Note: if you have a 1.9.2 server it works but you can't download it
if u played a 1.9 map on a personal server and then updated the server to 1.9.4 you can't play it that's basiclly it
the log: [15:47:26] [Server thread/INFO]: Starting minecraft server version 1.9.4
[15:47:26] [Server thread/WARN]: To start the server with more ram, launch it as "java -Xmx1024M -Xms1024M -jar minecraft_server.jar"
[15:47:26] [Server thread/INFO]: Loading properties
[15:47:26] [Server console handler/ERROR]: Exception handling console input
java.io.IOException: Referensen (handle) är felaktig
at java.io.FileInputStream.readBytes(Native Method) ~[?:1.8.0_77]
at java.io.FileInputStream.read(Unknown Source) ~[?:1.8.0_77]
at java.io.BufferedInputStream.read1(Unknown Source) ~[?:1.8.0_77]
at

Note: it is a way around it but then you need a 1.9.2 server