这个问题必须记录一下。

现象：Eclipse Helios 启动时 hung 在 Initial Web Service Dom...查看log之后发现：

!ENTRY org.eclipse.osgi 4 0 2011-06-02 07:06:16.296

!MESSAGE Application error !STACK 1 java.lang.IllegalStateException: Unable to acquire application service. Ensure that the org.eclipse.core.runtime bundle is resolved and started (see config.ini).     at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:74)     at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:369)     at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)     at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)     at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)     at java.lang.reflect.Method.invoke(Unknown Source)     at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:619)     at org.eclipse.equinox.launcher.Main.basicRun(Main.java:574)     at org.eclipse.equinox.launcher.Main.run(Main.java:1407)

重现：在使用向导创建 Web Project 的时候，使用的 Dynamic web module version 默认为2.5。重启 Eclipse之后，加载 project的时候可能会出现。

原因：jst.web facet of 2.5 which is obviously a conflict with the 2.4 servlet api

解决方法：修改${project}/.settings/org.eclipse.wst.common.project.facet.core.xml - 将 <installed facet="jst.web" version="2.5"/> 改为 <installed facet="jst.web" version="2.4"/>

参考：

https://bugs.eclipse.org/bugs/show_bug.cgi?id=335423

http://www.xgap.org/ticket/419

 

 本文转自 august 51CTO博客，原文链接：http://blog.51cto.com/august/579542，如需转载请自行联系原作者