Java Heap Space: out of memory - Java Discussion Boards

Re: JavaFX program exit without Java JDK installed

Richard MacCutchan25-Aug-18 4:35

25-Aug-18 4:35

One thing that might be worth trying in that code is to break it down into its constituent parts. However I cannot find the definition for the getNativeWindow method.

Re: JavaFX program exit without Java JDK installed

Valentinor25-Aug-18 4:55

Valentinor

25-Aug-18 4:55

The thing is, I tried to add the loading of the DLL in a try {} catch(Exception e){} block, and in catch to write in a file the message of that exception, but it doesn't write anything in the file. And I can't try to debug the program in Eclipse, because for that I'll need the JDK installed, and if I have that, then the program will run without a problem.

Re: JavaFX program exit without Java JDK installed

Richard MacCutchan25-Aug-18 6:12

Richard MacCutchan

25-Aug-18 6:12

Sorry, but I cannot reproduce the problem. There must be something else incompatible on the PC where it is failing, but I have no more ideas.

Re: JavaFX program exit without Java JDK installed

Valentinor25-Aug-18 7:24

Valentinor

25-Aug-18 7:24

I managed to find out what the problem was. Using catch Exception wasn't catching the execption, but using what jschell suggested (catch Throwable), I found out that the problem was the DLL files.
With Throwable I was getting dependency exception, so I looked up with "pestudio", and my DLL files, were using debug DLL's that come with Windows SDK not C++ Redistributable.

modified 25-Aug-18 13:31pm.

Re: JavaFX program exit without Java JDK installed

Richard MacCutchan25-Aug-18 8:29

Richard MacCutchan

25-Aug-18 8:29

Strange then that it worked on my alternate system which does not have JDK or C++ debug libraries. Or maybe that was a release version.

Re: JavaFX program exit without Java JDK installed

Valentinor25-Aug-18 8:46

Valentinor

25-Aug-18 8:46

Well, it was even weirder that it was working with JDK when my DLL files needed those debug C++.
And yeah, if you used my DLL files, and not build them using my code, then it shoudn't have worked. Maybe a program that was installed on that system, added them.
In any case, I'm glad I managed to figure it out, it was getting kinda annoying, having it work on a system, and not another. They need to change that option in Visual Studio, after all I used their "Release" mode, but I had to go in project settings too.

Re: JavaFX program exit without Java JDK installed

jschell25-Aug-18 4:50

jschell

25-Aug-18 4:50

The JRE will load JNI without problem.

I strongly suspect that your problem is as follows.
1 - You have inadequate error detection.
2 - You are loading the JNI via a static block. The JNI load fails which causes an exception. That by the way means that the class will also fail to load.

Other possibility is that the JNI code is throwing an exception. JNI code that throws system exceptions will cause the VM to exit.

Because of the exception and perhaps because of the class load failure, your application is getting an uncaught exception which causes the 'main' to exit. That means that the JRE exits.

For JNI

ALWAYS, load the class in a try catch block
ALWAYS, catch 'Throwable' (not Exception, not Runtime)
ALWAYS, log/print the exception stack trace. Not the message - the entire stack trace.
ALWAYS, do the above (catch, log) any method call that goes to a JNI method.

Note that the following loads the class. You should NOT have code like this in your main entry class. DO NOT attempt to load the class this way using another class either.

class MyClass
{
    private MyJNIClass somevar
    ...

Instead use a Interface and have a method and that method does a 'new' for your JNI class.

class MyJNIClass implements MyJNIInterface {...}

interface MyJNIInterface {}

class MyClass
{
    MyJNIInterface var;

    public void setup()
    {
        try
        {
         var = new MyJNIClass();
        }
        catch(Throwable e)
        {
           // Log/print the stack trace
           // Figure out what to do if it fails.
        }
     }

My last recommendation - do not use JNI.
If you want to access some other language
1. Create an executable with an IO Interface. IO interface would be via stdin/out, sockets, files, etc.
2. Create an API in your java app that runs 1, and uses the IO interface to talk to it.

The above solution means that failures in the other code cannot cause your VM to exit. The is NO way to stop this. That is why I recommend the above.

Java Heap Space: out of memory

Member 1395683321-Aug-18 8:04

Member 13956833

21-Aug-18 8:04

When I am running apache servicemix. I am getting this Error

Caused by: java.lang.OutOfMemoryError: Java heap space

. Is there a way to increase the java heap size for opensuse11.

Full Error

<pre>08:04:06,029 | ERROR | ADS.MANUALSTART] | ads                              | 91 - org.apache.camel.camel-core - 2.8.5 | Exchange[
, Id:ID-linux-1q9s-8486-1533729523726-0-3
, ExchangePattern:InOnly
, Properties:{CamelToEndpoint=log://de.mt.esb.ecom.ads?level=ERROR&multiline=true&showBody=false&showBodyType=true&showCaughtException=true&showException=true&showExchangeId=true&showHeaders=true&showProperties=true&showStackTrace=true, CamelBinding=org.apache.camel.component.jms.JmsBinding@1e244b5, CamelCreatedTimestamp=Wed Aug 08 07:59:15 EDT 2018, CamelFailureEndpoint=log://de.mt.esb.ecom.ads?level=INFO&multiline=true&showBody=false&showBodyType=true&showCaughtException=true&showException=true&showExchangeId=true&showHeaders=true&showProperties=true&showStackTrace=true, CamelExceptionCaught=org.apache.camel.CamelExecutionException: Exception occurred during execution on the exchange: Exchange[JmsMessage[JmsMessageID: ID:414d5120514949552e4d512e4d414e414c2e6c5b20060c07]]}
, Headers:{JMS_IBM_PutDate=20180814, JMSDestination=queue:///ECOM.ADS.MANUALSTART, JMS_IBM_PutApplType=28, breadcrumbId=ID:414d5120514949552e4d512e4d414e414c2e6c5b20060c07, JMSCorrelationID=null, JMSXUserID=MUSR_MQADMIN, JMSMessageID=ID:414d5120514949552e4d512e4d414e414c2e6c5b20060c07, JMSXGroupID=null, JMSReplyTo=null, JMS_IBM_MsgType=8, ServiceName=HBBTV, JMSXDeliveryCount=1, JMSRedelivered=false, JMSTimestamp=1533729555402, JMS_IBM_PutTime=21304487, JMSPriority=4, JMS_IBM_Format=MQSTR   , JMSDeliveryMode=2, JMSXAppID=WebSphere MQ Client for Java, JMSExpiration=0, JMSType=null}
, BodyType:String
, CaughtExceptionType:org.apache.camel.CamelExecutionException, CaughtExceptionMessage:Exception occurred during execution on the exchange: Exchange[JmsMessage[JmsMessageID: ID:414d5120514949552e4d512e4d414e414c2e6c5b20060c07]], StackTrace:org.apache.camel.CamelExecutionException: Exception occurred during execution on the exchange: Exchange[JmsMessage[JmsMessageID: ID:414d5120514949552e4d512e4d414e414c2e6c5b20060c07]]
	at org.apache.camel.util.ObjectHelper.wrapCamelExecutionException(ObjectHelper.java:1187)
	at org.apache.camel.impl.DefaultExchange.setException(DefaultExchange.java:287)
	at org.apache.camel.impl.converter.AsyncProcessorTypeConverter$ProcessorToAsyncProcessorBridge.process(AsyncProcessorTypeConverter.java:51)
	at org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:78)
	at org.apache.camel.processor.DelegateAsyncProcessor.processNext(DelegateAsyncProcessor.java:98)
	at org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:89)
	at org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:78)
	at org.apache.camel.processor.DelegateAsyncProcessor.processNext(DelegateAsyncProcessor.java:98)
	at org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:89)
	at org.apache.camel.management.InstrumentationProcessor.process(InstrumentationProcessor.java:69)
	at org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:78)
	at org.apache.camel.processor.DelegateAsyncProcessor.processNext(DelegateAsyncProcessor.java:98)
	at org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:89)
	at org.apache.camel.processor.interceptor.TraceInterceptor.process(TraceInterceptor.java:90)
	at org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:78)
	at org.apache.camel.processor.RedeliveryErrorHandler.processErrorHandler(RedeliveryErrorHandler.java:318)
	at org.apache.camel.processor.RedeliveryErrorHandler.process(RedeliveryErrorHandler.java:209)
	at org.apache.camel.processor.DefaultChannel.process(DefaultChannel.java:306)
	at org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:78)
	at org.apache.camel.processor.Pipeline.process(Pipeline.java:116)
	at org.apache.camel.processor.Pipeline.process(Pipeline.java:79)
	at org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:78)
	at org.apache.camel.processor.DelegateAsyncProcessor.processNext(DelegateAsyncProcessor.java:98)
	at org.apache.camel.processor.ChoiceProcessor.process(ChoiceProcessor.java:80)
	at org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:78)
	at org.apache.camel.processor.DelegateAsyncProcessor.processNext(DelegateAsyncProcessor.java:98)
	at org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:89)
	at org.apache.camel.management.InstrumentationProcessor.process(InstrumentationProcessor.java:69)
	at org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:78)
	at org.apache.camel.processor.DelegateAsyncProcessor.processNext(DelegateAsyncProcessor.java:98)
	at org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:89)
	at org.apache.camel.processor.interceptor.TraceInterceptor.process(TraceInterceptor.java:90)
	at org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:78)
	at org.apache.camel.processor.RedeliveryErrorHandler.processErrorHandler(RedeliveryErrorHandler.java:318)
	at org.apache.camel.processor.RedeliveryErrorHandler.process(RedeliveryErrorHandler.java:209)
	at org.apache.camel.processor.DefaultChannel.process(DefaultChannel.java:306)
	at org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:78)
	at org.apache.camel.processor.Pipeline.process(Pipeline.java:116)
	at org.apache.camel.processor.Pipeline.process(Pipeline.java:79)
	at org.apache.camel.processor.UnitOfWorkProcessor.processAsync(UnitOfWorkProcessor.java:139)
	at org.apache.camel.processor.UnitOfWorkProcessor.process(UnitOfWorkProcessor.java:106)
	at org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:78)
	at org.apache.camel.processor.DelegateAsyncProcessor.processNext(DelegateAsyncProcessor.java:98)
	at org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:89)
	at org.apache.camel.management.InstrumentationProcessor.process(InstrumentationProcessor.java:69)
	at org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:104)
	at org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:85)
	at org.apache.camel.component.jms.EndpointMessageListener.onMessage(EndpointMessageListener.java:91)
	at org.springframework.jms.listener.AbstractMessageListenerContainer.doInvokeListener(AbstractMessageListenerContainer.java:560)
	at org.springframework.jms.listener.AbstractMessageListenerContainer.invokeListener(AbstractMessageListenerContainer.java:498)
	at org.springframework.jms.listener.AbstractMessageListenerContainer.doExecuteListener(AbstractMessageListenerContainer.java:467)
	at org.springframework.jms.listener.AbstractPollingMessageListenerContainer.doReceiveAndExecute(AbstractPollingMessageListenerContainer.java:325)
	at org.springframework.jms.listener.AbstractPollingMessageListenerContainer.receiveAndExecute(AbstractPollingMessageListenerContainer.java:263)
	at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.invokeListener(DefaultMessageListenerContainer.java:1058)
	at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.executeOngoingLoop(DefaultMessageListenerContainer.java:1050)
	at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.run(DefaultMessageListenerContainer.java:947)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
	at java.lang.Thread.run(Thread.java:619)
Caused by: java.lang.OutOfMemoryError: Java heap space
	at java.util.Arrays.copyOf(Arrays.java:2882)
	at java.lang.AbstractStringBuilder.expandCapacity(AbstractStringBuilder.java:100)
	at java.lang.AbstractStringBuilder.append(AbstractStringBuilder.java:515)
	at java.lang.StringBuffer.append(StringBuffer.java:306)
	at java.io.StringWriter.write(StringWriter.java:77)
	at java.io.BufferedWriter.flushBuffer(BufferedWriter.java:111)
	at java.io.BufferedWriter.flush(BufferedWriter.java:235)
	at com.sun.xml.bind.v2.runtime.MarshallerImpl.cleanUp(MarshallerImpl.java:334)
	at com.sun.xml.bind.v2.runtime.MarshallerImpl.write(MarshallerImpl.java:327)
	at com.sun.xml.bind.v2.runtime.MarshallerImpl.marshal(MarshallerImpl.java:244)
	at javax.xml.bind.helpers.AbstractMarshallerImpl.marshal(AbstractMarshallerImpl.java:95)
	at de.mt.esb.ecom.ads.AffiliateProcessor.memoryMarshall(AffiliateProcessor.java:179)
	at de.mt.esb.ecom.ads.AffiliateProcessor.process(AffiliateProcessor.java:109)
	at org.apache.camel.impl.converter.AsyncProcessorTypeConverter$ProcessorToAsyncProcessorBridge.process(AsyncProcessorTypeConverter.java:48)
	at org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:78)
	at org.apache.camel.processor.DelegateAsyncProcessor.processNext(DelegateAsyncProcessor.java:98)
	at org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:89)
	at org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:78)
	at org.apache.camel.processor.DelegateAsyncProcessor.processNext(DelegateAsyncProcessor.java:98)
	at org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:89)
	at org.apache.camel.management.InstrumentationProcessor.process(InstrumentationProcessor.java:69)
	at org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:78)
	at org.apache.camel.processor.DelegateAsyncProcessor.processNext(DelegateAsyncProcessor.java:98)
	at org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:89)
	at org.apache.camel.processor.interceptor.TraceInterceptor.process(TraceInterceptor.java:90)
	at org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:78)
	at org.apache.camel.processor.RedeliveryErrorHandler.processErrorHandler(RedeliveryErrorHandler.java:318)
	at org.apache.camel.processor.RedeliveryErrorHandler.process(RedeliveryErrorHandler.java:209)
	at org.apache.camel.processor.DefaultChannel.process(DefaultChannel.java:306)
	at org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:78)
	at org.apache.camel.processor.Pipeline.process(Pipeline.java:116)
	at org.apache.camel.processor.Pipeline.process(Pipeline.java:79)
]

Re: Java Heap Space: out of memory

Richard MacCutchan21-Aug-18 21:23

Richard MacCutchan

21-Aug-18 21:23

You need to find out why it is running out of heap space, see Understand the OutOfMemoryError Exception[^].

Re: Java Heap Space: out of memory

Member 1401730113-Oct-18 7:15

Member 14017301

13-Oct-18 7:15

While I am surfing I came across one tool named Java & Android Heap Dump Analyzer I hope this will clear out all the memory related issues.

java code for hadoop for builting data warehouse

Shivendra chavan19-Aug-18 19:58

Shivendra chavan

19-Aug-18 19:58

I want java code for hadoop for builting data warehouse.anyone plz help.

Re: java code for hadoop for builting data warehouse

Richard MacCutchan19-Aug-18 21:27

Richard MacCutchan

19-Aug-18 21:27

I want a Ferrari and a speedboat.

Forum Guidelines - PLEASE READ - Java Discussion Boards[^]

Java

Member 1394945814-Aug-18 15:46

Member 13949458

14-Aug-18 15:46

How to design fingerprint (gui)and how to implement the codes.

Re: Java

Richard MacCutchan14-Aug-18 20:42

Richard MacCutchan

14-Aug-18 20:42

By researching all the features that your application requires.

Re: Java

jschell19-Aug-18 7:36

jschell

19-Aug-18 7:36

1. Learn basics of java
2. Learn basics of UI work
3. Choose a device to sample fingerprints
4. Learn about the API for that device.
5. Learn about image analysis
6. Learn how to build applications (more complicated that #1.)
7. Put all of the above together.

Re: Java

mohit gite22-Nov-18 22:46

mohit gite

22-Nov-18 22:46

Quote:
up vote
28
down vote
accepted
You need the fingerprint-gui package, its installation is described at Fingerprint GUI launchpad page and reproduced below:

Add PP and install fingerprint-gui and other required packages

sudo add-apt-repository ppa:fingerprint/fingerprint-gui
sudo apt update
sudo apt install libbsapi policykit-1-fingerprint-gui fingerprint-gui
Log out of your session and log back in.

Launch “Fingerprint GUI” and enrol your fingerprints.
Please note: I've used fingerprint readers on various laptops before, they are not very reliable so make sure you don't configure it to be the only source of authentication. It's best to add it on top of passwords as well or you may get locked out at some point.

Re: Java

GiteHrudaya26-Nov-18 23:03

GiteHrudaya

26-Nov-18 23:03

public class BiometricUtils {


    public static boolean isBiometricPromptEnabled() {
        return (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P);
    }


    /*
     * Condition I: Check if the android version in device is greater than
     * Marshmallow, since fingerprint authentication is only supported
     * from Android 6.0.
     * Note: If your project's minSdkversion is 23 or higher,
     * then you won't need to perform this check.
     *
     * */
    public static boolean isSdkVersionSupported() {
        return (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M);
    }

javacode for read csv file without using jquery,jdbc,sql

Member 1394487210-Aug-18 0:58

Member 13944872

10-Aug-18 0:58

import java.io.File;
import java.io.FileNotFoundException;
import java.util.*;
public class Main 
{
 public static void main(String[] args) 
 {
    String fileName="winner.csv";
    File file = new File(fileName);
    try 
    {
     Scanner inputStream = new Scanner(file);
     inputStream.next();	// to skip headers
     while(inputStream.hasNext()) 
     {
      System.out.println();
     StringTokenizer data = new StringTokenizer(inputStream.next(),",");
     while(data.hasMoreTokens())   
   {      
       System.out.print(""+data.nextToken());
       //String datas = inputStream.next(); 
       //System.out.println("\t"+datas);
       //String[] values = datas.split(",");
       //System.out.println(values[2]);
       
}
      }
      inputStream.close();
    } 
   catch (FileNotFoundException e) 
   {
      e.printStackTrace();
   }
  }
}

Re: javacode for read csv file without using jquery,jdbc,sql

Richard MacCutchan12-Aug-18 21:00

Richard MacCutchan

12-Aug-18 21:00

What is the question?

New to this forum

Member 1392578425-Jul-18 13:01

Member 13925784

25-Jul-18 13:01

Hi all,

I know its slightly broad topic, but I struggle to code everyday... Like I would practice coding like 2 days in a row then suddenly I stop. This is honestly making it hard for me to get better at coding.

Any tips etc, my first step was to sign up to this forum so I can communicate with coders more often.

Thanks ! Thumbs Up | :thumbsup:

Re: New to this forum

Richard MacCutchan25-Jul-18 21:19

Richard MacCutchan

25-Jul-18 21:19

Start here: The Java™ Tutorials[^]. You should also read Forum Guidelines - PLEASE READ - Java Discussion Boards[^].

Help to pick a career route

Алексей Кузнецов15-Jul-18 21:10

Алексей Кузнецов

15-Jul-18 21:10

Hi, everyone!

On my job I have 2 work options:

1) Join Apache community and start working on one large open source project
pros: deep dive into java core(I've been working on another open source for 1 year already + 4 years in java)

2) Join team to create large microservices platform.
pros: gain experience in microservices with Spring Cloud, Docker, PostgreSql, Netflix framework.

What is the best option you think?
From future best employment perspective.

Re: Help to pick a career route

Richard MacCutchan16-Jul-18 2:12

Richard MacCutchan

16-Jul-18 2:12

If you toss a coin to choose the answer will be just as valid. People here are unlikely to be able to foretell the future.
Choose the option that you will most enjoy working on and go from there.

Re: Help to pick a career route

jschell28-Jul-18 7:09

jschell

28-Jul-18 7:09

Алексей Кузнецов wrote:
Join team to create large microservices platform.

This will in general be a more employable skill.

Specialization in one library works well if a company wants that specialization but more want general knowledge instead. Micro-services, if you actually do that end to end, provide a general knowledge of more technologies along with the micro-services idiom itself.

I'm trying to right justify my integers but it isn't working

Member 1297423514-Jul-18 6:09

Member 12974235

14-Jul-18 6:09

I have four simple computations in my program. All integer results. I want the output to be right justified but it ain't looking that way.

Right now the 5 underneath the 30 looks like it's being placed between the 3 and the 0 (in the above number 30). The -10 looks like it is being correctly right justified. The -10 looks like it is being correctly right justified with the 30. And the 200 takes up the maximum field width of 3 which I have set.

My output has a ragged right appearance so I don't know where I'm going wrong.

My code looks like this:

public class FormattingOutput
{
	public static void main(String args[])
	{
		
		int a, b, c, d;
		
		a = 10 + 20;
		b = 10 - 5;
		c = 10 - 20;
		d = 10 * 20;
		
		System.out.printf("%3d%n", a);
		System.out.printf("%3d%n", b);
		System.out.printf("%3d%n", c);
		System.out.printf("%3d", d);
	}
}

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