Having similar issues with just 2 players on the realm. This is especially noticeable with the elytra, chunks fail to render and you can see through the surface. The random deaths while using elytra because I flew into an unloaded mountain is extremely frustrating. It is getting to the point of unusable.
I am seeing this error in the snapshot 20w19a
This is still an issue for me with server version 20w14a. If I downgrade the server snapshot to 20w13b it does work. Using 20w16a gives me the same error.
[00:20:02] [main/FATAL]: Failed to start the minecraft server
java.io.IOException: No such file or directory
at sun.nio.ch.FileKey.init(Native Method) ~[?:?]
at sun.nio.ch.FileKey.create(FileKey.java:43) ~[?:?]
at sun.nio.ch.FileLockTable.<init>(FileLockTable.java:90) ~[?:?]
at sun.nio.ch.FileChannelImpl.fileLockTable(FileChannelImpl.java:1089) ~[?:?]
at sun.nio.ch.FileChannelImpl.tryLock(FileChannelImpl.java:1153) ~[?:?]
at java.nio.channels.FileChannel.tryLock(FileChannel.java:1165) ~[?:?]
at adc.a(SourceFile:27) ~[server.jar:?]
at czq$a.<init>(SourceFile:200) ~[server.jar:?]
at czq.c(SourceFile:188) ~[server.jar:?]
at net.minecraft.server.MinecraftServer.main(SourceFile:988) [server.jar:?]
I tried a couple versions of java and got the exact same error:
openjdk version "1.8.0_252"
OpenJDK Runtime Environment (build 1.8.0_252-8u252-b09-1~18.04-b09)
OpenJDK 64-Bit Server VM (build 25.252-b09, mixed mode)
openjdk version "11.0.7" 2020-04-14
OpenJDK Runtime Environment (build 11.0.7+10-post-Ubuntu-2ubuntu218.04)
OpenJDK 64-Bit Server VM (build 11.0.7+10-post-Ubuntu-2ubuntu218.04, mixed mode, sharing)
It would be nice if we could at least get some feedback on this. I am paying for 2 realms, The one I play on is nearly impossible to fly with an elytra, and the block lag is extremely frustrating. It looks like I will also have to cancel myu realm and move to locally hosted. I would run a server here at the house, but I play with my kids and one of them only has an xbox. Kinda just screwed all the way around. It's really unfortunate, we love playing.