Transaction Exception

[Kevin Burns]

Hello,

Very recently, I have been receving this after execution:

Exeption in thread "Thread-1" org.deuce.transaction.TransactionException: Failed to commit the transaction in the defined retries.

I have attached a simple case where one thread tries to increment a counter 10 times. There is no contention and yet, I receive this error. As my build.sh file indicates, I am using the online instrumentation... could this be the reason why I didn't used to get this error?

I have also tried the offline implementation but when I enter this command:

java -jar deuceAgent.jar Test.jar out.jar //where Test.jar was created from the code in the attached zip.

I get this:

Nov 30, 2012 9:47:28 AM org.deuce.transform.asm.Agent transformJar
INFO: Start translating source:Test.jar target:out.jar
Nov 30, 2012 9:47:28 AM org.deuce.transform.asm.Agent transformJa
rSEVERE: Failed to translate test/Local_Counter.classjava.lang.ArrayIndexOutOfBoundsException: 37476
 at org.deuce.objectweb.asm.ClassReader.<init>(ClassReader.java:174)  
 at org.deuce.objectweb.asm.ClassReader.<init>(ClassReader.java:153)   
 at org.deuce.transform.asm.FramesCodeVisitor.visit(FramesCodeVisitor.java:39)   
 at org.deuce.transform.asm.Agent.addFrames(Agent.java:114)   
 at org.deuce.transform.asm.Agent.transform(Agent.java:70)   
 at org.deuce.transform.asm.Agent.transformJar(Agent.java:179)   
 at org.deuce.transform.asm.Agent.main(Agent.java:139)
Nov 30, 2012 9:47:28 AM org.deuce.transform.asm.Agent transformJarINFO: Closing source:Test.jar target:out.jar

I do not understand why the retries error would come about recently (it used to work perfectly fine). I have swapped out the compiled dueceAgent.jar (feshly pulled from github) with the .jar found on the Downloads page and it worked flawlessly.

Thank you for your time,
-Kevin

[Guy Korland]

I'm not sure I follow, do you say that the code on GitHub doesn't have this bug?

[Kevin Burns]

I cloned the git repo and compiled the deuceAgent.jar. This results in the bug. If I download the deuceAgent-1.3.0.jar from the download page, it do not receive the bug.

[Kevin Burns]

There seems to be a difference in the way I compile the deuceAgent.jar and the deuceAgent-1.3.0.jar (from the downloads page) is compiled. I decompress the jars and open the contents in diff. Diff shows numerous of file differences and a lot of files that exist in one jar doesn't exist in the other and vis versa.

Are there any settings or arguments I am supposed to set before running ant. Is there some documentation on the build process.

Thanks,
-Kevn

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[Guy Korland]

The default target on the Ant should do the job.

--
Regards,
Guy Korland

[Kevin Burns]

Is there any documentation on how to write my own instrumented code? without using the @Atomic annotation.

[Guy Korland]

Check the code, the inline doc explains the different steps.

[Kevin Burns]

I have narrowed down the scope of the problem a little bit. When I use the downloaded dueceAgent-1.3.0.jar build from the website, everything works fine. However, when I build  the sources of the lastest version on github, I get:

Exception in thread "Thread-1" org.deuce.transaction.TransactionException: Failed to commit the transaction in the defined retries.

This was generated while using my simple counter test posted in the first message. However, I have now tried a linked list implementation and it works perfectly on both versions of the jars (from source and downloaded jar). I suspected that this indicated a difference in implementation... I have scanned the bytecode outputs for both tests and found no differences. Hunting through the two different jar's byte code is like hunting a needle in a hay stack, so any suggestions to narrowing this search would be greatly appreciated.

My questions are,

Which commit version in the git repository matches up with the deuceAgent-1.3.0.jar from the download page?

Are there any environmental dependencies (other than jdk version >= 1.6)?

Thanks!
-Kevin

[Guy Korland]

I'm not sure which commit matches to 1.3 since it was while ago and I moved the code from SVN to Git.

But it seems like it should be around this commit July 2nd 2010.

https://github.com/DeuceSTM/DeuceSTM/commit/334e83aed0af42ca0d311eebc04f788d0884df3c

There're no other dependencies that I know of, the only dependency is on ASM but it's part of the source code.

Guy

[Kevin Burns]

Thanks! That worked! If I had to guess, the problem lies somewhere in the new commit() function. I will debug this later and will try to inform you which git commit breaks my simple counter.

[Guy Korland]

Thanks!

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Regards,
Guy Korland