Exopandora

I also faced this issue on my server. It is caused by constantly loaded minecarts (in spawn chunks for example).

Technical explanation:

The problem is that movement updates of minecarts are being appended to a list (Entity.movementThisTick) each tick, but they are never processed or cleared. This results in ever-increasing memory usage of minecarts that are loaded for a longer time periods, eventually causing the jvm to run out of memory. The issue was introduced somewhere in the snapshot cycle of 1.21.4 to 1.21.5. Here is some pseudocode explaining the issue (using official mappings):

class Entity {
	private List movementThisTick;
	
	void move() {
		// appends new entries to movementThisTick
	}
	
	void applyEffectsFromBlocks() {
		// clears movementThisTick
	}
	
	void applyEffectsFromBlocks(Vec3, Vec3) {
		// does not clear movementThisTick
	}
}

class AbstractMinecart extends Entity {
	override void move() {
		if (legacy movement) {
			super.move()
			this.applyEffectsFromBlocks()
		} else {
			// experimental movement code
		}
	}

	override void applyEffectsFromBlocks() {
		if (legacy movement) {
			super.applyEffectsFromBlocks(vec, vec)
		} else {
			super.applyEffectsFromBlocks()
		}
	}
}

Destroying or unloading the minecart will release the list for garbage collection. The more minecarts are loaded, the faster the memory will fill up, since the problem is per entity instance.

Suggested fix:

Insert a call to this.removeLatestMovementRecordingBatch() in method applyEffectsFromBlocks()of AbstractMinecart after super.applyEffectsFromBlocks(vec, vec):

class AbstractMinecart extends Entity {
    override void applyEffectsFromBlocks() {
	    if (legacy movement) {
		    super.applyEffectsFromBlocks(vec, vec)
+		    this.removeLatestMovementRecordingBatch()
	    } else {
		    super.applyEffectsFromBlocks()
		}
	}
}

This removes the latest movement update batch that got added by Entity.move(). This should be fine because the updates are not used by the legacy minecart movement code anyway.

I made a simple fabric mod to fix the issue: https://github.com/Exopandora/MinecartMemoryLeakFix

They should

/give YOURNAME minecraft:diamond_sword 1 0 {
display:{
Name: "{text:\"TEST\",color:gold,bold:false,strikethrough:false,underlined:false,italic:false}"
}
}

also tried:

/give YOURNAME minecraft:diamond_sword 1 0 {
display:{
Name: "\"{text:\"TEST\",color:gold,bold:false,strikethrough:false,underlined:false,italic:false}"\"
}
}

and:

/give YOURNAME minecraft:diamond_sword 1 0 {
display:{
Name: "\"{text:\\\"TEST\\\",color:gold,bold:false,strikethrough:false,underlined:false,italic:false}"\"
}
}

oh i forgot the sell tag but when i tested it, it worked and why in the tag tag ? If you give yourswlf a head you dont have to type it.

Yes thats true
I added a health scoreboard too
thanks for the help- Server now works

May has to do with the word and the beacon placed last session

Console:

[INFO] Starting minecraft server version 13w19a
 [INFO] Loading properties
 [INFO] Default game type: SURVIVAL
 [INFO] Generating keypair
 [INFO] Starting Minecraft server on *:25565
 [WARNING] **** SERVER IS RUNNING IN OFFLINE/INSECURE MODE!
 [WARNING] The server will make no attempt to authenticate usernames. Beware.
 [WARNING] While this makes the game possible to play without internet access, it also opens up the ability for hackers to connect with any username they choose.
 [WARNING] To change this, set "online-mode" to "true" in the server.properties file.
 [INFO] Preparing level "world"
 [INFO] Preparing start region for level 0
 [INFO] Preparing spawn area: 96%
 [INFO] Done (1,177s)! For help, type "help" or "?"
 [SEVERE] Reached end of stream
 [SEVERE] Reached end of stream
 [SEVERE] Reached end of stream
 [SEVERE] Reached end of stream
 [SEVERE] Reached end of stream
 [SEVERE] Reached end of stream
 [SEVERE] Reached end of stream
 [INFO] Exopandora[/127.0.0.1:62380] logged in with entity id 305 at (-47.16904940416364, 74.0, -243.90474031344291)
 [INFO] Exopandora lost connection: disconnect.genericReason
 [INFO] Exopandora lost connection: disconnect.genericReason

Launcher:

Launcher 0.8 (Dev) (through bootstrap 2) started on windows...
System.getProperty('os.name') == 'Windows 8'
System.getProperty('os.version') == '6.2'
System.getProperty('os.arch') == 'amd64'
System.getProperty('java.version') == '1.7.0_13'
System.getProperty('java.vendor') == 'Oracle Corporation'
Loaded 1 profile(s); selected '(Default)'
Going to log in with legacy stored username & password...
Trying to log in...
Delta time to compare resources: 488 ms 
Download job 'Resources' skipped as there are no files to download
Job 'Resources' finished successfully
Logged in successfully
Getting syncinfo for selected version
Queueing library & version downloads
Download job 'Version & Libraries' started (8 threads, 1 files)
Finished downloading C:\Users\Marcel\AppData\Roaming\.minecraft\versions\13w19a\13w19a.jar for job 'Version & Libraries': Used own copy as it matched etag
Job 'Version & Libraries' finished successfully
Launching game
Unpacking natives to C:\Users\Marcel\AppData\Roaming\.minecraft\versions\13w19a\13w19a-natives-160806205584857
Launching in C:\Users\Marcel\AppData\Roaming\.minecraft
Running: "C:\Program Files\Java\jre7\bin\javaw.exe" -Xmx1G -Djava.library.path=C:\Users\Marcel\AppData\Roaming\.minecraft\versions\13w19a\13w19a-natives-160806205584857 -cp C:\Users\Marcel\AppData\Roaming\.minecraft\libraries\net\sf\jopt-simple\jopt-simple\4.4\jopt-simple-4.4.jar;C:\Users\Marcel\AppData\Roaming\.minecraft\libraries\com\paulscode\codecjorbis\20101023\codecjorbis-20101023.jar;C:\Users\Marcel\AppData\Roaming\.minecraft\libraries\com\paulscode\codecwav\20101023\codecwav-20101023.jar;C:\Users\Marcel\AppData\Roaming\.minecraft\libraries\com\paulscode\libraryjavasound\20101123\libraryjavasound-20101123.jar;C:\Users\Marcel\AppData\Roaming\.minecraft\libraries\com\paulscode\librarylwjglopenal\20100824\librarylwjglopenal-20100824.jar;C:\Users\Marcel\AppData\Roaming\.minecraft\libraries\com\paulscode\soundsystem\20120107\soundsystem-20120107.jar;C:\Users\Marcel\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl\2.9.0\lwjgl-2.9.0.jar;C:\Users\Marcel\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl_util\2.9.0\lwjgl_util-2.9.0.jar;C:\Users\Marcel\AppData\Roaming\.minecraft\libraries\argo\argo\2.25_fixed\argo-2.25_fixed.jar;C:\Users\Marcel\AppData\Roaming\.minecraft\libraries\org\bouncycastle\bcprov-jdk15on\1.47\bcprov-jdk15on-1.47.jar;C:\Users\Marcel\AppData\Roaming\.minecraft\libraries\com\google\guava\guava\14.0\guava-14.0.jar;C:\Users\Marcel\AppData\Roaming\.minecraft\libraries\org\apache\commons\commons-lang3\3.1\commons-lang3-3.1.jar;C:\Users\Marcel\AppData\Roaming\.minecraft\libraries\commons-io\commons-io\2.4\commons-io-2.4.jar;C:\Users\Marcel\AppData\Roaming\.minecraft\libraries\net\java\jinput\jinput\2.0.5\jinput-2.0.5.jar;C:\Users\Marcel\AppData\Roaming\.minecraft\libraries\net\java\jutils\jutils\1.0.0\jutils-1.0.0.jar;C:\Users\Marcel\AppData\Roaming\.minecraft\versions\13w19a\13w19a.jar net.minecraft.client.main.Main --username Exopandora --session 1579911015587255024 --workDir C:\Users\Marcel\AppData\Roaming\.minecraft
---- YOU CAN CLOSE THIS LAUNCHER IF THE GAME STARTED OK ----
---- YOU CAN CLOSE THIS LAUNCHER IF THE GAME STARTED OK ----
---- YOU CAN CLOSE THIS LAUNCHER IF THE GAME STARTED OK ----
---- (We'll do this automatically later ;D) ----
Client> 265 recipes
Client> 27 achievements
Client> 2013-05-21 14:20:17 [CLIENT] [INFO] Setting user: Exopandora
Client> 2013-05-21 14:20:17 [CLIENT] [INFO] (Session ID is 1579911015587255024)
Client> 2013-05-21 14:20:17 [CLIENT] [INFO] LWJGL Version: 2.9.0
Client> 16843169 is not a valid stat, creating place-holder
Client> 16843168 is not a valid stat, creating place-holder
Client> 
Client> Starting up SoundSystem...
Client> Initializing LWJGL OpenAL
Client>     (The LWJGL binding of OpenAL.  For more information, see http://www.lwjgl.org)
Client> OpenAL initialized.
Client> 
Client> 2013-05-21 14:20:20 [CLIENT] [INFO] Found animation info for: textures/blocks/lava_flow.txt
Client> 2013-05-21 14:20:20 [CLIENT] [INFO] Found animation info for: textures/blocks/water_flow.txt
Client> 2013-05-21 14:20:20 [CLIENT] [INFO] Found animation info for: textures/blocks/fire_0.txt
Client> 2013-05-21 14:20:20 [CLIENT] [INFO] Found animation info for: textures/blocks/fire_1.txt
Client> 2013-05-21 14:20:20 [CLIENT] [INFO] Found animation info for: textures/blocks/lava.txt
Client> 2013-05-21 14:20:21 [CLIENT] [INFO] Found animation info for: textures/blocks/portal.txt
Client> 2013-05-21 14:20:21 [CLIENT] [INFO] Found animation info for: textures/blocks/water.txt
Client> 2013-05-21 14:20:21 [CLIENT] [INFO] Found animation info for: textures/items/clock.txt
Client> 2013-05-21 14:20:21 [CLIENT] [INFO] Found animation info for: textures/items/compass.txt
Client> 2013-05-21 14:20:24 [CLIENT] [INFO] Connecting to localhost, 25565
Client> 2013-05-21 14:20:26 [CLIENT] [SEVERE] Reached end of stream

man thats a minecraft machanic - thats purpose

Hey, the Bug I reported isn't the same like that one. You've to wtach the video COMPLETE not the first 10 seconds. The real Bug is that the Dispenser/Dropper is ticking despite the Dispenser/Dropper isn't connected with redstone.

Yes i know but in what other way would you say that to them ?

look at my last bug report...