[2026-01-06 18:39:17.958] [INFO] [dev.kostromdan.mods.crash_assistant.app.CrashAssistantApp]: CrashAssistantApp running: JVM args: [-XX:+UseSerialGC, -XX:MaxHeapFreeRatio=30, -XX:MinHeapFreeRatio=10, -XX:MaxGCPauseMillis=10000, -Xms8m, -Xmx512m]
[2026-01-06 18:39:17.960] [INFO] [dev.kostromdan.mods.crash_assistant.app.CrashAssistantApp]: CrashAssistantApp running: program args: [-jarPath, local\crash_assistant\6524_1767695946446_app.jar, -parentPID, 6524, -parentStarted, 1767695946446, -platform, NEOFORGE, -loaderJarName, neoforge-21.1.217, -minecraftVersion, 1.21.1, -childProcessesPIDs, VU5ERUZJTkVE, -crashAssistantModJarName, CrashAssistant-neoforge-1.20.6-1.21.4-1.10.28.jar, -classPath, local\crash_assistant\6524_1767695946446_app.jar;local\crash_assistant\6524_1767695946446_mod.jar;C:\Users\********\curseforge\minecraft\Install\libraries\org\apache\logging\log4j\log4j-api\2.22.1\log4j-api-2.22.1.jar;C:\Users\********\curseforge\minecraft\Install\libraries\org\apache\logging\log4j\log4j-core\2.22.1\log4j-core-2.22.1.jar;C:\Users\********\curseforge\minecraft\Install\libraries\com\google\code\gson\gson\2.10.1\gson-2.10.1.jar;C:\Users\********\curseforge\minecraft\Install\libraries\commons-io\commons-io\2.15.1\commons-io-2.15.1.jar;C:\Users\********\curseforge\minecraft\Install\libraries\net\java\dev\jna\jna\5.14.0\jna-5.14.0.jar;C:\Users\********\curseforge\minecraft\Install\libraries\net\java\dev\jna\jna-platform\5.14.0\jna-platform-5.14.0.jar, -parentXms, 256m, -parentXmx, 8000m, -systemRAM, 15.9g, -processor, QU1EIFJ5emVuIDUgNTYwMCA2LUNvcmUgUHJvY2Vzc29yICAgICAgICAgICAgICA=, -serialisedGPUs, VnVsa2FuIEdQVSBkZXRlY3Rpb24gYWRkb24gbm90IGZvdW5kLCBmYWxsaW5nIGJhY2sgdG8gRGlyZWN0WApTdWNjZXNzZnVsbHkgZGV0ZWN0ZWQgR1BVcyB1c2luZyBEaXJlY3RYOgpERURJQ0FURUQgOiBOVklESUEgR2VGb3JjZSBSVFggNDA2MAoNCg==]
[2026-01-06 18:39:17.960] [INFO] [dev.kostromdan.mods.crash_assistant.app.CrashAssistantApp]: CrashAssistantApp running from: C:\Users\********\curseforge\minecraft\Instances\Better MC [NEOFORGE] BMC5
[2026-01-06 18:39:17.960] [INFO] [dev.kostromdan.mods.crash_assistant.app.CrashAssistantApp]: crashAssistantJarName: CrashAssistant-neoforge-1.20.6-1.21.4-1.10.28.jar
[2026-01-06 18:39:17.960] [INFO] [dev.kostromdan.mods.crash_assistant.app.CrashAssistantApp]: Parent PID: 6524
[2026-01-06 18:39:17.961] [INFO] [dev.kostromdan.mods.crash_assistant.app.CrashAssistantApp]: Parent started: 1767695946446
[2026-01-06 18:39:17.962] [INFO] [dev.kostromdan.mods.crash_assistant.app.CrashAssistantApp]: Platform: NEOFORGE
[2026-01-06 18:39:17.962] [INFO] [dev.kostromdan.mods.crash_assistant.app.CrashAssistantApp]: loaderJarName: neoforge-21.1.217
[2026-01-06 18:39:17.962] [INFO] [dev.kostromdan.mods.crash_assistant.app.CrashAssistantApp]: minecraftVersion: 1.21.1
[2026-01-06 18:39:17.963] [INFO] [dev.kostromdan.mods.crash_assistant.app.CrashAssistantApp]: childProcessesPIDs: UNDEFINED
[2026-01-06 18:39:17.963] [INFO] [dev.kostromdan.mods.crash_assistant.app.CrashAssistantApp]: parentXms: 256m
[2026-01-06 18:39:17.963] [INFO] [dev.kostromdan.mods.crash_assistant.app.CrashAssistantApp]: parentXmx: 8000m
[2026-01-06 18:39:17.963] [INFO] [dev.kostromdan.mods.crash_assistant.app.CrashAssistantApp]: systemRAM: 15.9g
[2026-01-06 18:39:17.963] [INFO] [dev.kostromdan.mods.crash_assistant.app.CrashAssistantApp]: processor: AMD Ryzen 5 5600 6-Core Processor
[2026-01-06 18:39:17.963] [INFO] [dev.kostromdan.mods.crash_assistant.app.CrashAssistantApp]: Boot.serialisedGPUs:
Vulkan GPU detection addon not found, falling back to DirectX
Successfully detected GPUs using DirectX:
DEDICATED : NVIDIA GeForce RTX 4060
[2026-01-06 18:39:17.964] [INFO] [dev.kostromdan.mods.crash_assistant.app.CrashAssistantApp]: os.name: windows 11
[2026-01-06 18:39:17.966] [INFO] [dev.kostromdan.mods.crash_assistant.app.CrashAssistantApp]: Java path: C:\Users\********\curseforge\minecraft\Install\runtime\java-runtime-delta\windows-x64\java-runtime-delta\bin\javaw.exe
[2026-01-06 18:39:17.966] [INFO] [dev.kostromdan.mods.crash_assistant.app.CrashAssistantApp]: Java version: 21.0.7+6-LTS
[2026-01-06 18:39:17.982] [INFO] [dev.kostromdan.mods.crash_assistant.app.CrashAssistantApp]: CrashAssistantApp started successfully. Waiting for PID 6524 to stop.
[2026-01-06 18:39:57.731] [INFO] [dev.kostromdan.mods.crash_assistant.app.CrashAssistantApp]: Minecraft is running on renderer:
NVIDIA GeForce RTX 4060/PCIe/SSE2
[2026-01-06 18:49:55.534] [INFO] [dev.kostromdan.mods.crash_assistant.app.CrashAssistantApp]: PID "6524" is not alive or reused by another process. Minecraft JVM appears to have stopped.
[2026-01-06 18:49:55.573] [INFO] [dev.kostromdan.mods.crash_assistant.app.CrashAssistantApp]: Adding latest.log from C:\Users\********\curseforge\minecraft\Instances\Better MC [NEOFORGE] BMC5\logs\latest.log
[2026-01-06 18:49:55.574] [INFO] [dev.kostromdan.mods.crash_assistant.app.CrashAssistantApp]: Adding debug.log from C:\Users\********\curseforge\minecraft\Instances\Better MC [NEOFORGE] BMC5\logs\debug.log
[2026-01-06 18:49:55.576] [INFO] [dev.kostromdan.mods.crash_assistant.app.CrashAssistantApp]: stderr_stream.log size: 385 bytes
[2026-01-06 18:49:55.578] [INFO] [dev.kostromdan.mods.crash_assistant.app.CrashAssistantApp]: Adding CurseForge: launcher_log.txt from C:\Users\********\curseforge\minecraft\Instances\Better MC [NEOFORGE] BMC5\..\..\Install\launcher_log.txt
[2026-01-06 18:49:55.585] [INFO] [dev.kostromdan.mods.crash_assistant.app.CrashAssistantApp]: Adding crash_assistant_app.log from C:\Users\********\curseforge\minecraft\Instances\Better MC [NEOFORGE] BMC5\logs\crash_assistant\crash_assistant_app.log
[2026-01-06 18:49:55.586] [INFO] [dev.kostromdan.mods.crash_assistant.app.CrashAssistantApp]: Reached first tick of TitleScreen: true
[2026-01-06 18:49:55.586] [INFO] [dev.kostromdan.mods.crash_assistant.app.CrashAssistantApp]: Joined world successfully: true
[2026-01-06 18:49:55.586] [INFO] [dev.kostromdan.mods.crash_assistant.app.CrashAssistantApp]: stop() function of Minecraft fired: false
[2026-01-06 18:49:55.586] [INFO] [dev.kostromdan.mods.crash_assistant.app.CrashAssistantApp]: close() function of Minecraft failed: false
[2026-01-06 18:49:55.587] [INFO] [dev.kostromdan.mods.crash_assistant.app.CrashAssistantApp]: emergencySave() function of Minecraft fired: false
[2026-01-06 18:49:55.599] [INFO] [dev.kostromdan.mods.crash_assistant.app.CrashAssistantApp]: isModpackCreator: false
[2026-01-06 18:49:55.600] [INFO] [dev.kostromdan.mods.crash_assistant.app.CrashAssistantApp]: isHelpLinkDefault: false
[2026-01-06 18:49:55.603] [INFO] [dev.kostromdan.mods.crash_assistant.app.CrashAssistantApp]: helpLink: https://discord.gg/lunapixel
[2026-01-06 18:49:55.604] [INFO] [dev.kostromdan.mods.crash_assistant.app.CrashAssistantApp]: Seems like Minecraft crashed without any crash report. Starting Crash Assistant app.
[2026-01-06 18:49:56.622] [INFO] [dev.kostromdan.mods.crash_assistant.app.CrashAssistantApp]: CrashAssistantGUI took to start: 1.087 seconds.
[2026-01-06 18:49:56.791] [INFO] [dev.kostromdan.mods.crash_assistant.common_config.mod_list.ModListUtils]: Parsed 326 mod(s) metadata in 139 ms
[2026-01-06 18:49:56.832] [INFO] [dev.kostromdan.mods.crash_assistant.app.CrashAssistantApp]: Adding modlist.txt from C:\Users\********\curseforge\minecraft\Instances\Better MC [NEOFORGE] BMC5\logs\modlist.txt
[2026-01-06 18:49:57.010] [INFO] [dev.kostromdan.mods.crash_assistant.app.CrashAssistantApp]: Reading finished in 36 ms
[2026-01-06 18:49:57.051] [WARN] [dev.kostromdan.mods.crash_assistant.app.CrashAssistantApp]: Skipping MixinApply analysis due to it's in beta and game ran by the end user of this modpack.
[2026-01-06 18:49:57.086] [INFO] [dev.kostromdan.mods.crash_assistant.app.CrashAssistantApp]: Analysis finished in 139 ms
[2026-01-06 18:49:57.089] [INFO] [dev.kostromdan.mods.crash_assistant.app.CrashAssistantApp]: Showing KnownCrashReason: ModernFixWatchDog
We detected a message at the end of **latest.log** from the IntegratedWatchdog about a server tick taking way longer than it should have:
**A single server tick has taken 40001, more than 40000 milliseconds**
If you were not doing something extremely demanding, like using WorldEdit to change trillions of blocks,
this likely means the Integrated Server has **deadlocked**.
A **deadlock** happens when parts of the game are waiting for each other and preventing anything from continuing,
like a traffic jam where every car is blocking another.
To fix this crash, check the **thread dump** at the end of the log: it shows which parts of the game were waiting for each other.
This can be hard to understand without technical knowledge.
You can try using some advanced reasoning LLM to analyze the **thread dump**; it may help identify the mod causing the issue.
If this happened in an unmodified modpack, please report it to the developers: it shouldn't happen.
[2026-01-06 18:50:03.435] [INFO] [dev.kostromdan.mods.crash_assistant.app.CrashAssistantApp]: Shown KnownCrashReason: ModernFixWatchDog (Seen warning for 6.311s)
[2026-01-06 18:50:05.309] [INFO] [dev.kostromdan.mods.crash_assistant.app.CrashAssistantApp]: IP-like version replacements computed: [0∙4∙3∙21, 2∙2∙4∙4, 19∙0∙0∙1, 5∙0∙0∙7, 3∙0∙2∙1, 4∙1∙0∙3, 1∙21∙1∙11, 4∙1∙0∙8, 2∙1∙0∙0, 19∙27∙0∙339, 1∙25∙12∙4, 0∙12∙15∙5, 0∙1∙8∙1, 0∙1∙5∙1, 0∙1∙4∙1, 1∙2∙10∙1, 0∙1∙0∙1, 10∙1∙0∙3, 0∙8∙5∙8, 0∙7∙5∙7, 1∙1∙4∙3, 1∙25∙12∙3]