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Questions tagged [j9]

IBM's J9 Java Virtual Machine

IBM's J9 Java virtual machine which powers the IBM Java SDK.

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Ibm j9 java.util.Executors ClassNotFound

I am developing an application using IBM j9 JDK. When I try to use the following line of code: ExecutorService es = Executors.newSingleThreadExecutor(); I get a runtime exception saying NoClassDefFoundError for java.util.Executors Is there a…
Hans Landa
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how can i use encryption algorithm from installed provider on J9 vm?

Hi I am trying to user RSA on J9. The algorithm is offered by the 'J9JCE' provider which is an installed extension(i listed all the existing providers and algorithms and found them) but the exception i get is: Exception in thread "main"…
calin
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Core dump generated by J9 VM on linux shows/contains only one thread

What is the reason for the core dump generated by J9 VM on linux platform, it just shows/contains only one thread (i.e current thread)? Note: It is complete core dump(not truncated). (gdb) info threads * 1 Thread 0x7f33544d9700 (LWP 6471) …
Mohan Raj
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Does any one Know of any Tools to monitor GC on a transaction application on IBM's J9 VM?

I have been tasked to tune the GC on an application, and I am looking for a tool that will help me monitor the GC in depth, what collection is happening, how often, how it is affecting run time. Any one know of any good tools fo J9 VM?
Mario Parada
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ant xmlbean task behavior differs from Oracle HotSpot to IBM J9

I have ant xmlbean task that works fine under HotSpot 1.8 but fails under IBM J9 with exception IO Error java.nio.charset.UnmappableCharacterException: Input length = 1 How may I fix that? Here is my ant task:
Andrew
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CDC finger-friendly

I've been working in a Java mobile project using j9 as a virtual machine. So far the project has been developed for an stylus interaction using AWT components. We want to create a new version of the application more finger-friendly the internal…
4NDR01D3
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IBM J9 spec will not allow file creation access from non bootstrapped classes

I am using a J9 spec (wm50-arm-midp20_6.1.2.2) for a java application that runs on windows mobile and have run into a snag with needing to create files. I get a security exception from this line in the J9 constructor for…
nemisis enforcer
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How do I create an alphablending BufferedImage using J2ME (CDC/PP 1.1)

I have a BufferedImage created using new BufferedImage(wid,hgt,BufferedImage.TYPE_INT_ARGB); to which I assemble a wallpaper using multiple other images. It works fine in Jave SE, but when I tried to run the code on a J9 CDC/PP platform I…
Lawrence Dol
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is the environment variable IBM_HEAPDUMP enabled by default in IBM J9 JVM?

i wonder if the environment variable IBM_HEAPDUMP enabled by default in IBM J9? I searched through the internet and somebody say it is while other say not. Let me suppose if it's active by default, that means, the signal-based heapdump has been…
wing2ofsky
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