最近把IntelliJ IDEA升級到2016.2.1後，在JSP裡的code complete就有問題，在物件變數後按 . 應該要出現能使用的多個methods，卻只出現一個，查了C:\Users\使用者.IntelliJIdea2016.2\system\log\idea.log後發現有Exception：
2016-08-15 22:04:56,351 [ 302048] ERROR - on.CompletionProgressIndicator - com.intellij.psi.impl.source.jsp.JspJavaFileImpl cannot be cast to com.intellij.psi.jsp.JspFile
java.lang.ClassCastException: com.intellij.psi.impl.source.jsp.JspJavaFileImpl cannot be cast to com.intellij.psi.jsp.JspFile
at com.intellij.psi.impl.source.jsp.JspContextManagerImpl.processContextElements(JspContextManagerImpl.java:209)
at com.intellij.psi.impl.source.jsp.JspJavaFileImpl.processDeclarations(JspJavaFileImpl.java:49)
at com.intellij.psi.scope.util.PsiScopesUtil.treeWalkUp(PsiScopesUtil.java:68)
at com.intellij.psi.scope.util.PsiScopesUtil.treeWalkUp(PsiScopesUtil.java:50)
at com.intellij.psi.scope.util.PsiScopesUtil.resolveAndWalk(PsiScopesUtil.java:226)
at com.intellij.psi.scope.util.PsiScopesUtil.resolveAndWalk(PsiScopesUtil.java:157)
at com.intellij.psi.impl.source.PsiJavaCodeReferenceElementImpl.a(PsiJavaCodeReferenceElementImpl.java:448)
at com.intellij.psi.impl.source.PsiJavaCodeReferenceElementImpl.access$100(PsiJavaCodeReferenceElementImpl.java:55)
at com.intellij.psi.impl.source.PsiJavaCodeReferenceElementImpl$OurGenericsResolver.resolve(PsiJavaCodeReferenceElementImpl.java:350)
at com.intellij.psi.impl.source.PsiJavaCodeReferenceElementImpl$OurGenericsResolver.resolve(PsiJavaCodeReferenceElementImpl.java:342)
at com.intellij.psi.impl.source.resolve.ResolveCache$4.compute(ResolveCache.java:191)
at com.intellij.psi.impl.source.resolve.ResolveCache$4.compute(ResolveCache.java:188)
at com.intellij.openapi.util.RecursionManager$2.doPreventingRecursion(RecursionManager.java:112)
at com.intellij.psi.impl.source.resolve.ResolveCache.resolveWithCaching(ResolveCache.java:188)
at com.intellij.psi.impl.PsiImplUtil.multiResolveImpl(PsiImplUtil.java:752)
at com.intellij.psi.impl.PsiImplUtil.multiResolveImpl(PsiImplUtil.java:741)
at com.intellij.psi.impl.source.PsiJavaCodeReferenceElementImpl.multiResolve(PsiJavaCodeReferenceElementImpl.java:377)
at com.intellij.psi.impl.source.PsiJavaCodeReferenceElementImpl.advancedResolve(PsiJavaCodeReferenceElementImpl.java:370)
at com.intellij.psi.impl.source.PsiClassReferenceType.resolveGenerics(PsiClassReferenceType.java:145)
at com.intellij.psi.util.PsiUtil.captureToplevelWildcards(PsiUtil.java:784)
at com.intellij.psi.impl.PsiImplUtil.normalizeWildcardTypeByPosition(PsiImplUtil.java:384)
at com.intellij.psi.impl.source.tree.java.PsiReferenceExpressionImpl$TypeEvaluator.fun(PsiReferenceExpressionImpl.java:416)
at com.intellij.psi.impl.source.tree.java.PsiReferenceExpressionImpl$TypeEvaluator.fun(PsiReferenceExpressionImpl.java:361)
at com.intellij.psi.impl.source.resolve.JavaResolveCache.getType(JavaResolveCache.java:87)
at com.intellij.psi.impl.source.tree.java.PsiReferenceExpressionImpl.getType(PsiReferenceExpressionImpl.java:428)
at com.intellij.codeInsight.template.postfix.util.JavaPostfixTemplatesUtils.c(JavaPostfixTemplatesUtils.java:153)
at com.intellij.openapi.util.Conditions$And.value(Conditions.java:179)
at com.intellij.openapi.util.Conditions$And.value(Conditions.java:179)
at com.intellij.util.containers.ContainerUtil.findAll(ContainerUtil.java:1029)
at com.intellij.util.containers.ContainerUtil.filter(ContainerUtil.java:1008)
at com.intellij.codeInsight.template.postfix.templates.PostfixTemplateExpressionSelectorBase.getExpressions(PostfixTemplateExpressionSelectorBase.java:60)
at com.intellij.codeInsight.template.postfix.templates.PostfixTemplateExpressionSelectorBase.hasExpression(PostfixTemplateExpressionSelectorBase.java:50)
at com.intellij.codeInsight.template.postfix.templates.PostfixTemplateWithExpressionSelector.isApplicable(PostfixTemplateWithExpressionSelector.java:54)
at com.intellij.codeInsight.template.postfix.templates.PostfixLiveTemplate.a(PostfixLiveTemplate.java:266)
at com.intellij.codeInsight.template.postfix.templates.PostfixLiveTemplate.getLookupElements(PostfixLiveTemplate.java:211)
at com.intellij.codeInsight.template.CustomLiveTemplateBase.addCompletions(CustomLiveTemplateBase.java:53)
at com.intellij.codeInsight.template.impl.LiveTemplateCompletionContributor.a(LiveTemplateCompletionContributor.java:153)
at com.intellij.codeInsight.template.impl.LiveTemplateCompletionContributor.access$100(LiveTemplateCompletionContributor.java:50)
at com.intellij.codeInsight.template.impl.LiveTemplateCompletionContributor$2.a(LiveTemplateCompletionContributor.java:93)
at com.intellij.codeInsight.completion.CompletionResultSet.passResult(CompletionResultSet.java:69)
at com.intellij.codeInsight.completion.JavaNoVariantsDelegator$ResultTracker.consume(JavaNoVariantsDelegator.java:206)
at com.intellij.codeInsight.completion.JavaNoVariantsDelegator$1.consume(JavaNoVariantsDelegator.java:49)
at com.intellij.codeInsight.completion.JavaNoVariantsDelegator$1.consume(JavaNoVariantsDelegator.java:46)
at com.intellij.codeInsight.completion.CompletionResultSet.passResult(CompletionResultSet.java:69)
at com.intellij.codeInsight.completion.impl.CompletionServiceImpl$CompletionResultSetImpl.addElement(CompletionServiceImpl.java:135)
at com.intellij.codeInsight.completion.JavaCompletionContributor.a(JavaCompletionContributor.java:412)
at com.intellij.codeInsight.completion.LegacyCompletionContributor.a(LegacyCompletionContributor.java:124)
at com.intellij.codeInsight.completion.LegacyCompletionContributor.processReferences(LegacyCompletionContributor.java:107)
at com.intellij.codeInsight.completion.JavaCompletionContributor.b(JavaCompletionContributor.java:366)
at com.intellij.codeInsight.completion.JavaCompletionContributor.fillCompletionVariants(JavaCompletionContributor.java:234)
at com.intellij.codeInsight.completion.CompletionService.getVariantsFromContributors(CompletionService.java:81)
at com.intellij.codeInsight.completion.CompletionResultSet.runRemainingContributors(CompletionResultSet.java:132)
at com.intellij.codeInsight.completion.CompletionResultSet.runRemainingContributors(CompletionResultSet.java:125)
at com.intellij.codeInsight.completion.JavaNoVariantsDelegator.fillCompletionVariants(JavaNoVariantsDelegator.java:61)
at com.intellij.codeInsight.completion.CompletionService.getVariantsFromContributors(CompletionService.java:81)
at com.intellij.codeInsight.completion.CompletionResultSet.runRemainingContributors(CompletionResultSet.java:132)
at com.intellij.codeInsight.completion.CompletionResultSet.runRemainingContributors(CompletionResultSet.java:125)
at com.intellij.codeInsight.template.impl.LiveTemplateCompletionContributor$2.addCompletions(LiveTemplateCompletionContributor.java:90)
at com.intellij.codeInsight.completion.CompletionProvider.addCompletionVariants(CompletionProvider.java:36)
at com.intellij.codeInsight.completion.CompletionContributor.fillCompletionVariants(CompletionContributor.java:155)
at com.intellij.codeInsight.completion.CompletionService.getVariantsFromContributors(CompletionService.java:81)
at com.intellij.codeInsight.completion.CompletionService.performCompletion(CompletionService.java:110)
at com.intellij.codeInsight.completion.CompletionProgressIndicator.a(CompletionProgressIndicator.java:776)
at com.intellij.codeInsight.completion.CompletionProgressIndicator.access$500(CompletionProgressIndicator.java:90)
at com.intellij.codeInsight.completion.CompletionProgressIndicator$1CalculateItems.run(CompletionProgressIndicator.java:758)
at com.intellij.codeInsight.completion.AsyncCompletion.b(CompletionThreading.java:87)
at com.intellij.openapi.application.impl.ApplicationImpl.runReadAction(ApplicationImpl.java:856)
at com.intellij.codeInsight.completion.AsyncCompletion.a(CompletionThreading.java:84)
at com.intellij.openapi.progress.impl.CoreProgressManager$3.run(CoreProgressManager.java:170)
at com.intellij.openapi.progress.impl.CoreProgressManager.a(CoreProgressManager.java:494)
at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:443)
at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:54)
at com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:155)
at com.intellij.codeInsight.completion.AsyncCompletion.a(CompletionThreading.java:82)
at com.intellij.openapi.application.impl.ApplicationImpl$2.run(ApplicationImpl.java:308)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
2016-08-15 22:04:56,351 [ 302048] ERROR - on.CompletionProgressIndicator - IntelliJ IDEA 2016.2.1 Build #IU-162.1447.26
最後重新安裝2016.2.2的EAP版就正常了。
＃＃
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