求万能的吧友们帮帮
java.io.IOException: 句柄无效。
at java.io.FileInputStream.readBytes(Native Method) ~[?:1.8.0_411]
at java.io.FileInputStream.read(Unknown Source) ~[?:1.8.0_411]
at java.io.BufferedInputStream.read1(Unknown Source) ~[?:1.8.0_411]
at java.io.BufferedInputStream.read(Unknown Source) ~[?:1.8.0_411]
at sun.nio.cs.StreamDecoder.readBytes(Unknown Source) ~[?:1.8.0_411]
at sun.nio.cs.StreamDecoder.implRead(Unknown Source) ~[?:1.8.0_411]
at sun.nio.cs.StreamDecoder.read(Unknown Source) ~[?:1.8.0_411]
at java.io.InputStreamReader.read(Unknown Source) ~[?:1.8.0_411]
at java.io.BufferedReader.fill(Unknown Source) ~[?:1.8.0_411]
at java.io.BufferedReader.readLine(Unknown Source) ~[?:1.8.0_411]
at java.io.BufferedReader.readLine(Unknown Source) ~[?:1.8.0_411]
at nz$2.run(SourceFile:100) [minecraft_server.1.12.2.jar:?]
现在开服生成世界是平原，而且之前存档的东西全部消失，实在是不知道怎么办了