java.lang.NoSuchFieldError：completementKey

Question

當我嘗試啟動Derby Network Server時，出現此異常。 這從來沒有發生過，我現在也不是問題的原因了。 有任何想法嗎？

Exception in thread "main" java.lang.NoSuchFieldError: completionKey
at sun.nio.fs.WindowsNativeDispatcher.initIDs(Native Method)
at sun.nio.fs.WindowsNativeDispatcher.<clinit>(Unknown Source)
at sun.nio.fs.WindowsLinkSupport.getRealPath(Unknown Source)
at sun.nio.fs.WindowsPath.toRealPath(Unknown Source)
at sun.nio.fs.WindowsPath.toRealPath(Unknown Source)
at sun.util.calendar.ZoneInfoFile$1.run(Unknown Source)
at sun.util.calendar.ZoneInfoFile$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.util.calendar.ZoneInfoFile.<clinit>(Unknown Source)
at sun.util.calendar.ZoneInfo.getTimeZone(Unknown Source)
at java.util.TimeZone.getTimeZone(Unknown Source)
at java.util.TimeZone.setDefaultZone(Unknown Source)
at java.util.TimeZone.getDefaultRef(Unknown Source)
at java.util.TimeZone.getDefault(Unknown Source)
at java.text.SimpleDateFormat.initializeCalendar(Unknown Source)
at java.text.SimpleDateFormat.<init>(Unknown Source)
at java.text.DateFormat.get(Unknown Source)
at java.text.DateFormat.getDateInstance(Unknown Source)
at org.apache.derby.iapi.tools.i18n.LocalizedResource.init(Unknown Source)
at org.apache.derby.iapi.tools.i18n.LocalizedResource.<init>(Unknown Source)
at org.apache.derby.impl.drda.NetworkServerControlImpl.init(Unknown Source)
at org.apache.derby.impl.drda.NetworkServerControlImpl.<init>(Unknown Source)
at org.apache.derby.drda.NetworkServerControl.main(Unknown Source)

Answer 1

這是一個錯誤（！），這是由於運行的代碼是針對具有一個字段的類而編譯的，而又是通過另一個沒有該字段的（已編譯）版本執行的。

返回並檢查已安裝的版本，重新編譯所有內容，等等。等等-