So, I am running a personal server for me and my friends and I am experiencing frequent crashes even when nobody's online. The minecraft server is running on a ssd, i5 4460 and 6 gigs of ram. Even though I am running spigot this was happening with vanilla too.

Attached logs:

[17:09:36] [Server console handler/ERROR]: Exception handling console input
java.io.IOException: Input/output error
at java.io.FileInputStream.readBytes(Native Method) ~[?:1.8.0_282]
at java.io.FileInputStream.read(FileInputStream.java:255) ~[?:1.8.0_282]
at java.io.BufferedInputStream.fill(BufferedInputStream.java:246) ~[?:1.8.0_282]
at java.io.BufferedInputStream.read(BufferedInputStream.java:265) ~[?:1.8.0_282]
at org.bukkit.craftbukkit.libs.jline.internal.NonBlockingInputStream.read(NonBlockingInputStream.java:169) ~[spigot-1.16.5.jar:3029-Spigot-79d53c2-e9ad7cb]
at org.bukkit.craftbukkit.libs.jline.internal.NonBlockingInputStream.read(NonBlockingInputStream.java:137) ~[spigot-1.16.5.jar:3029-Spigot-79d53c2-e9ad7cb]
at org.bukkit.craftbukkit.libs.jline.internal.NonBlockingInputStream.read(NonBlockingInputStream.java:246) ~[spigot-1.16.5.jar:3029-Spigot-79d53c2-e9ad7cb]
at org.bukkit.craftbukkit.libs.jline.internal.InputStreamReader.read(InputStreamReader.java:261) ~[spigot-1.16.5.jar:3029-Spigot-79d53c2-e9ad7cb]
at org.bukkit.craftbukkit.libs.jline.internal.InputStreamReader.read(InputStreamReader.java:198) ~[spigot-1.16.5.jar:3029-Spigot-79d53c2-e9ad7cb]
at org.bukkit.craftbukkit.libs.jline.console.ConsoleReader.readCharacter(ConsoleReader.java:2145) ~[spigot-1.16.5.jar:3029-Spigot-79d53c2-e9ad7cb]
at org.bukkit.craftbukkit.libs.jline.console.ConsoleReader.readLine(ConsoleReader.java:2349) ~[spigot-1.16.5.jar:3029-Spigot-79d53c2-e9ad7cb]
at net.minecraft.server.v1_16_R3.DedicatedServer$1.run(DedicatedServer.java:120) [spigot-1.16.5.jar:3029-Spigot-79d53c2-e9ad7cb]
[17:09:36] [Thread-3/INFO]: Stopping server