I have a java program that spawns multiple child threads. Inside the child threads i make a native function call to get the process id of the current thread(process in linux) but this return the process id of the main program that spawned the child threads, though the top command shows ...

If an object is softly reachable and it has not yet exceeded the time limit specified by the -XX:SoftRefLRUPolicyMSPerMB parameter, will it still be garbage collected before an OutOfMemoryError occurs?In other words, if I set -XX:SoftRefLRUPolicyMSPerMB to a very large number (what is the ...

I'm having trouble passing doubles between java and c. I have the following java and c functions.public static native void test( double a, int b, int c );JNIEXPORT void JNICALL Java_TestAlign_test (JNIEnv *env,jclass me,jdouble a,jint b,jint c ) {printf("got: %f %i %i\n",a,b,c);}When i run the ...

Hi thereWhen executing an console application, the portuguese characters does not appears correctly. Is there any way to configure JVM code page or anything like that ?Thanks .PS: using windows xp

## An unexpected error has been detected by HotSpot Virtual Machine:## EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x74346183, pid=3252, tid=2956## Java VM: Java HotSpot(TM) Client VM (1.5.0_07-b03 mixed mode, sharing)# Problematic frame:# C [ODBC32.dll+0x26183]## An error report file with ...

I have 2 methods I expose in my C++ DLL to my VB app:1. init_JVM( ) which I want to return a JNIEnv reference. This method is called once from my VB app.2. convert_Image( ) which passes the JNIEnv object as a parameter back to the C++ DLL. This method is called many times from VB.So, ...

The JVM (Java 1.5) is crashing when I am editing code using Netbeans 5 (it also happens running Netbeans 4.1 with the Java 5 sdk) I am getting a Hot Spot error as shown in part in the log below. I am running Windows XP Pro SPK2. Once the JVM crashes and I restart Netbeans, it crashes more and ...

Hi,Lets say I have a jobject which I know is a java.lang.String object and sometimessome other type of object. I wantto invoke jmethod for the "equals" method of java.lang.String when itsa String and the correct "equals" method when its not a String.I can query env->GetObjectClass(), and ...

Running an app with a JVMTI agent, I cannot specify a max heap greater than 320Mb, even on a 1Gb machine with hardly anything running. Specifying for example -Xms256m -Xmx512m results in following error:Error occurred during initialization of VMCould not reserve enough space for object ...

I want to use a java method to call an C++ method, and in that C++ method another java method is called. Then i use two types of JNI together and found this problem.If i use the java method to call the C++ method, or use the C++ method to call the other java method , it is alright.--This is a ...

I want to use a java method to call an C++ method, and in that C++ method another java method is called. Then i use two types of JNI together and found this problem.If i use the java method to call the C++ method, or use the C++ method to call the other java method , it is alright.--This is a ...

I want to use a java method to call an C++ method, and in that C++ method another java method is called. Then i use two types of JNI together and found this problem.If i use the java method to call the C++ method, or use the C++ method to call the other java method , it is alright.--This is a ...

hello,I want to see how JVM implements immutable string which , unlike c, is not terminated by a null character. so while calculating length of a string ,how does jvm know that the end of string has reached when it does not have any marker to indicate end of the string.please reply with ur ...

Iam trying to open a site through IE browser and the browser doesnt display some of hte page components like button and links .( But it shows the other components) . Also it prompts to locate "JVM1.TMP" file and i cannot find that file in my system.Can anyone tell me for what purpose is ...

I have native C function (Example bellow) which as the parametr I give 'char* buffer' variable. To this buffer is placed received data and is returned length of received data (without any reallocation of memory).Please, how can I do the same using JNI? Is it possible? I mean something ...

Find out who is accessing my machine

heyas!Is it possible to find a loaded applet from JNI?I have a brower that displays an applet. What I need it to do is from his browser code to find the applet class or top level windows in the applet.For some reason I can only find a single 0x0 invisible Frame when I call ...

Hi...I created a small program that uses a JNI call. It works fine, but it requires the absolute path to the library Im using (I get this error when I try to use a relative path: Exception in thread "main" java.lang.UnsatisfiedLinkError: Expecting an absolute path of the library: ...

Hi, I have some legacy code, that I need to capture the stdout (printf and cout, etc). Is there any way in Java to capture them?I tried to use System.setOut(new PrintStream(new BufferedOutputStream(new FileOutputStream("output.dat")))); but it wouldn't catch them. Is there any way to do this? ...

hi everyone, i'm using JNI and i'm trying to call a Java method from C++, this is the code:SocketC.javapublic class SocketC {private native void conectaServidor();private void recibeBuffer(){System.out.println("HELLO!!!");}public static void main(String args[]){SocketC SC = new ...

hi can any one help me how to know that our system is connected to intenet and also how to get spped of the intenet connectionI am anil send me mail to anilnaidu_sri@yahoo.co.inbyeBy Anil

I wrote a benchmark to test the server VM capacity to inline code.It works well and comparing to the client VM it's possible in my case to achieve great performance enhancement.BUT there is something strange : during the first loop, performances are not good, then VM does its optimization ...

I've been logging some GC information of my webapp since it's having some memory issues.The webapplication uses sessions to store a lot of data across pages, it's a medium-high load service used in our company internally as an interface for our ERP.I've noticed that memory usage goes up a ...

Anyone know a solution to this problem?seems the problem file is msvrct.. thanks guys!## An unexpected error has been detected by HotSpot Virtual Machine:## EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x77c47fd4, pid=768, tid=3320## Java VM: Java HotSpot(TM) Client VM (1.5.0_06-b05 mixed ...

Hi, I have three libraries A.dll, B.dll and C.dll, under directory LibA is dependent on B and C. B and C are also dependent on A. If I put Lib in system path and load A only, using System.loadLibrary(A), it works fine, windows somehow knows where to find B and C and load them automatically. ...

My Java class, if ran in the command line, displays some text with System.out.println. But when I invoke that class from C++ using JNI, that string is nowhere to be found. Can someone help me on how to get that output into my C++?The java class is invoked in my C++ as ...

Has anyone seen this? The dll in question is usually ntdll.dll or awt.dll.Thank you in advance.## An unexpected error has been detected by HotSpot Virtual Machine:## EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x7c9010f3, pid=3856, tid=5344## Java VM: Java HotSpot(TM) Client VM (1.5.0_07-b03 ...

Im using Windows XP and it has Java HotSpot Virtual Machine log files (err_pidXXXX.log) being automatically stored onto my desktop.Im not interested in these error messages only in either disabling these log files from being created or at the very least moving them to a more appropriate ...

Cross posting from http://forum.java.sun.com/thread.jspa?threadID=756193I am using jdk 1.4.2.07 and run into the following error with the VM crashing with a defunct process:"Fatal: Stack size too small. Use 'java -Xss' to increase default stack size." on Linux. Does this imply a JVM bug given ...

Hi,Can I use JNI for Java - Fortran interoperation?Do you know other approaches?

Hello,I am trying to wrap some legacy C++ libraries using JNI. I thought I would try to mimic the C++ class structure in java to keep things simple. However, I have discovered what appears to be a bug in how inner class native functions are resolved.if I have something like:package pkg;public ...

hello again everyone, i'm still with the proyect in JNI...now in the callback method i want to return a jstring (or at least a char*), i'm doing this, and i don't know if i'm right....in my Server_TCP.cpp:JNIEXPORT void JNICALL Java_SocketC_conectaServidor(JNIEnv *env, jobject obj)//void ...

Hi ,I Migrated an application from Weblogic 6.1 to Weblogic 8.1. It is deployed properly and I am able to start the server. When I try to open login page it gives the following error as shown below:I tried many ways changing the memory settings, etc. but still i get the same error. It might be ...

Hi,Could someone from Sun tell me whether JNI invocation API for the 1.5.0_07 Windows JVM supports .NET clients compiled with Visual C++ 8?I have an ASP.NET application that calls into the JVM through the JNI invocation API. I know that there were problems with VC7 clients calling into the 1.3 ...

i ALL,Its works fine with netscape but with mozilla 1.4 I'm gettingjava.lang.ClassNotFoundException : test.classat sun.applet.AppletClassLoader.findClass(Unknown Source)at java.lang.ClassLoader.loadClass(Unknown Source)at sun.applet.AppletClassLoader.loadClass(Unknown Source)at ...

Hello,After 6 years programming and leading Java developper teams...I think major problem remaing in the JVM is...the garbage collector.It's not a problem of implementation, but just a bad strategy !We think in our team that we can seriously improve the global performance of our applications, ...

I have a Java application written and I am trying to read functions from a DLL that is written in Modula-2. I know that the Java Native interface can access DLLs with the System.load() call and I have seen multiple examples of how to define functions from the DLL in the Java code. My question ...

Hi there,I try to interface Matlab code with a JAVA graphical interface ... so I created first my matlab library and then created an other one with c++/matlab I can call from JAVA with JNI ;)everything work well but ... here is my problem:When I initialize my matlab library, the GUI just go ...

My group is trying to compile Java 1.5 from source on RedHat 7.3, following directions from someone who managed to successfully compile it. (Previous attempts to compile it on Advanced Server 2.1 have so far not borne fruit.) We're getting the following error, but can't track down what might ...

I have a Windows service that calls a C++ DLL which invokes a Java class through JNI. With this configuration (running as a service), AttachCurrentThread crashes. But, if I run the app as a standalone client, everything is well.Is there anything about services that makes attaching the current ...

We're running jdk 1.5 update 7 on a SuSE Linux 8 machine (kernel 2.4.21-309-smp). It's a pretty large JBoss application server (4.0.3) running an embedded tomcat (5.5) and Systinet web services server (6.5).We've started running out of memory (java.lang.OutOfMemoryError: Java heap space) on ...

Hi all, I am new to using JNI, was wondering if this is possible and how I might be able to do this. I'm trying to call some set/get functions defined in a class that is not part of the class where I have my native code defined and called... Let me explain a bit, I have a class JobElement ...

I am a graduate student looking into alternative synchronization implementations for the Hotspot JVM. I am perusing the source code for Java 1.4, in particular for Solaris and the SPARC ISA. Thus far I have found the following files that deal with locking and ...

I use jdk 1.5.0_07 on Fedora, together with jace 1.1.rc1_05, compiled with gcc 3.4.4 The C++ main loads JVM, and runs a method which calls a native method implemented back in C++. When the native method converts jstring to std::string (using autoproxy-generated code), the program crashes. ...

Hi @all,I've built and linked the C++ code, that's called via JNI by my Java application as a so (shared lib). This lib however, links with other libs, that are not shared but static. When I run my java application it can't resolve symbols from those libs.What can I do to make my Java ...

Is there a way to get real time timestamps in the gc log as opposed to elapsed time. I've seen this kind of question here before, but haven't seen a definitive answer.I've seen this arg referenced in a few places, but no one says what it does:-XX:GCTaskTimeStampEntries=<value>uintxNot ...

I go through this every year or so - why is it so hard to find out what the maximum memory that can be used for each JRE?My very simple question is "what is the maximum amount of memory that my application can use?"Ideally someone has found this elusive table that would at least report the ...

Hi,I have developed a Fortran dll, created with Salford FTN95 for .Net 2003. I call this dll from unmaneged Visual C++ code (exe) and I have no problems with both implicit (load time dynamic linking) and explicit (runtime) linking. The problems arose when a tried to call the above C++ code (but ...

The thread, "Thread-6", is blocked waiting to lock <0x650efdf0>. The thread, "QueueRequestScheduled", holds this lock and itself is blocked "waiting on condition". However there is no indication what this condition is. The "QueueRequestScheduled" thread is wedged in this state forever at ...

Hi @all,I am using the Invocation Interface to Start an JVM from a C Progam. The Java Programm is only an User Interface to get some Input. The Input the User made is gievn through the a Java class to the C Program. I save the Input in A static int. This Static is read by the C program when the ...