android studio 经常用着用着就报错，不知道什么情况？

Question

java.lang.RuntimeException: java.io.EOFException
at com.intellij.util.ExceptionUtilRt.rethrow(ExceptionUtilRt.java:31)
at com.intellij.util.ExceptionUtil.rethrow(ExceptionUtil.java:120)
at com.intellij.openapi.vfs.newvfs.persistent.FSRecords$DbConnection.handleError(FSRecords.java:535)
at com.intellij.openapi.vfs.newvfs.persistent.FSRecords$DbConnection.access$000(FSRecords.java:160)
at com.intellij.openapi.vfs.newvfs.persistent.FSRecords.readContent(FSRecords.java:1251)
at com.intellij.openapi.vfs.newvfs.persistent.PersistentFSImpl.readContent(PersistentFSImpl.java:230)
at com.intellij.openapi.vfs.newvfs.persistent.PersistentFSImpl.contentsToByteArray(PersistentFSImpl.java:492)
at com.intellij.openapi.vfs.newvfs.impl.VirtualFileImpl.contentsToByteArray(VirtualFileImpl.java:139)
at com.intellij.openapi.vfs.newvfs.impl.VirtualFileImpl.contentsToByteArray(VirtualFileImpl.java:130)
at com.intellij.openapi.fileEditor.impl.FileDocumentManagerImpl.isSaveNeeded(FileDocumentManagerImpl.java:463)
at com.intellij.openapi.fileEditor.impl.FileDocumentManagerImpl.doSaveDocumentInWriteAction(FileDocumentManagerImpl.java:406)
at com.intellij.openapi.fileEditor.impl.FileDocumentManagerImpl.lambda$doSaveDocument$2(FileDocumentManagerImpl.java:384)
at com.intellij.openapi.application.WriteAction.run(WriteAction.java:106)
at com.intellij.openapi.fileEditor.impl.FileDocumentManagerImpl.doSaveDocument(FileDocumentManagerImpl.java:384)
at com.intellij.openapi.fileEditor.impl.FileDocumentManagerImpl.saveAllDocuments(FileDocumentManagerImpl.java:304)
at com.intellij.openapi.fileEditor.impl.FileDocumentManagerImpl.saveAllDocuments(FileDocumentManagerImpl.java:282)
at com.intellij.openapi.components.impl.stores.StoreUtil.saveDocumentsAndProjectsAndApp(StoreUtil.java:105)
at com.intellij.openapi.application.impl.ApplicationImpl.saveAll(ApplicationImpl.java:1454)
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:71)
at com.intellij.ide.FrameStateManagerImpl.access$300(FrameStateManagerImpl.java:31)
at com.intellij.ide.FrameStateManagerImpl$2.applicationDeactivated(FrameStateManagerImpl.java:58)
at sun.reflect.GeneratedMethodAccessor346.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.intellij.util.messages.impl.MessageBusConnectionImpl.deliverMessage(MessageBusConnectionImpl.java:117)
at com.intellij.util.messages.impl.MessageBusImpl.doPumpMessages(MessageBusImpl.java:397)
at com.intellij.util.messages.impl.MessageBusImpl.pumpWaitingBuses(MessageBusImpl.java:358)
at com.intellij.util.messages.impl.MessageBusImpl.pumpMessages(MessageBusImpl.java:347)
at com.intellij.util.messages.impl.MessageBusImpl.sendMessage(MessageBusImpl.java:324)
at com.intellij.util.messages.impl.MessageBusImpl.access$200(MessageBusImpl.java:29)
at com.intellij.util.messages.impl.MessageBusImpl$2.invoke(MessageBusImpl.java:196)
at com.sun.proxy.$Proxy91.applicationDeactivated(Unknown Source)
at com.intellij.ide.ApplicationActivationStateManager.updateState(ApplicationActivationStateManager.java:80)
at com.intellij.ide.IdeEventQueue.processAppActivationEvents(IdeEventQueue.java:721)
at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:593)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:391)
at java.awt.SentEvent.dispatch(SentEvent.java:70)
at java.awt.DefaultKeyboardFocusManager$DefaultKeyboardFocusManagerSentEvent.dispatch(DefaultKeyboardFocusManager.java:217)
at java.awt.DefaultKeyboardFocusManager.sendMessage(DefaultKeyboardFocusManager.java:244)
at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:755)
at com.intellij.ide.IdeKeyboardFocusManager.dispatchEvent(IdeKeyboardFocusManager.java:27)
at java.awt.Component.dispatchEventImpl(Component.java:4774)
at java.awt.Container.dispatchEventImpl(Container.java:2295)
at java.awt.Window.dispatchEventImpl(Window.java:2746)
at java.awt.Component.dispatchEvent(Component.java:4725)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:764)
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.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:90)
at java.awt.EventQueue$4.run(EventQueue.java:737)
at java.awt.EventQueue$4.run(EventQueue.java:735)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:734)
at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:755)
at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:704)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:391)
at java.awt.SequencedEvent.dispatch(SequencedEvent.java:128)
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.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:90)
at java.awt.EventQueue$4.run(EventQueue.java:737)
at java.awt.EventQueue$4.run(EventQueue.java:735)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:734)
at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:755)
at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:704)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:391)
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.io.EOFException
at com.intellij.util.io.storage.RefCountingStorage$CustomInflaterInputStream.fill(RefCountingStorage.java:111)
at java.util.zip.InflaterInputStream.read(InflaterInputStream.java:158)
at java.io.FilterInputStream.read(FilterInputStream.java:107)
at com.intellij.openapi.util.io.StreamUtil.copyStreamContent(StreamUtil.java:44)
at com.intellij.util.io.storage.RefCountingStorage.internalReadStream(RefCountingStorage.java:93)
at com.intellij.util.io.storage.RefCountingStorage.readStream(RefCountingStorage.java:72)
at com.intellij.openapi.vfs.newvfs.persistent.FSRecords.doReadContentById(FSRecords.java:1269)
at com.intellij.openapi.vfs.newvfs.persistent.FSRecords.readContent(FSRecords.java:1245)
... 84 more
重启工具就没事了，但是用个几个小时又会报同样的错，报错后android studio就不能用了且报错前一会儿写的代码也不会保存。