cpu useage 100%

Description

when is use JCaptcha in multithreading,cpu usage 100%,use jconsole,the stack :
??? http-5555-Processor387
??? RUNNABLE
?????1,564 ????? 16

?????
sun.font.GlyphLayout$LayoutEngineKey.equals(GlyphLayout.java:124)
java.util.HashMap.eq(HashMap.java:277)
java.util.HashMap.get(HashMap.java:326)
sun.font.SunLayoutEngine.getEngine(SunLayoutEngine.java:113)
sun.font.GlyphLayout$EngineRecord.init(GlyphLayout.java:565)
sun.font.GlyphLayout.nextEngineRecord(GlyphLayout.java:439)
sun.font.GlyphLayout.layout(GlyphLayout.java:362)
sun.font.ExtendedTextSourceLabel.createGV(ExtendedTextSourceLabel.java:267)
sun.font.ExtendedTextSourceLabel.getGV(ExtendedTextSourceLabel.java:252)
sun.font.ExtendedTextSourceLabel.createLogicalBounds(ExtendedTextSourceLabel.java:163)
sun.font.ExtendedTextSourceLabel.getAdvance(ExtendedTextSourceLabel.java:85)
java.awt.font.TextLine.init(TextLine.java:245)
java.awt.font.TextLine.<init>(TextLine.java:99)
java.awt.font.TextLine.fastCreateTextLine(TextLine.java:740)
java.awt.font.TextLayout.fastInit(TextLayout.java:695)
java.awt.font.TextLayout.<init>(TextLayout.java:611)
sun.java2d.SunGraphics2D.drawString(SunGraphics2D.java:2688)
com.octo.captcha.component.image.textpaster.ChangeableAttributedString.drawString(ChangeableAttributedString.java:93)
com.octo.captcha.component.image.textpaster.DecoratedRandomTextPaster.pasteText(DecoratedRandomTextPaster.java:86)
com.octo.captcha.component.image.wordtoimage.ComposedWordToImage.pasteText(ComposedWordToImage.java:130)
com.octo.captcha.component.image.wordtoimage.AbstractWordToImage.getImage(AbstractWordToImage.java:52)
com.octo.captcha.image.gimpy.GimpyFactory.getImageCaptcha(GimpyFactory.java:77)
com.octo.captcha.engine.image.ListImageCaptchaEngine.getNextImageCaptcha(ListImageCaptchaEngine.java:574)
com.octo.captcha.engine.image.ImageCaptchaEngine.getNextCaptcha(ImageCaptchaEngine.java:92)
com.octo.captcha.service.AbstractCaptchaService.generateAndStoreCaptcha(AbstractCaptchaService.java:148)
com.octo.captcha.service.AbstractManageableCaptchaService.generateCountTimeStampAndStoreCaptcha(AbstractManageableCaptchaService.java:339)
com.octo.captcha.service.AbstractManageableCaptchaService.generateAndStoreCaptcha(AbstractManageableCaptchaService.java:328)
com.octo.captcha.service.AbstractCaptchaService.getChallengeForID(AbstractCaptchaService.java:64)
com.octo.captcha.service.image.AbstractManageableImageCaptchaService.getImageChallengeForID(AbstractManageableImageCaptchaService.java:61)
com.huawei.unms.security.web.servlet.ImageCaptchaServlet.doGet(ImageCaptchaServlet.java:82)
javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:78)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:77)
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
java.lang.Thread.run(Thread.java:595)

??? http-5555-Processor45
??? RUNNABLE
?????2,904 ????? 137

Environment

tomcat window 2003 spring+struts+hibernate

Activity

Show:

testhu

December 28, 2007, 1:04 PM

Copy link to comment

jdk1.5.06
spring config
<bean id="imageCaptchaService" class="com.octo.captcha.service.image.DefaultManageableImageCaptchaService">
<constructor-arg type="com.octo.captcha.service.captchastore.CaptchaStore" index="0">
<ref bean="fastHashMapCaptchaStore"/>
</constructor-arg>

<constructor-arg type="com.octo.captcha.engine.CaptchaEngine" index="1">
<ref bean="captchaEngineEx"/>
</constructor-arg>
<constructor-arg index="2">
<value>180</value>
</constructor-arg>
<constructor-arg index="3">
<value>100000</value>
</constructor-arg>
<constructor-arg index="4">
<value>75000</value>
</constructor-arg>
</bean>

/**

CaptchaEngineEx.java
*/
package security.web;

import java.awt.Color;

import com.octo.captcha.component.image.backgroundgenerator.BackgroundGenerator;
import com.octo.captcha.component.image.backgroundgenerator.GradientBackgroundGenerator;
import com.octo.captcha.component.image.color.SingleColorGenerator;
import com.octo.captcha.component.image.fontgenerator.FontGenerator;
import com.octo.captcha.component.image.fontgenerator.RandomFontGenerator;
import com.octo.captcha.component.image.textpaster.DecoratedRandomTextPaster;
import com.octo.captcha.component.image.textpaster.TextPaster;
import com.octo.captcha.component.image.wordtoimage.ComposedWordToImage;
import com.octo.captcha.component.word.wordgenerator.RandomWordGenerator;
import com.octo.captcha.engine.image.ListImageCaptchaEngine;
import com.octo.captcha.image.gimpy.GimpyFactory;

/**

Description:
*/
public class CaptchaEngineEx extends ListImageCaptchaEngine {

protected void buildInitialFactories() {
/**

Set Captcha Word Length Limitation which should not over 6
*/
Integer minAcceptedWordLength = new Integer(4);
Integer maxAcceptedWordLength = new Integer(4);
/**
* Set up Captcha Image Size: Height and Width
*/
Integer imageHeight = new Integer(24);
Integer imageWidth = new Integer(60);
/**
* Set Captcha Font Size between 50 and 55
*/
Integer minFontSize = new Integer(12);
Integer maxFontSize = new Integer(13);
/**
* We just generate digit for captcha source char Although you can use
* abcdefg......xyz
*/
com.octo.captcha.component.word.wordgenerator.WordGenerator wordGenerator = (new RandomWordGenerator(
"123456789"));
/**
* cyt and unruledboy proved that backgroup not a factor of Security. A
* captcha attacker won't affaid colorful backgroud, so we just use
* white color, like google and hotmail.
*/
BackgroundGenerator backgroundGenerator = new GradientBackgroundGenerator(
imageWidth, imageHeight, Color.white, Color.white);
/**
* font is not helpful for security but it really increase difficultness
* for attacker
*/
FontGenerator _fontGenerator = new RandomFontGenerator(minFontSize,
maxFontSize);
/**
* Note that our captcha color is Blue
*/
SingleColorGenerator scg = new SingleColorGenerator(Color.blue);
/**
* decorator is very useful pretend captcha attack. we use two line text
* decorators.
*/
// LineTextDecorator line_decorator = new LineTextDecorator(1, Color.blue);
// LineTextDecorator line_decorator2 = new LineTextDecorator(1,
// Color.blue);

/**

????decorator
*/
// TextDecorator[] textdecorators = new TextDecorator[1];
//
// textdecorators[0] = line_decorator;
// textdecorators[1] = line_decorator2;

TextPaster _textPaster = new DecoratedRandomTextPaster(
minAcceptedWordLength, maxAcceptedWordLength, scg,
null);

/**

ok, generate the WordToImage Object for logon service to use.
*/
com.octo.captcha.component.image.wordtoimage.WordToImage wordToImage = new ComposedWordToImage(
_fontGenerator, backgroundGenerator, _textPaster);
addFactory(new GimpyFactory(wordGenerator, wordToImage));
}
}

AntoineV

May 15, 2008, 11:52 PM

Copy link to comment

Could you try with a limited font list, thanks to a different constructor of the RandomFontGenerator.

See :

http://jcaptcha.sourceforge.net/jcaptcha/apidocs/com/octo/captcha/component/image/fontgenerator/RandomFontGenerator.html#RandomFontGenerator(java.lang.Integer,%20java.lang.Integer,%20java.awt.Font[])

Thanks

AntoineV

October 31, 2008, 8:23 PM

Copy link to comment

Is the problem still happening ?
Have you tried a limited font set ?

Cannot Reproduce

Assignee

AntoineV

Reporter

testhu

Labels

None

Affects versions

1.0_RC3

Priority

Critical

Configure