Eclipse java.io.IOException:别名[…]未标识密钥项

我有一个带有Eclipse luna IDE的tomcat 8服务器。在我尝试在服务器上运行特定jsp之前，服务器工作正常，我遇到“tomcat无法启动”错误，有人告诉我删除.metadata.plugins\org.Eclipse.core.resources中的.snap文件。。完成此操作后，tomcat也不会为任何其他项目启动，我在控制台中遇到以下错误：

java.io.IOException: Alias name javacer does not identify a key entry
    at org.apache.tomcat.util.net.jsse.JSSESocketFactory.getKeyManagers(JSSESocketFactory.java:583)
    at org.apache.tomcat.util.net.jsse.JSSESocketFactory.getKeyManagers(JSSESocketFactory.java:521)
    at org.apache.tomcat.util.net.NioEndpoint.bind(NioEndpoint.java:363)
    at org.apache.tomcat.util.net.AbstractEndpoint.init(AbstractEndpoint.java:730)
    at org.apache.coyote.AbstractProtocol.init(AbstractProtocol.java:456)
    at org.apache.coyote.http11.AbstractHttp11JsseProtocol.init(AbstractHttp11JsseProtocol.java:120)
    at org.apache.catalina.connector.Connector.initInternal(Connector.java:960)
    at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:102)
    at org.apache.catalina.core.StandardService.initInternal(StandardService.java:567)
    at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:102)
    at org.apache.catalina.core.StandardServer.initInternal(StandardServer.java:842)
    at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:102)
    at org.apache.catalina.startup.Catalina.load(Catalina.java:576)
    at org.apache.catalina.startup.Catalina.load(Catalina.java:599)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:483)
    at org.apache.catalina.startup.Bootstrap.load(Bootstrap.java:310)
    at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:484)

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应该做些什么来解决这个问题？。。删除此服务器并设置一个新服务器对我有帮助吗？

尝试删除此服务器并创建一个新的服务器。这不能由此快照文件引起。您的应用程序没有启动，因为有两个问题：1）在密钥库中找不到别名为“javacer”的密钥。2） 缺少依赖项：

NoClassDefFoundError:1）javacer的Lorg/apache/commons/logging/Log

是我为web服务添加的安全证书。。但是这里不需要这样做，因为我没有连接到任何这样的服务。因为2）我已经添加了所有与服务器相关的jars文件，所以这些文件不应该也来了。。这就是为什么我认为可能是因为快照文件

Caused by: java.lang.NoClassDefFoundError: Lorg/apache/commons/logging/Log;
    at java.lang.Class.getDeclaredFields0(Native Method)
    at java.lang.Class.privateGetDeclaredFields(Class.java:2570)
    at java.lang.Class.getDeclaredFields(Class.java:1903)
    at org.apache.catalina.util.Introspection.getDeclaredFields(Introspection.java:106)
    at org.apache.catalina.startup.WebAnnotationSet.loadFieldsAnnotation(WebAnnotationSet.java:256)
    at org.apache.catalina.startup.WebAnnotationSet.loadApplicationServletAnnotations(WebAnnotationSet.java:132)
    at org.apache.catalina.startup.WebAnnotationSet.loadApplicationAnnotations(WebAnnotationSet.java:65)
    at org.apache.catalina.startup.ContextConfig.applicationAnnotationsConfig(ContextConfig.java:334)
    at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:774)
    at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:305)
    at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
    at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5095)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    ... 6 more
Caused by: java.lang.ClassNotFoundException: org.apache.commons.logging.Log
    at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1295)
    at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1147)
    ... 20 more