java.lang.NoClassDefFoundError：无法初始化类javax.imageio.ImageIO jboss EAP 6 [英] java.lang.NoClassDefFoundError: Could not initialize class javax.imageio.ImageIO jboss EAP 6

问题描述

我们正在使用JBoss EAP 6;一切都运作良好，直到生产环境。但是在生产中部署后，我们得到以下错误：

We are using the JBoss EAP 6; Everything works well till production environment. But Post deployment in production, we are getting the below error:

java.lang.NoClassDefFoundError: Could not initialize class javax.imageio.ImageIO 

我们正在创建Captcha的一个servlet中发生错误。这是发生此错误的行：

The error happening in one of the servlet where we are creating the Captcha. This is the line where this error is happening :

ImageIO.write(bufferedImage, "png", baos); 

以下是错误的堆栈跟踪：

Here is the stack trace for the Error :

Server:server-three] Caused by: java.lang.NoClassDefFoundError: Could not initialize class javax.imageio.ImageIO
[Server:server-three]   at org.fwcms.tc.servlet.Captcha.doGet(Captcha.java:150) [classes:]
[Server:server-three]   at javax.servlet.http.HttpServlet.service(HttpServlet.java:734) [jboss-servlet-api_3.0_spec.jar:1.0.2.Final-redhat-1]
[Server:server-three]   at javax.servlet.http.HttpServlet.service(HttpServlet.java:847) [jboss-servlet-api_3.0_spec.jar:1.0.2.Final-redhat-1]
[Server:server-three]   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:295) [jbossweb.jar:7.2.2.Final-redhat-1]
[Server:server-three]   ... 36 more

这不会发生在任何其他环境中。我们正在部署应用程序。解决这个问题的任何建议/指示都会对我有所帮助。

This is not happening any other environments. We are deploying the app as ear. Any suggestion/pointers in resolving this will help me a lot.

提前谢谢你。

问候，
Manjunath

Regards, Manjunath

推荐答案

我找到了解决方案。
您必须在其他操作之前使用ImageIO。
你可以通过添加：

I found solution. You have to inicializate ImageIO before other operations. You can do this by adding:

static {
        ImageIO.scanForPlugins();
}

例如进入您的Main类。

eg into your Main class.

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