Server continuously crashing without warning or feedback. How can I fix this?

[redactedunicorn]

My server is on the Free plan (for now) and every time people are online, it crashes without warning. One of the plugins we have is DiscordSRV, and usually when the server shuts down it says that in the channel we have for it, but it doesn't with these unusual crashes.
Usually, the server is 100% lagless, and no lag occurs before crashes.
It often does this multiple times in a two hour session, forcing us to restart the server and wait for a few minutes, often rolling back a few minutes of progress.
While this problem isn't crippling, it is problematic.
Plugin list:
BuycraftX, ChatReaction, Citizens, CubCustomDrops, DiscordSRV, Essentials, HolographicDisplays, ItemEditor, LibsDisguises, MythicDrops, MythicMobs, ProtocolLib, Sentinel, Shopkeepers, SkBee, Skellett, SkQuery, skRayFall, Skript, Tradeplus, ViaVersion, Worldedit.

[Pryzmm]

21 hours ago, redactedunicorn said:

My server is on the Free plan (for now) and every time people are online, it crashes without warning. One of the plugins we have is DiscordSRV, and usually when the server shuts down it says that in the channel we have for it, but it doesn't with these unusual crashes.
Usually, the server is 100% lagless, and no lag occurs before crashes.
It often does this multiple times in a two hour session, forcing us to restart the server and wait for a few minutes, often rolling back a few minutes of progress.
While this problem isn't crippling, it is problematic.
Plugin list:
BuycraftX, ChatReaction, Citizens, CubCustomDrops, DiscordSRV, Essentials, HolographicDisplays, ItemEditor, LibsDisguises, MythicDrops, MythicMobs, ProtocolLib, Sentinel, Shopkeepers, SkBee, Skellett, SkQuery, skRayFall, Skript, Tradeplus, ViaVersion, Worldedit.

Send in your server logs when it crashes

[redactedunicorn]

edit bc i forgot to quote

Edited January 10, 2022 by redactedunicorn
forgot to quote, resending message in new - quoted - reply

[redactedunicorn]

On 1/6/2022 at 8:15 AM, AgentGamerPro said:

Send in your server logs when it crashes

[Mon, 10. Jan 2022 11:25:03 GMT INFO] [World Builder] alarmedclock: the anvils arent falling on me anymore
[Mon, 10. Jan 2022 11:25:04 GMT INFO] [Code Man] LunarDragon: rip alex
[Mon, 10. Jan 2022 11:25:04 GMT INFO] Toastryy issued server command: /tp LunarDragon
[Mon, 10. Jan 2022 11:25:05 GMT INFO] [World Builder] alarmedclock: wtf
[Mon, 10. Jan 2022 11:25:07 GMT INFO] [Tester] greenbuster28: what happens if u die
[9:25 PM]
[Mon, 10. Jan 2022 11:25:10 GMT INFO] [World Builder] alarmedclock: help
[Mon, 10. Jan 2022 11:25:11 GMT INFO] [Code Man] LunarDragon: gg
[9:25 PM]
[Mon, 10. Jan 2022 11:25:12 GMT INFO] [Tester] Charlitan12: do i win
[Mon, 10. Jan 2022 11:25:13 GMT INFO] [Code Man] LunarDragon: u win
[Mon, 10. Jan 2022 11:25:15 GMT INFO] Gave 1 [Basic Token] to Alexjusjosh0
[Mon, 10. Jan 2022 11:25:17 GMT INFO] [Tester] Charlitan12: swag
[9:25 PM]
[Mon, 10. Jan 2022 11:25:18 GMT INFO] [World Builder] alarmedclock: lunar i win
[Mon, 10. Jan 2022 11:25:19 GMT INFO] Toastryy issued server command: /creative
[Mon, 10. Jan 2022 11:25:19 GMT INFO] [Tester] greenbuster28: lie
[Mon, 10. Jan 2022 11:25:20 GMT INFO] [World Builder] alarmedclock: im in a hole
[Mon, 10. Jan 2022 11:25:21 GMT INFO] [Tester] Alexjusjosh0: no bruh I WOULDVE WON IF I WASNT HIT BY TRIDENT
[9:25 PM]
[Mon, 10. Jan 2022 11:25:24 GMT INFO] [World Builder] alarmedclock: help
[9:25 PM]
[Mon, 10. Jan 2022 11:25:30 GMT INFO] [] alarmedclock was impaled by Toastryy [10]
[9:25 PM]
[Mon, 10. Jan 2022 11:25:36 GMT INFO] [World Builder] alarmedclock: PVPPVPVPVPPVPVPVPVPVP
[9:25 PM]
[Mon, 10. Jan 2022 11:25:38 GMT INFO] alarmedclock issued server command: /tp me toa
[9:25 PM]
[Mon, 10. Jan 2022 11:25:43 GMT INFO] [World Builder] alarmedclock: PCPCPVPVPVPVpvpVPVPvPpVppv
[Mon, 10. Jan 2022 11:25:44 GMT INFO] [Code Man] LunarDragon: pvp is allowed again

Not sure how to format as anything else, so it's bold.
These are the logs 30 seconds before a crash.
As you can see, no feedback appeared - the server just stopped.
It was perfectly normal chatting, gameplay, whatever, before it just stopped and kicked us all to the lobby.

[redactedunicorn]

It happened again!

/home/minecraft/signal/start_cmd: line 1: 13289 Killed                  /opt/java/17/bin/java -Xmx${SERVER_RAM} -XX:+ParallelRefProcEnabled -XX:MaxGCPauseMillis=200 -XX:+UnlockExperimentalVMOptions -XX:+DisableExplicitGC -XX:+AlwaysPreTouch -XX:G1NewSizePercent=30 -XX:G1MaxNewSizePercent=40 -XX:G1HeapRegionSize=8M -XX:G1ReservePercent=20 -XX:G1HeapWastePercent=5 -XX:G1MixedGCCountTarget=4 -XX:InitiatingHeapOccupancyPercent=15 -XX:G1MixedGCLiveThresholdPercent=90 -XX:G1RSetUpdatingPauseTimePercent=5 -XX:SurvivorRatio=32 -XX:+PerfDisableSharedMem -XX:MaxTenuringThreshold=1 -DIReallyKnowWhatIAmDoingISwear -Djline.terminal=jline.UnsupportedTerminal -Dlog4j2.formatMsgNoLookups=true -jar server.jar

I have no idea what this line means, but it appears i missed it before because I started the server before sending the logs.
However, that's what came up on crash.

Edited January 10, 2022 by redactedunicorn