升级到WAS 7后的javax.servlet.UnavailableException
升级到WAS 7后的javax.servlet.UnavailableException
提问于 2012-09-19 22:06:56
我已经将我的应用程序从WAS 6迁移到WAS 7。代码没有显示任何编译错误或丢失任何东西，但当我尝试运行应用程序时，我得到以下异常。
[9/19/12 9:45:37:609 EDT] 00000009 extension W com.ibm.wsspi.webcontainer.extension.WebExtensionProcessor createServletWrapper Servlet action is currently unavailable: SRVE0203E: Servlet [action]: com.ibm.services.tools.citrus.ctl.ActionServlet was found, but is missing another required class.
SRVE0206E: This error typically implies that the servlet was originally compiled with classes which cannot be located by the server.所以我检查了ffdc异常跟踪，发现了以下异常。我已经包含了旧配置引用的所有jar。
[9/19/12 9:26:53:328 EDT] FFDC Exception:javax.servlet.UnavailableException SourceId:com.ibm.ws.webcontainer.webapp.WebApp.handleError ProbeId:912 Reporter:com.ibm.ws.webcontainer.webapp.WebAppImpl@475c475c
javax.servlet.UnavailableException: SRVE0203E: Servlet [action]: com.ibm.services.tools.citrus.ctl.ActionServlet was found, but is missing another required class.
SRVE0206E: This error typically implies that the servlet was originally compiled with classes which cannot be located by the server.
SRVE0187E: Check your class path to ensure that all classes required by the servlet are present.SRVE0210I: This problem can be debugged by recompiling the servlet using only the classes in the application's runtime class path
at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:534)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:502)
at com.ibm.ws.webcontainer.servlet.ServletWrapperImpl.handleRequest(ServletWrapperImpl.java:179)
at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.forward(WebAppRequestDispatcher.java:354)
at com.ibm.ws.webcontainer.webapp.WebApp.sendError(WebApp.java:3369)
at com.ibm.ws.webcontainer.webapp.WebApp.handleRequest(WebApp.java:3968)
at com.ibm.ws.webcontainer.webapp.WebGroup.handleRequest(WebGroup.java:276)
at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:931)
at com.ibm.ws.webcontainer.WSWebContainer.handleRequest(WSWebContainer.java:1583)
at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:186)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:452)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewRequest(HttpInboundLink.java:511)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.processRequest(HttpInboundLink.java:305)
at com.ibm.ws.http.channel.inbound.impl.HttpICLReadCallback.complete(HttpICLReadCallback.java:83)
at com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.futureCompleted(AioReadCompletionListener.java:165)
at com.ibm.io.async.AbstractAsyncFuture.invokeCallback(AbstractAsyncFuture.java:217)
at com.ibm.io.async.AsyncChannelFuture.fireCompletionActions(AsyncChannelFuture.java:161)
at com.ibm.io.async.AsyncFuture.completed(AsyncFuture.java:138)
at com.ibm.io.async.ResultHandler.complete(ResultHandler.java:204)
at com.ibm.io.async.ResultHandler.runEventProcessingLoop(ResultHandler.java:775)
at com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:905)
at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1604)我想知道这个问题的含义是什么，可以通过仅使用应用程序的运行时类路径中的类重新编译servlet来调试这个问题。
回答 2
Stack Overflow用户
发布于 2012-09-19 22:39:52
该错误指示您的servlet正在导入或依赖于升级后不再可用的类。由于异常没有命名缺失的类，WAS建议您根据WAS 7库编译您的应用程序。如果这样做，编译器会告诉您缺少哪个依赖类。您可能正在针对WAS6或其他库进行编译，这就是错误延迟到运行时的原因。
Stack Overflow用户
发布于 2019-03-12 17:39:05
按照以下步骤解决了这个问题：
1.指出java 8的JRE和服务器版本，即Window -> Preferences -> Java -> Installed JRE下的版本和WAS服务器的运行时环境应该相同。2.然后重新构建ears，在服务器上重新部署这些ears，之后我就可以运行应用程序了
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原文链接：
https://stackoverflow.com/questions/12496492
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