1.打开日志文件看看报错原因：C:\Users\Administrator\.IntelliJIdea2018.2\system\log

 

 

2.打开idea.log，发现最新的报错如下：

2020-09-07 09:43:16,693 [ 315162]   WARN - mponents.impl.stores.StoreUtil - Save settings failed 
java.lang.RuntimeException: java.lang.Exception: Cannot get TyporaSetting component state
    at com.intellij.util.ExceptionUtil.rethrow(ExceptionUtil.java:160)
    at com.intellij.util.lang.CompoundRuntimeException.throwIfNotEmpty(CompoundRuntimeException.java:153)
    at com.intellij.configurationStore.ComponentStoreImpl.save(ComponentStoreImpl.kt:149)
    at com.intellij.openapi.components.impl.stores.StoreUtil.save(StoreUtil.java:40)
    at com.intellij.openapi.application.impl.ApplicationImpl.saveSettings(ApplicationImpl.java:1432)
    at com.intellij.openapi.components.impl.stores.StoreUtil.saveProjectsAndApp(StoreUtil.java:120)
    at com.intellij.openapi.components.impl.stores.StoreUtil.saveDocumentsAndProjectsAndApp(StoreUtil.java:113)
    at com.intellij.openapi.application.impl.ApplicationImpl.saveAll(ApplicationImpl.java:1441)
    at com.intellij.ide.SaveAndSyncHandlerImpl.saveProjectsAndDocuments(SaveAndSyncHandlerImpl.java:126)
    at com.intellij.ide.SaveAndSyncHandlerImpl$2.lambda$onFrameDeactivated$0(SaveAndSyncHandlerImpl.java:94)
    at com.intellij.openapi.application.TransactionGuardImpl.runSyncTransaction(TransactionGuardImpl.java:88)
    at com.intellij.openapi.application.TransactionGuardImpl.lambda$submitTransaction$1(TransactionGuardImpl.java:111)
    at com.intellij.openapi.application.TransactionGuardImpl.submitTransaction(TransactionGuardImpl.java:120)
    at com.intellij.openapi.application.TransactionGuard.submitTransaction(TransactionGuard.java:122)
    at com.intellij.ide.SaveAndSyncHandlerImpl$2.onFrameDeactivated(SaveAndSyncHandlerImpl.java:92)
    at com.intellij.ide.FrameStateManagerImpl.fireDeactivationEvent(FrameStateManagerImpl.java:86)
    at com.intellij.ide.FrameStateManagerImpl.access$500(FrameStateManagerImpl.java:32)
    at com.intellij.ide.FrameStateManagerImpl$2.lambda$applicationDeactivated$0(FrameStateManagerImpl.java:72)
    at com.intellij.util.concurrency.QueueProcessor.runSafely(QueueProcessor.java:232)
    at com.intellij.util.Alarm$Request.runSafely(Alarm.java:405)
    at com.intellij.util.Alarm$Request.access$700(Alarm.java:330)
    at com.intellij.util.Alarm$Request$1.run(Alarm.java:371)
    at com.intellij.openapi.application.TransactionGuardImpl$2.run(TransactionGuardImpl.java:315)
    at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.doRun(LaterInvocator.java:447)
    at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.runNextEvent(LaterInvocator.java:431)
    at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.run(LaterInvocator.java:415)
    at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:762)
    at java.awt.EventQueue.access$500(EventQueue.java:98)
    at java.awt.EventQueue$3.run(EventQueue.java:715)
    at java.awt.EventQueue$3.run(EventQueue.java:709)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:732)
    at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:781)
    at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:722)
    at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:382)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
Caused by: java.lang.Exception: Cannot get TyporaSetting component state
    at com.intellij.configurationStore.ComponentStoreImpl.doSaveComponents(ComponentStoreImpl.kt:202)
    at com.intellij.configurationStore.ComponentStoreImpl.save(ComponentStoreImpl.kt:134)
    ... 40 more
Caused by: java.lang.NullPointerException: Can not set a null value for an Attribute
    at org.jdom.Attribute.setValue(Attribute.java:482)
    at org.jdom.Attribute.<init>(Attribute.java:221)
    at org.jdom.Attribute.<init>(Attribute.java:244)
    at org.jdom.Element.setAttribute(Element.java:1302)
    at com.wuhulala.intellij.plugins.TyporaSetting.getState(TyporaSetting.java:39)
    at com.wuhulala.intellij.plugins.TyporaSetting.getState(TyporaSetting.java:11)
    at com.intellij.configurationStore.ComponentStoreImpl.commitComponent(ComponentStoreImpl.kt:249)
    at com.intellij.configurationStore.ComponentStoreImpl.doSaveComponents(ComponentStoreImpl.kt:198)
    ... 41 more

3.Cannot get TyporaSetting component state  主要是这句，提醒了我，Typora是前几天安装的MarkDown插件，然后每次保存就报这个错

把这个插件卸载了就不报错了，每个人报错原因都不同，我是因为插件，具体得看看日志