Modded Server Crashing with multiple players and Rollbacks

Have no clue what to do to fix this

we have 16gb of ram for the server

After this log the image above is what happened

so as soon as a player joined the server died

java -Xms10000M -XX:MaxRAMPercentage=90.0 --add-modules=jdk.incubator.vector -XX:+UseG1GC -XX:+ParallelRefProcEnabled -XX:MaxGCPauseMillis=200 -XX:+UnlockExperimentalVMOptions -XX:+DisableExplicitGC -XX:+AlwaysPreTouch -XX:G1HeapWastePercent=5 -XX:G1MixedGCCountTarget=4 -XX:InitiatingHeapOccupancyPercent=15 -XX:G1MixedGCLiveThresholdPercent=90 -XX:G1RSetUpdatingPauseTimePercent=5 -XX:SurvivorRatio=32 -XX:+PerfDisableSharedMem -XX:MaxTenuringThreshold=1 -Dusing.aikars.flags=https://mcflags.emc.gs/ -Daikars.new.flags=true -XX:G1NewSizePercent=40 -XX:G1MaxNewSizePercent=50 -XX:G1HeapRegionSize=16M -XX:G1ReservePercent=15 -jar server.jar

^ Start up flag

how are you hosting this?

don't post screenshots of a spark. post the ACTUAL spark.

wdym?

How much ram did your host give you?
I highly suspect it might be related to you using -Xms instead of -Xmx

what's the difference between xms and xmx?

Xms = minimum heap
Xmx = maximum heap

If your host gave you 8gb of ram, Xmx has to be lower than that, around 7.5gb at the very least

we have 16gb

Try using -Xmx15360M

Okay I'll have to wait for my host, I'll keep you updated