Discussion :

[JuFromParis]

Salut,

Lors d'un traitement très long (environ 8h), j'écris des traces dans la console pour vérifier que le fonctionnement se passe bien..

Mais j'obtiens cette erreur :

Exception in thread "main" java.lang.StackOverFlow
at Java.io.PrintStream.flush(Unknown Source)

Est-ce lié à mes écritures dans la console comme je le pense? Car je n'écris nulle part d'autre que dans la console..

J'ai relancé le traitement -Xss2M pour voir ce que ca donne..

Merci de votre aide.

[adiGuba]

Salut,


On pourrait voir la suite du stacktrace...


Un StackOverFlow signifie que tu a rempli la pile d'appel des méthodes. En gros tu dois utiliser une méthode récursive qui boucle un peu trop.

Note : le problème ne vient surement pas de PrintStream.flush(). C'est juste pas de chance que ce soit tombé sur elle... C'est pourquoi il faudrait voir le reste du stacktrace.


Enfin je ne pense pas qu'augmenter le -Xss soit une bonne idée. Cela ne ferait que reporter le problème.
Il serait plus utile de "transformer" la méthode récursive en une version itérative...


a++

[hwoarang]

Salut,

La stack, c'est la pile d'appel. Visiblement, elle deborde. Il n'y aurait pas d'appel recursif dans ton appli ?

Il y a 2 cas :
1 - Bug logiciel d'une fonction recursive qui va trop loin
2 - Besoin d'une profondeur de stack particulierement elevée.

Dans le cas 1 => il faut debugger. Dans le cas 2 => il faut utiliser le parametre :

Code :

Sélectionner tout - Visualiser dans une fenêtre à part

java -Xss

qui permet d'augmenter la stack.

a+

[JuFromParis]

Merci les gars,

Je savais ce que voulait dire StackOverFlow et j'ai trouvé le soucis :


Pour pouvoir écrire des accents dans la fenêtre DOS, nous avions écrit ce petit bout de code :

Code :

Sélectionner tout - Visualiser dans une fenêtre à part

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if ( System.getProperty("os.name").startsWith("Windows") ){
			try {
				System.setOut ( new PrintStream(System.out, true, "CP850") );
			} 
			catch (UnsupportedEncodingException e) {
				e.printStackTrace();
			}
		}
		System.out.println(sMessage);

Pour provoquer l'erreur plus rapidement, j'ai réduit le Xss à 64K et voila l'erreur entière :

Code :

Sélectionner tout - Visualiser dans une fenêtre à part

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Exception in thread "main" java.lang.StackOverflowError
	at java.lang.System.arraycopy(Native Method)
	at java.io.BufferedOutputStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
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	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
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	at java.io.PrintStream.write(Unknown Source)
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	at java.io.PrintStream.write(Unknown Source)
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	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
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	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
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	at java.io.PrintStream.write(Unknown Source)
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	at java.io.PrintStream.write(Unknown Source)
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	at java.io.PrintStream.write(Unknown Source)
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	at java.io.PrintStream.write(Unknown Source)
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	at java.io.PrintStream.write(Unknown Source)
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	at java.io.PrintStream.write(Unknown Source)
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	at java.io.PrintStream.write(Unknown Source)
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	at java.io.PrintStream.write(Unknown Source)
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	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
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	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
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	at java.io.PrintStream.write(Unknown Source)
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	at java.io.PrintStream.write(Unknown Source)
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	at java.io.PrintStream.write(Unknown Source)
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	at java.io.PrintStream.write(Unknown Source)
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	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
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	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
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	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at sun.nio.cs.StreamEncoder.writeBytes(Unknown Source)
	at sun.nio.cs.StreamEncoder.implFlushBuffer(Unknown Source)
	at sun.nio.cs.StreamEncoder.flushBuffer(Unknown Source)
	at java.io.OutputStreamWriter.flushBuffer(Unknown Source)
	at java.io.PrintStream.write(Unknown Source)
	at java.io.PrintStream.print(Unknown Source)
	at java.io.PrintStream.println(Unknown Source)
	at Exemple.<init>(Exemple.java:35)
	at Exemple.main(Exemple.java:44)

Donc finalement, la récursivité doit se situer dans la classe PrintStream, non?

Qu'en pensez-vous?

Merci de votre aide.

[adiGuba]

Etrange... Tu redéfini bien le System.setOut() une seule fois ?


Sinon tu aurais un code minimum qui reproduit le problème ???

a++

[JuFromParis]

Bah nan, en fait, le soucis, c'est que je le faisais a chaque fois ce System.setOut..

Si je le fais au début du main, tout les System.Out.Println() du programme seront modifié ?

[JuFromParis]

Bah nan, en fait, le soucis, c'est que je le faisais a chaque fois ce System.setOut..

Si je le fais au début du main, tout les System.Out.Println() du programme seront modifié ?

Oui..