There are a lot of mods present, so hopefully it isn't an issue with one of those, however, it looks like an issue with Dynmap Compat or something.
---- Minecraft Crash Report ----
WARNING: coremods are present:
ShetiPhian-ASM (ShetiPhian-ASM-1.12.0.jar)
MicdoodlePlugin (MicdoodleCore-1.12.2-4.0.1.181.jar)
EnderCorePlugin (EnderCore-1.12.2-0.5.43 (1).jar)
IELoadingPlugin (ImmersiveEngineering-core-0.12-86.jar)
LoadingPlugin (Quark-r1.5-130.jar)
MovingWorldCore (movingworld-1.12-6.342-full.jar)
CTMCorePlugin (CTM-MC1.12.2-0.3.2.20.jar)
Contact their authors BEFORE contacting forge
// You should try our sister game, Minceraft!
Time: 6/11/19 11:48 AM
Description: Exception in server tick loop
java.util.ConcurrentModificationException
at java.util.HashMap$HashIterator.nextNode(Unknown Source)
at java.util.HashMap$KeyIterator.next(Unknown Source)
at the_fireplace.clans.clan.ClanChunkCache.clansWithClaims(ClanChunkCache.java:33)
at the_fireplace.clans.compat.dynmap.DynmapCompat.initializeMap(DynmapCompat.java:149)
at the_fireplace.clans.compat.dynmap.DynmapCompat.onServerTickEvent(DynmapCompat.java:69)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_867_DynmapCompat_onServerTickEvent_ServerTickEvent.invoke(.dynamic)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90)
at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:182)
at net.minecraftforge.fml.common.FMLCommonHandler.onPostServerTick(FMLCommonHandler.java:266)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:712)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:526)
at java.lang.Thread.run(Unknown Source)
A detailed walkthrough of the error, its code path and all known details is as follows:
-- System Details --
Details:
Minecraft Version: 1.12.2
Operating System: Windows 10 (amd64) version 10.0
Java Version: 1.8.0_181, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 2380261760 bytes (2269 MB) / 6442450944 bytes (6144 MB) up to 12884901888 bytes (12288 MB)
JVM Flags: 3 total; -Xmx12G -Xms6G -XX:+UseG1GC
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML: MCP 9.42 Powered by Forge 14.23.5.2838 110 mods loaded, 110 mods active
States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored
appliedenergistics2|API (rv6) from appliedenergistics2-rv6-stable-4.jar
Baubles|API (1.4.0.2) from Baubles-1.12-1.5.2.jar
BetterWithModsAPI (Beta 0.6) from Quark-r1.5-130.jar
bigreactors|API (4.0.1) from ExtremeReactors-1.12.2-0.4.5.49.jar
BuildCraftAPI|blocks (1.0) from buildcraft-7.99.18.jar
BuildCraftAPI|boards (2.0) from buildcraft-7.99.18.jar
BuildCraftAPI|core (2.2) from buildcraft-7.99.18.jar
BuildCraftAPI|crops (1.1) from buildcraft-7.99.18.jar
BuildCraftAPI|enums (1.0) from buildcraft-7.99.18.jar
BuildCraftAPI|events (2.0) from buildcraft-7.99.18.jar
BuildCraftAPI|facades (1.1) from buildcraft-7.99.18.jar
BuildCraftAPI|filler (5.0) from buildcraft-7.99.18.jar
BuildCraftAPI|fuels (2.0) from buildcraft-7.99.18.jar
BuildCraftAPI|gates (4.1) from buildcraft-7.99.18.jar
BuildCraftAPI|items (1.1) from buildcraft-7.99.18.jar
BuildCraftAPI|library (2.0) from buildcraft-7.99.18.jar
BuildCraftAPI|lists (1.0) from buildcraft-7.99.18.jar
BuildCraftAPI|power (1.3) from buildcraft-7.99.18.jar
BuildCraftAPI|recipes (3.0) from buildcraft-7.99.18.jar
BuildCraftAPI|robotics (3.0) from buildcraft-7.99.18.jar
BuildCraftAPI|statements (1.1) from buildcraft-7.99.18.jar
BuildCraftAPI|tiles (1.2) from buildcraft-7.99.18.jar
BuildCraftAPI|tools (1.0) from buildcraft-7.99.18.jar
BuildCraftAPI|transport (5.0) from buildcraft-7.99.18.jar
cofhapi (2.5.0) from CoFHCore-1.12.2-4.6.1.22-universal.jar
ComputerCraft|API (1.80pr1) from ComputerCraft1.80pr1.jar
ComputerCraft|API|FileSystem (1.80pr1) from ComputerCraft1.80pr1.jar
ComputerCraft|API|Lua (1.80pr1) from ComputerCraft1.80pr1.jar
ComputerCraft|API|Media (1.80pr1) from ComputerCraft1.80pr1.jar
ComputerCraft|API|Network (1.80pr1) from ComputerCraft1.80pr1.jar
ComputerCraft|API|Peripheral (1.80pr1) from ComputerCraft1.80pr1.jar
ComputerCraft|API|Permissions (1.80pr1) from ComputerCraft1.80pr1.jar
ComputerCraft|API|Redstone (1.80pr1) from ComputerCraft1.80pr1.jar
ComputerCraft|API|Turtle (1.80pr1) from ComputerCraft1.80pr1.jar
CoroAI|dynamicdifficulty (1.0) from coroutil-1.12.1-1.2.11.jar
ctm-api (0.1.0) from CTM-MC1.12.2-0.3.2.20.jar
ctm-api-events (0.1.0) from CTM-MC1.12.2-0.3.2.20.jar
ctm-api-models (0.1.0) from CTM-MC1.12.2-0.3.2.20.jar
ctm-api-textures (0.1.0) from CTM-MC1.12.2-0.3.2.20.jar
ctm-api-utils (0.1.0) from CTM-MC1.12.2-0.3.2.20.jar
enderioapi (4.0.0) from EnderIO-1.12.2-5.0.39.jar
enderioapi|addon (4.0.0) from EnderIO-1.12.2-5.0.39.jar
enderioapi|capacitor (4.0.0) from EnderIO-1.12.2-5.0.39.jar
enderioapi|conduits (4.0.0) from EnderIO-1.12.2-5.0.39.jar
enderioapi|farm (4.0.0) from EnderIO-1.12.2-5.0.39.jar
enderioapi|redstone (4.0.0) from EnderIO-1.12.2-5.0.39.jar
enderioapi|teleport (4.0.0) from EnderIO-1.12.2-5.0.39.jar
enderioapi|tools (4.0.0) from EnderIO-1.12.2-5.0.39.jar
enderioapi|upgrades (4.0.0) from EnderIO-1.12.2-5.0.39.jar
ForestryAPI|apiculture (5.0.0) from forestry_1.12.2-5.8.2.369.jar
ForestryAPI|arboriculture (4.3.0) from forestry_1.12.2-5.8.2.369.jar
ForestryAPI|book (5.8.1) from forestry_1.12.2-5.8.2.369.jar
ForestryAPI|circuits (3.1.0) from forestry_1.12.2-5.8.2.369.jar
ForestryAPI|climate (5.0.0) from forestry_1.12.2-5.8.2.369.jar
ForestryAPI|core (5.7.0) from forestry_1.12.2-5.8.2.369.jar
ForestryAPI|farming (5.8.0) from forestry_1.12.2-5.8.2.369.jar
ForestryAPI|food (1.1.0) from forestry_1.12.2-5.8.2.369.jar
ForestryAPI|fuels (3.0.0) from forestry_1.12.2-5.8.2.369.jar
ForestryAPI|genetics (5.7.0) from forestry_1.12.2-5.8.2.369.jar
ForestryAPI|gui (5.8.0) from forestry_1.12.2-5.8.2.369.jar
ForestryAPI|hives (4.1.0) from forestry_1.12.2-5.8.2.369.jar
ForestryAPI|lepidopterology (1.4.0) from forestry_1.12.2-5.8.2.369.jar
ForestryAPI|mail (3.1.0) from forestry_1.12.2-5.8.2.369.jar
ForestryAPI|modules (5.7.0) from forestry_1.12.2-5.8.2.369.jar
ForestryAPI|multiblock (3.0.0) from forestry_1.12.2-5.8.2.369.jar
ForestryAPI|recipes (5.4.0) from forestry_1.12.2-5.8.2.369.jar
ForestryAPI|storage (5.0.0) from forestry_1.12.2-5.8.2.369.jar
ForestryAPI|world (2.1.0) from forestry_1.12.2-5.8.2.369.jar
Galacticraft API (1.1) from GalacticraftCore-1.12.2-4.0.1.181.jar
ImmersiveEngineering|API (1.0) from ImmersiveEngineering-0.12-86.jar
ImmersiveEngineering|ImmersiveFluxAPI (1.0) from ImmersiveEngineering-0.12-86.jar
JustEnoughItemsAPI (4.13.0) from jei_1.12.2-4.8.5.151.jar
projectred|api (2.0) from ProjectRed-1.12.2-4.9.1.92-Base.jar
QuarkAPI (2) from Quark-r1.5-130.jar
reborncoreAPI (3.10.4.348) from RebornCore-1.12.2-3.10.4.348-universal.jar
reborncoreAPI|Power (3.10.4.348) from RebornCore-1.12.2-3.10.4.348-universal.jar
reborncoreAPI|Recipe (3.10.4.348) from RebornCore-1.12.2-3.10.4.348-universal.jar
reborncoreAPI|Tile (3.10.4.348) from RebornCore-1.12.2-3.10.4.348-universal.jar
redstonefluxapi (2.1.0) from RedstoneFlux-1.12-2.1.0.6-universal.jar
stevescartsAPI (${version}) from StevesCarts-1.12.2-2.4.24.118.jar
stevescartsAPI|FARMS (${version}) from StevesCarts-1.12.2-2.4.24.118.jar
valkyrielib.api (1.12.2-2.0.10a) from valkyrielib-1.12.2-2.0.18.3.jar
WailaAPI (1.3) from Hwyla-1.8.26-B41_1.12.2.jar
zerocore|API|multiblock (1.10.2-0.0.2) from zerocore-1.12-0.1.2.2.jar
zerocore|API|multiblock|rectangular (1.10.2-0.0.2) from zerocore-1.12-0.1.2.2.jar
zerocore|API|multiblock|tier (1.10.2-0.0.2) from zerocore-1.12-0.1.2.2.jar
zerocore|API|multiblock|validation (1.10.2-0.0.2) from zerocore-1.12-0.1.2.2.jar
RebornCore:
Plugin Engine: 0
RebornCore Version: 3.10.4.348
Runtime Debofucsation 1
Ender IO: No known problems detected.
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!You are looking at the diagnostics information, not at the crash. !!!
!!!Scroll up until you see the line with '---- Minecraft Crash Report ----'!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
AE2 Integration: IC2:ON, RC:OFF, MFR:OFF, Waila:ON, Mekanism:OFF, OpenComputers:OFF, THE_ONE_PROBE:OFF, TESLA:ON, CRAFTTWEAKER:ON
Profiler Position: N/A (disabled)
Player Count: 0 / 20; []
Is Modded: Definitely; Server brand changed to 'fml,forge'
Type: Dedicated Server (map_server.txt)
There are a lot of mods present, so hopefully it isn't an issue with one of those, however, it looks like an issue with Dynmap Compat or something.
---- Minecraft Crash Report ----
WARNING: coremods are present: ShetiPhian-ASM (ShetiPhian-ASM-1.12.0.jar) MicdoodlePlugin (MicdoodleCore-1.12.2-4.0.1.181.jar) EnderCorePlugin (EnderCore-1.12.2-0.5.43 (1).jar) IELoadingPlugin (ImmersiveEngineering-core-0.12-86.jar) LoadingPlugin (Quark-r1.5-130.jar) MovingWorldCore (movingworld-1.12-6.342-full.jar) CTMCorePlugin (CTM-MC1.12.2-0.3.2.20.jar) Contact their authors BEFORE contacting forge
// You should try our sister game, Minceraft!
Time: 6/11/19 11:48 AM Description: Exception in server tick loop
java.util.ConcurrentModificationException at java.util.HashMap$HashIterator.nextNode(Unknown Source) at java.util.HashMap$KeyIterator.next(Unknown Source) at the_fireplace.clans.clan.ClanChunkCache.clansWithClaims(ClanChunkCache.java:33) at the_fireplace.clans.compat.dynmap.DynmapCompat.initializeMap(DynmapCompat.java:149) at the_fireplace.clans.compat.dynmap.DynmapCompat.onServerTickEvent(DynmapCompat.java:69) at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_867_DynmapCompat_onServerTickEvent_ServerTickEvent.invoke(.dynamic) at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90) at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:182) at net.minecraftforge.fml.common.FMLCommonHandler.onPostServerTick(FMLCommonHandler.java:266) at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:712) at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:526) at java.lang.Thread.run(Unknown Source)
A detailed walkthrough of the error, its code path and all known details is as follows:
-- System Details -- Details: Minecraft Version: 1.12.2 Operating System: Windows 10 (amd64) version 10.0 Java Version: 1.8.0_181, Oracle Corporation Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation Memory: 2380261760 bytes (2269 MB) / 6442450944 bytes (6144 MB) up to 12884901888 bytes (12288 MB) JVM Flags: 3 total; -Xmx12G -Xms6G -XX:+UseG1GC IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0 FML: MCP 9.42 Powered by Forge 14.23.5.2838 110 mods loaded, 110 mods active States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored
ShetiPhian-ASM (ShetiPhian-ASM-1.12.0.jar) shetiphian.asm.ClassTransformer MicdoodlePlugin (MicdoodleCore-1.12.2-4.0.1.181.jar) micdoodle8.mods.miccore.MicdoodleTransformer EnderCorePlugin (EnderCore-1.12.2-0.5.43 (1).jar) com.enderio.core.common.transform.EnderCoreTransformer com.enderio.core.common.transform.SimpleMixinPatcher IELoadingPlugin (ImmersiveEngineering-core-0.12-86.jar) blusunrize.immersiveengineering.common.asm.IEClassTransformer LoadingPlugin (Quark-r1.5-130.jar) vazkii.quark.base.asm.ClassTransformer MovingWorldCore (movingworld-1.12-6.342-full.jar)
CTMCorePlugin (CTM-MC1.12.2-0.3.2.20.jar) team.chisel.ctm.client.asm.CTMTransformer AE2 Version: stable rv6-stable-4 for Forge 14.23.5.2768 Pulsar/tconstruct loaded Pulses:
wailaIntegration (Enabled/Not Forced)
Pulsar/natura loaded Pulses:
NaturaWorld (Enabled/Not Forced)
List of loaded APIs:
zerocore|API|multiblock|validation (1.10.2-0.0.2) from zerocore-1.12-0.1.2.2.jar RebornCore: Plugin Engine: 0 RebornCore Version: 3.10.4.348 Runtime Debofucsation 1 Ender IO: No known problems detected.
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!You are looking at the diagnostics information, not at the crash. !!! !!!Scroll up until you see the line with '---- Minecraft Crash Report ----'!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
AE2 Integration: IC2:ON, RC:OFF, MFR:OFF, Waila:ON, Mekanism:OFF, OpenComputers:OFF, THE_ONE_PROBE:OFF, TESLA:ON, CRAFTTWEAKER:ON Profiler Position: N/A (disabled) Player Count: 0 / 20; [] Is Modded: Definitely; Server brand changed to 'fml,forge' Type: Dedicated Server (map_server.txt)