Upon starting a new dedicated server, the world is generated but crashes shortly after a connection attempt with:
A single server tick took 240.00 seconds (should be max 0.05)(I increased the max tick time from 60 seconds to 240 seconds just in case, but it didn't help)
I can reproduce this issue every time when I use a seed of 8675309. Changing the seed did seem to help.
Environment
Minecraft Version: 21w05a
Minecraft Version ID: 21w05a
Operating System: Linux (amd64) version 4.15.0-117-generic
Java Version: 11.0.9.1, Ubuntu
Java VM Version: OpenJDK 64-Bit Server VM (mixed mode, sharing), Ubuntu
Memory: 2230357976 bytes (2127 MB) / 2621440000 bytes (2500 MB) up to 2621440000 bytes (2500 MB)
CPUs: 4
JVM Flags: 2 total; -Xms2500M -Xmx2500M
Player Count: 1 / 20; [aaw['<redacted>'/316, l='ServerLevel[world]', x=-165.50, y=63.00, z=-242.50]]
Data Packs: vanilla
Is Modded: Unknown (can't tell)
Type: Dedicated Server (map_server.txt)
Duplicate of MC-213788. Please add any information you have to that report.