java - MuleESB - 无法初始化类 sun.awt.SunToolkit

Question

我正在尝试按照 Brigilin Stanley 编写的示例通过 cxf 重现创建 Web 服务:http://confluex.com/blog/jax-ws-service-with-cxf-in-mule/

这在 Mule Studio 中运行良好，但是当我部署到 Linux Red Hat 服务器时遇到一个奇怪的问题:

java.lang.NoClassDefFoundError: Could not initialize class sun.awt.SunToolkit
        at sun.awt.AppContext$2.run(AppContext.java:271)
        at sun.awt.AppContext$2.run(AppContext.java:260)
        at java.security.AccessController.doPrivileged(Native Method)
        at sun.awt.AppContext.initMainAppContext(AppContext.java:260)
        at sun.awt.AppContext.access$200(AppContext.java:133)
        at sun.awt.AppContext$3.run(AppContext.java:316)
        at sun.awt.AppContext$3.run(AppContext.java:298)
        at java.security.AccessController.doPrivileged(Native Method)
        at sun.awt.AppContext.getAppContext(AppContext.java:297)
        at sun.awt.AppContext$6.getContext(AppContext.java:839)
        at sun.misc.SharedSecrets.getJavaAWTAccess(SharedSecrets.java:201)
        at java.util.TimeZone.getDefaultInAppContext(TimeZone.java:734)
        at java.util.TimeZone.getDefaultRef(TimeZone.java:630)
        at java.util.Calendar.getInstance(Calendar.java:968)
        at org.apache.log4j.helpers.AbsoluteTimeDateFormat.<init>(AbsoluteTimeDa
teFormat.java:62)
        at org.apache.log4j.helpers.ISO8601DateFormat.<init>(ISO8601DateFormat.j
ava:46)
        at org.apache.log4j.helpers.PatternParser.finalizeConverter(PatternParse
r.java:256)
        at org.apache.log4j.helpers.PatternParser.parse(PatternParser.java:186)
        at org.apache.log4j.PatternLayout.<init>(PatternLayout.java:438)

有什么想法吗？谢谢

Answer 1

此异常通常表明该服务器没有 X 服务器。要告诉 awt 您处于“ headless ”服务器中，请使用以下 Java 系统属性:-Djava.awt.headless=true