房间数据库引发CursorWindowAllocationException

我无法找出这个例外的原因。这是stacktrace:

Fatal Exception: android.database.CursorWindowAllocationException: Cursor window allocation of 2048 kb failed. 
   at android.database.CursorWindow.(CursorWindow.java:108)
   at android.database.AbstractWindowedCursor.clearOrCreateWindow(AbstractWindowedCursor.java:226)
   at android.database.sqlite.SQLiteCursor.fillWindow(SQLiteCursor.java:148)
   at android.database.sqlite.SQLiteCursor.getCount(SQLiteCursor.java:142)
   at android.database.AbstractCursor.moveToPosition(AbstractCursor.java:219)
   at android.database.AbstractCursor.moveToNext(AbstractCursor.java:268)
   at android.arch.persistence.room.InvalidationTracker$1.checkUpdatedTable(InvalidationTracker.java:358)
   at android.arch.persistence.room.InvalidationTracker$1.run(InvalidationTracker.java:329)
   at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162)
   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636)
   at java.lang.Thread.run(Thread.java:764)

以下是查询:

    @Query("select * from PhoneEvent where event_type=:type and 
    client_created_timestamp>=:startTimestamp and 
    client_created_timestamp<:endTimestamp")
    List<PhoneEvent> getAllPhoneEventsOfTypeAndBetween(String type, 
    long startTimestamp, long endTimestamp);

    final List<PhoneEvent> _result = new ArrayList<PhoneEvent>(_cursor.getCount());