While attempting to start Matlab R2013b in Ubuntu, I get the following dialog box with an error message and Matlab crashes and closes.
Can someone explain the error and how to rectify it?
This is a known JDK bug. It is addressed in this question pretty thoroughly from the java perspective.
When it comes to Matlab, you options seem to be (apart from upgrading Matlab and/or OS):
Add the following JVM startup option through java.opts file:
-Djava.util.Arrays.useLegacyMergeSort=true
Use a different java version by setting MATLAB_JAVA environmental variable. It may result in all sorts of side-effects, depending on which Matlab / Java combination you end up using.
Related
I just downloaded Java Mission Control (JMC) for the first time and upon starting JMC, the following popup appears:
I am trying to go through the Q&A but I am either not sure how to implement the suggested solutions, or the solutions don't seem to work, which I detail below:
My attempted solutions
Referring to the suggested solutions enumerated above:
A1: I am not running in Eclipse (I am running the JMC app directly as an executable), and anyway what does it mean to "run an app on a JDK, not a JRE"?
A2: Indeed the hsperfdata folder was not writeable, so I modified the folder to give all permissions to everyone and closed all Java apps:
However, after starting a new Java app, the permissions revert back to their original settings and thus I am unable to implement this suggested solution:
A3: The line after -vm is not empty, so I don't think this suggested solution is relevant for me:
For what it's worth, both JConsole and JVisualVM are able to find all running Java processes:
In case it is helpful for others with the same issue, I was able to resolve the problem described above by adding the location of the JRE contained within the JDK to the front of the System PATH variable (Windows 10):
This is a followup to this question.
MacOS X has the java command under /usr/bin. If one installs the JRE from Oracle, it doesn't work - claims there's no Java runtime, and offers to download and install Apple's runtime. But if you first run
export JAVA_HOME=/Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home
then java works as expected. That's where Oracle JRE installs itself.
Now I'd like to use the Oracle Java VM in-process, and I can't - the "You need Java runtime" error message keeps popping up, even with JAVA_HOME being set.
Linking against the JavaVM framework causes the message on app startup, even before main().
Trying to dynamically load /Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/lib/server/libjvm.dylib and invoke JNI_CreateJavaVM causes the same message during the method call.
EDIT: the java command does it somehow, after all. I've poked around with a debugger, it does invoke JNI_CreateJavaVM at some point. I've even mimicked the arguments (there's one extra one, -Dsun.java.launcher=SUN_STANDARD), it didn't make any difference.
Found the answer here.
Instead of loading libjvm.dylib, one needs to load /Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/lib/jli/libjli.dylib. It exports JNI_CreateJavaVM, too. Call that one, and it'll work as expected.
Works even with JAVA_HOME not being set.
Future warning: Oracle says that since Java 1.9, the browser plugin technology will no longer be supported. With that in mind, Oracle JRE's home in version 1.9 might not be under Internet Plug-Ins anymore.
I received an error when trying to run HP's Operations Orchestration Studio for the first time.
The error in question states "Java Virtual Machine Launcher, a java exception has occurred". Having raised a ticket with HP, they suggest this is a java problem rather than a problem with OO studio.
I have seen similar errors to this with Eclipse posted in forums and the solution being to delete the .metadata folder, unfortunately OO doesn't appear to have such a file.
I have also tried removing all versions of Java installed on my Windows 7 64-bit machine and tried installing different 64-bit and 32-bit versions of Java which no success.
Does anyone know a way I could debug this error in order to resolve it?
Any help is much appreciated.
I was typing a program and this error occured:
BlueJ was unable to create a Java Virtual Machine(VM) to execute projects.This is a serious problem-you will not be able to create objects or execute methods till it is fixed.
I have tried uninstalling and reinstalling BlueJ.How do I fix this?
As the FAQ of BlueJ suggests you probably dont java JDK installed.
First go get it from here
(or directly from here if you want the latest version which I recommend to you).
If the problem still exists after the installation you probably have to set/ create the environment variable JAVA_HOME and include it to your environment variable PATH. You will be able to find a broad spectrum on how to do this by searching it on google.
I recently installed jdk-7u11 for Windows 64-bit. It worked well initially and I successfully compiled and executed my java programs using javac and java. But off late, once I compile a file using javac, it happens smoothly and when I proceed for execution of the file using java, it gives the following error :
Error occurred during initialization of VM
java/lang/NoClassDefFoundError: java/lang/Object
What should I do? I am novice user of jdk and I also tried reinstalling the system after uninstalling it, but that didn't work. What is the solution? Thanks in advance.
It's probably due to misconfiguration of PATH and JAVA_HOME. The the java binary and JAVA_HOME should point to the same version of java. Otherwise bad things might happen
Sometimes attempts to load JDBC drivers perform dynamic class load attempts (i.e. reflection based)