. If the problem is not resolved, then apply section b.
b.   The request bytes are reaching the Engine too slowly
i.    Start the configtool in <J2EE>/configtool directory
ii.    Browse the tree in the left pane
cluster-data -> Global server configuration -> services -> http
iii.    Press the ServletInputStreamTimeout key in the keylist on the right
iv.    Change the value of the "Value" field at the bottom of the right pane to the
preferred one (in milliseconds).
-1 means there is no timeout - that is unless the full request comes into a single
chunk, an error will be thrown
180000 means the Engine would wait for 3 minutes for any byte to be entered in
the stream.
1728000000 means the Engine would wait for 20 days for any byte to be entered
in the stream
v.    Press the "Set" button in the top-right corner
vi.    Select from the menu File -> Apply and confirm all popups.
vii.    Restart the Engine for changes to take effect

No mapping for the Unicode character exists in the target multi-byte code page

hi,
i have an issue with sharepoint 2013 and IE 10.
im using the sharepoint rest web service and make an ajax data call to retrive data from sharepoint lists, the call fail and return a server error: "No mapping for the Unicode character exists in the target multi-byte code page".
i have to say that everything works fine with chrome and firefox.
what can i do for fixing it?
Thanks a lot
alon

Hi,
From your description, I know you get an issue with IE 10 in SharePoint 2013 when you use SharePoint REST API to retrieve data from SharePoint list.
I am not quite sure what cause your issue. Could you provide your code, so I could test it in my environment and troubleshoot for you.
In addition, you could test your issue in another computer or another version of IE.
Best Regards
Vincent Han
TechNet Community Support

Question about Byte Code

Hello...can anyone tell me how I write a java program, compile it and get my byte code written into another file??
Thanks in advance!

I am looking to write my bytecode into a .bc file and
open it and actually be able to read the bytecode
instruction...(stuff like iload_2, i2d etc.,)I see... that was not clear from your first question. What you want is a disassembler. The SDK comes with one called 'javap': http://java.sun.com/j2se/1.4.1/docs/tooldocs/windows/javap.html

Question about compiled byte code

Howdy folks,
I have a client who wants to run an application in both
on-line and off-line modes. The user could run the application
locally on their laptop making changes and such which would get
stored to local database files (probably FoxPro free tables just to
make it easier on me). Then when the user got back to their
internet connection they could run the application and it would
sync with the online tables (probably MySql tables at that point).
So the question is, if I compile Cold Fusion code into Java
byte code, will it be able to execute independantly of the Cold
Fusion Server? I realize that I could load ColdFusion on the user's
laptop, but I don't think I want to do that. I'm assuming that the
answer to my question will be "No. You can't do that. Cold Fusion
isn't meant to work like that." To which my next question would be,
"Well, what language would be best for the type of application I
have described above? Action Script, maybe?"
Any thoughts are welcome, especially if you've written an
application like the one I've described.
Thanks very much,
Chris

Well, rats.
I wrote a nice reply to your message BKBK, but lost it
because, apparently, my session timed out.
The basic jist, was that I've been working on AJAX, and have
been implementing some AJAX-like techniques at some other clients
(using hidden iframes combined with innerHTML -- I know not a
standard, but darn handy otherwise), but I couldn't see how that
would solve my on-line/off-line problem (unless I stuck with the
cookies idea).
I also did some reading on cookies last night (obviously, I
don't use cookies very often if at all in my daily coding), and I'm
a bit put off by the different browser limitations. I'd hate my
client to be chugging along, entering appointments into the
"database" (read: data being stored as cookies to be sync'd later
when the user goes online), and then suddenly run into the cookie
limitation. On top of that, if I'm reading right, IE (my client's
most likely choise of browser), will not let you know that you've
reached this limit, but will just begin dropping the older cookies
in favor of the newer ones. If I could programmatically sense this
limitation and then write the cookies to some file before
continuing that'd be geat, but since JavaScript can't write files
(that I know of) this isn't feasable. Also, if I could write a file
like that, I wouldn't bother with the cookies.
I think I'm going to end up writing it in FoxPro since my
company has a bunch of copies of it (and it's licenced per
developer and not per copy), and there are lots of folks in my
company who can help me get up to speed. That also means that I'll
probably need to write a web version of the code for when my
client's client's (does that make sense? :-) ) connect to the app
via the internet.
Anyway, I'm really enjoying everyones comments on the
subject. Can anybody think of a technique for a way around the
cookie limitations? Or perhaps another language that this whole
thing could be written in?
I really wish that I could compile my ColdFusion code for use
independant of the CF server. I know, that's not the way it works
and typically not what scripting languages like this are used for.
I suppose I could always install the developer's version of CF on
the user's local machine, write the code in CF and then just detect
whether or not the user is online and behave accordingly.

Inheritance and byte-code...

My coworker and I were having a discussion today that I imagine someone here will be able to resolve for us: we were talking about how wonderful inheritance is (when used properly, of course), and the issue of the compiled byte-code came up.
Basically, it was my conclusion that a subclass contains only the byte code that differentiates it from the superclass; in other words, if a superclass is modified and recompiled, there is no need to recompile the subclass for the changes to take effect. My coworker disagreed, however, arguing that there would be linking problems between the two classes if the subclass was not recompiled (sign of an old assembly programmer, if you ask me).
Anyone know the answer to this?

I created a trivial Parent class and extended it with an
even more trivial Child class. I compiled both classes
and then made a change to the Parent class. After
compiling the Parent class only, the change took effect
in the Child class. This indicates that you are right and
your co-worker is wrong. Here are the classes if you
would like to show him.
import java.awt.*;
public class Parent
     Dimension d;
     Parent() {
          d = new Dimension(333, 777);
     public Dimension getDimension() { return d; }
import java.awt.*;
public class Child extends Parent
     Dimension d;
     public Child() {
          d = getDimension();
          System.out.println(d.height + " " + d.width);
     public static void main(String[] args) {
          new Child();
}Mark

Is there a way to convert JVM 1.1x byte code to JVM 1.3+ byte code

I dont have the source code from a program that is used in my company. The original writers went out of business... so we cant ask them.
I was thinking of decompiling the code and then recompiling it... but I was wondering if there wasnt just a byte code updater?
Or if anyone could come up with a better method.
-S. Bob.

er.. well I dont think you understand. I have been assigned to get it functional... I mean, its my task to come up with a solution. :[
Unless of course you have a credible documented source that states 'NS 6.1 is a hot steaming pile of crap' and that no one should use it. I could leverage off of that to help my claim that any support for this browser is pointless.
Do you have a link that talks about the applets and why they dont function in NS 6.1 vs 4.7x ?
That or does anyone know why or how to get NS 7.0 working on Windows 95. (yes I do understand what I ask here... I wish it werent true.)
-S. Bob
'life in the corporate wheel, grinding one day at a time'

Strange Error - 5005: Unknown error optimizing byte code.

Hello flashcoders,
I am facing strange problem since long time. This error code
even doesn't exist in the list of error codes.
This is the exact error I am getting while I compile the FLA
from flash CS3.
Location : , Line 1
Description : 5005: Unknown error optimizing byte code.
Source :
I don't know exact reason about its generation, But here are
the some possible reasons / hints:
Case 1) Overloading:
1.1) Size of .fla is 10.5 MB and its document class contains
more than 60 classes to import and has more than 100 variables.
1.2) Even if I put In document class - only variable
initialization and class importing are there. Nothing in its
constructor + no other functions are defined. Still error is there.
1.3) If we import all classes and has all variables then it
gives this compile error. But if we remove some particular numbers
of variable, it's start working. In this we can remove any type of
variables.
1.4) After reducing variables, application starts working
till that it won't.
Case 2)
2.1) Size of .fla is 1.75 MB and its document class is same
as above one.
2.2) All assumptions are same as above.
2.3) Now this class contains all functions and have
initialization of all variables + classes.
2.4) In this If we remove 3-5 variables, it will start
functioning else it won't.
Its a huge application so I am even confused that what is the
cause of error and this error stopped our working for a week now.
Bit more information about the project that may help the team to
identify the reason.
1. Project development started with flash public alpha 3.
When we started using Flash CS3, we had some design problem if we
do open the FLA in CS3, so we completely redesigned the Movieclips
etc., in Flash
CS3 IDE.
2. Project contains approx 250 classes.
3. In main application, it imports 67 classes. (it works if I
keep 63 classes in document class).
4. In the case 3 above, if that works with 63 classes and If
I do add 3 frames in existing movieclip, it stops working.
5. In the case 3 above, if that works with 63 classes and If
I do add / declare few more variables, it stops working.
It would be humble appreciation if someone can come up with
some light in the dark tunnel.
Best Regards,
Ashvin Savani - "arckid"
Founder & CTO - Avinashi.com
Adobe Community Expert
We Never Give Up!

I've posted an article on this problem -
http://www.negush.net/blog/5005-unknown-error-optimizing-byte-code/
- and here are a few ideas on how to handle it (check out the
comments):
- try turning off the optimizer
- delete ASO files
- also it seems that changing the java vm heap memory size
could help (find he environment variables in the Windows computer
properties and search the JAVA_TOOL_OPTIONS variable)

Byte Code Instrumentation with -javaagent in JCAPS 5.1

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