Captcha image doesn't render

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Symptoms

The captcha image is not loaded and the following stack trace can be seen in the atlassian-stash.log:

2014-12-15 09:41:56,029 ERROR [http-bio-7990-exec-14] @12Q0SCVx581x330x2 1r0vx13 XX.XX.XX.XX,0:0:0:0:0:0:0:1 "GET /captcha HTTP/1.1" c.a.s.i.w.HandlerExceptionResolverImpl Error creating bean with name 'imageCaptchaServicePrototype' defined in class path resource [stash-context.xml]: Cannot create inner bean 'com.atlassian.stash.internal.web.util.captcha.StashCaptchaEngine#4ff29711' of type [com.atlassian.stash.internal.web.util.captcha.StashCaptchaEngine] while setting constructor argument; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'com.atlassian.stash.internal.web.util.captcha.StashCaptchaEngine#4ff29711' defined in class path resource [stash-context.xml]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [com.atlassian.stash.internal.web.util.captcha.StashCaptchaEngine]: Constructor threw exception; nested exception is java.lang.NullPointerException
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'imageCaptchaServicePrototype' defined in class path resource [stash-context.xml]: Cannot create inner bean 'com.atlassian.stash.internal.web.util.captcha.StashCaptchaEngine#4ff29711' of type [com.atlassian.stash.internal.web.util.captcha.StashCaptchaEngine] while setting constructor argument; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'com.atlassian.stash.internal.web.util.captcha.StashCaptchaEngine#4ff29711' defined in class path resource [stash-context.xml]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [com.atlassian.stash.internal.web.util.captcha.StashCaptchaEngine]: Constructor threw exception; nested exception is java.lang.NullPointerException
	at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveInnerBean(BeanDefinitionValueResolver.java:290) ~[spring-beans-4.0.5.RELEASE.jar:4.0.5.RELEASE]
	at com.atlassian.stash.internal.web.users.CaptchaController.viewCaptcha(CaptchaController.java:29) ~[CaptchaController.class:na]
	at com.atlassian.applinks.core.rest.context.ContextFilter.doFilter(ContextFilter.java:25) [applinks-plugin-4.2.2_1402956146000.jar:na]
	at com.atlassian.stash.internal.spring.security.StashAuthenticationFilter.doFilter(StashAuthenticationFilter.java:111) [StashAuthenticationFilter.class:na]
	at com.atlassian.stash.internal.web.auth.BeforeLoginPluginAuthenticationFilter.doInsideSpringSecurityChain(BeforeLoginPluginAuthenticationFilter.java:111) [BeforeLoginPluginAuthenticationFilter.class:na]
	at com.atlassian.stash.internal.web.auth.BeforeLoginPluginAuthenticationFilter.doFilter(BeforeLoginPluginAuthenticationFilter.java:77) [BeforeLoginPluginAuthenticationFilter.class:na]
	at com.atlassian.security.auth.trustedapps.filter.TrustedApplicationsFilter.doFilter(TrustedApplicationsFilter.java:100) [atlassian-trusted-apps-core-3.0.6.jar:na]
	at com.atlassian.oauth.serviceprovider.internal.servlet.OAuthFilter.doFilter(OAuthFilter.java:69) [atlassian-oauth-service-provider-plugin-1.9.2_1399475174000.jar:na]
	at com.hazelcast.web.WebFilter$RequestWrapper$1.forward(WebFilter.java:525) [hazelcast-wm-3.3-RC2.jar:3.3-RC2]
	at com.atlassian.security.auth.trustedapps.filter.TrustedApplicationsFilter.doFilter(TrustedApplicationsFilter.java:100) [atlassian-trusted-apps-core-3.0.6.jar:na]
	at com.atlassian.oauth.serviceprovider.internal.servlet.OAuthFilter.doFilter(OAuthFilter.java:69) [atlassian-oauth-service-provider-plugin-1.9.2_1399475174000.jar:na]
	at com.atlassian.analytics.client.filter.DefaultAnalyticsFilter.doFilter(DefaultAnalyticsFilter.java:33) [analytics-client-3.35_1406650100000.jar:na]
	at com.atlassian.core.filters.AbstractHttpFilter.doFilter(AbstractHttpFilter.java:31) [atlassian-core-4.6.15.jar:na]
	at com.atlassian.stash.internal.web.auth.BeforeLoginPluginAuthenticationFilter.doBeforeBeforeLoginFilters(BeforeLoginPluginAuthenticationFilter.java:89) [BeforeLoginPluginAuthenticationFilter.class:na]
	at com.atlassian.stash.internal.web.auth.BeforeLoginPluginAuthenticationFilter.doFilter(BeforeLoginPluginAuthenticationFilter.java:75) [BeforeLoginPluginAuthenticationFilter.class:na]
	at com.atlassian.stash.internal.request.DefaultRequestManager.doAsRequest(DefaultRequestManager.java:84) [stash-service-impl-3.2.2.jar:na]
	at com.hazelcast.web.WebFilter.doFilter(WebFilter.java:446) [hazelcast-wm-3.3-RC2.jar:3.3-RC2]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) [na:1.7.0_03-icedtea]
	at java.lang.Thread.run(Thread.java:722) [na:1.7.0_03-icedtea]
	... 240 frames trimmed
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'com.atlassian.stash.internal.web.util.captcha.StashCaptchaEngine#4ff29711' defined in class path resource [stash-context.xml]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [com.atlassian.stash.internal.web.util.captcha.StashCaptchaEngine]: Constructor threw exception; nested exception is java.lang.NullPointerException
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1076) ~[spring-beans-4.0.5.RELEASE.jar:4.0.5.RELEASE]
	... 19 common frames omitted
Caused by: org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [com.atlassian.stash.internal.web.util.captcha.StashCaptchaEngine]: Constructor threw exception; nested exception is java.lang.NullPointerException
	at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:164) ~[spring-beans-4.0.5.RELEASE.jar:4.0.5.RELEASE]
	... 19 common frames omitted
Caused by: java.lang.NullPointerException: null
	at sun.awt.X11FontManager.getDefaultPlatformFont(X11FontManager.java:779) ~[na:1.7.0_03-icedtea]
	at sun.font.SunFontManager$2.run(SunFontManager.java:428) ~[na:1.7.0_03-icedtea]
	at java.security.AccessController.doPrivileged(Native Method) ~[na:1.7.0_03-icedtea]
	at sun.font.SunFontManager.<init>(SunFontManager.java:371) ~[na:1.7.0_03-icedtea]
	at sun.awt.X11FontManager.<init>(X11FontManager.java:32) ~[na:1.7.0_03-icedtea]
	at java.lang.Class.newInstance0(Class.java:372) ~[na:1.7.0_03-icedtea]
	at java.lang.Class.newInstance(Class.java:325) ~[na:1.7.0_03-icedtea]
	at sun.font.FontManagerFactory$1.run(FontManagerFactory.java:80) ~[na:1.7.0_03-icedtea]
	at java.security.AccessController.doPrivileged(Native Method) ~[na:1.7.0_03-icedtea]
	at sun.font.FontManagerFactory.getInstance(FontManagerFactory.java:71) ~[na:1.7.0_03-icedtea]
	at java.awt.Font.getFont2D(Font.java:489) ~[na:1.7.0_03-icedtea]
	at java.awt.Font.canDisplay(Font.java:1946) ~[na:1.7.0_03-icedtea]
	at com.octo.captcha.component.image.fontgenerator.RandomFontGenerator.checkFontCanDisplayCharacters(RandomFontGenerator.java:223) ~[jcaptcha-2.0-alpha-1.jar:na]
	at com.octo.captcha.component.image.fontgenerator.RandomFontGenerator.cleanFontList(RandomFontGenerator.java:179) ~[jcaptcha-2.0-alpha-1.jar:na]
	at com.octo.captcha.component.image.fontgenerator.RandomFontGenerator.initializeFonts(RandomFontGenerator.java:94) ~[jcaptcha-2.0-alpha-1.jar:na]
	at com.octo.captcha.component.image.fontgenerator.RandomFontGenerator.<init>(RandomFontGenerator.java:81) ~[jcaptcha-2.0-alpha-1.jar:na]
	at com.atlassian.stash.internal.web.util.captcha.StashCaptchaEngine.buildInitialFactories(StashCaptchaEngine.java:46) ~[StashCaptchaEngine.class:na]
	at com.octo.captcha.engine.image.ListImageCaptchaEngine.<init>(ListImageCaptchaEngine.java:24) ~[jcaptcha-2.0-alpha-1.jar:na]
	at com.atlassian.stash.internal.web.util.captcha.StashCaptchaEngine.<init>(StashCaptchaEngine.java:29) ~[StashCaptchaEngine.class:na]
	at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:148) ~[spring-beans-4.0.5.RELEASE.jar:4.0.5.RELEASE]
	... 19 common frames omitted

Cause

This is caused because of missing fonts, due to which the application cannot perform graphics rendering. Although we support OpenJDK it's likely that this issue was caused because the package manager used to install Java didn't install "Java fonts".

Resolution

  1. Install the JDK Fonts package on top of the Oracle JDK by running:

    sudo apt-get install fonts-dejavu-core
  2. Restart Stash.

Check the Supported platforms page to ensure a compatible environment.

Last modified on Feb 26, 2016

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