Question

当我登录Hazelcast管理中心时，我收到以下异常。不确定究竟是什么导致了这个问题。

管理中心部署在Weblogic 12c

中

Hazelcast版本：3.1.3

 java.lang.reflect.InvocationTargetException
        at sun.reflect.GeneratedMethodAccessor534.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:601)
        at org.apache.commons.beanutils.MethodUtils.invokeMethod(MethodUtils.java:282)
        at org.apache.commons.beanutils.MethodUtils.invokeMethod(MethodUtils.java:226)
        at org.apache.commons.beanutils.MethodUtils.invokeMethod(MethodUtils.java:177)
        at com.hazelcast.webmonitor.service.DataService.invokeMethod(DataService.java:108)
        at com.hazelcast.webmonitor.service.DataService.getResponse(DataService.java:86)
        at com.hazelcast.webmonitor.servlet.MainServlet.doGet(MainServlet.java:80)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:844)
        at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:242)
        at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:216)
        at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:132)
        at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:338)
        at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:221)
        at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.wrapRun(WebAppServletContext.java:3284)
        at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.__run(WebAppServletContext.java:3254)
        at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java)
        at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
        at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:120)
        at weblogic.servlet.provider.WlsSubjectHandle.run(WlsSubjectHandle.java:57)
        at weblogic.servlet.internal.WebAppServletContext.doSecuredExecute(WebAppServletContext.java:2163)
        at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2089)
        at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2074)
        at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1513)
        at weblogic.servlet.provider.ContainerSupportProviderImpl$WlsRequestExecutor.run(ContainerSupportProviderImpl.java:254)
        at weblogic.work.ExecuteThread.execute(ExecuteThread.java:256)
        at weblogic.work.ExecuteThread.run(ExecuteThread.java:221)
    Caused by: java.lang.NullPointerException
        at java.util.LinkedList$ListItr.next(LinkedList.java:891)
        at java.util.SubList$1.next(AbstractList.java:707)
        at java.util.AbstractCollection.toArray(AbstractCollection.java:141)
        at java.util.Collections.sort(Collections.java:216)
        at com.hazelcast.webmonitor.service.WarningLogsManager.getSystemWarnings(WarningLogsManager.java:96)
        at com.hazelcast.webmonitor.service.DataService.showSystemWarning(DataService.java:717)
        ... 29 more

Answer 1

所以最后这个问题得到了解决。我将以下首选包列表添加到我的weblogic.xml文件中，因为它是由CAT工具建议的。

<wls:package-name>javax.activation.*</wls:package-name>
   <wls:package-name>javax.mail.*</wls:package-name>
   <wls:package-name>javax.mail.event.*</wls:package-name>
   <wls:package-name>javax.mail.internet.*</wls:package-name>
   <wls:package-name>javax.mail.search.*</wls:package-name>
   <wls:package-name>javax.mail.util.*</wls:package-name>
   <wls:package-name>org.apache.commons.*</wls:package-name>

删除那些修复了问题。

Answer 2

我刚查过代码。这个例外没有任何意义。您使用的是哪个JVM。也许在像jetty，tomcat等更轻量级的容器上运行更聪明。

登录hazelcast管理中心正在抛出NullPointerException

2 个答案: