PaperMC/Paper

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The most widely used, high performance Minecraft server that aims to fix gameplay and mechanics inconsistencies

Stars: 12.7k
Forks: 3.5k
Open beginner issues: 2
Indexed issues: 502
Avg merge: 3d 13h
Merged PRs (30d): 11

Dominant language: Java
License: No license data
Last GitHub push: Sep 11, 2026
Latest indexed: Sep 19, 2026
Contributing guide: Contributing guide
Code of conduct: No code of conduct
Beginner labels: No beginner labels indexed

Beginner friendly Everything

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502 open issues indexed

[26.3]PlayerArmSwingEvent incorrectly triggers deprecated warning for PlayerAnimationEvent Open

status: needs triage version: 26.3

Difficulty 3/5 1-2 days Newbie friendliness 68/100

PaperMC/Paper#14277 · Opened Sep 19, 2026
`Player#applyMending(amount)` does not apply mending to itemstacks whose material has no default `max_damage` Open

status: accepted version: 26.2

Difficulty 2/5 1-3 hours Newbie friendliness 88/100

PaperMC/Paper#14275 · Opened Sep 18, 2026
Seed randomization feature doesnt work Open

status: needs triage version: 26.2

Difficulty 4/5 3-5 days Newbie friendliness 52/100

PaperMC/Paper#14236 · 6 comments · Opened Sep 7, 2026
Entity is null in BlockReceiveGameEvent for chest interactions Open

status: accepted version: 26.2

Difficulty 3/5 1-2 days Newbie friendliness 56/100

PaperMC/Paper#14234 · Opened Sep 6, 2026
Add API method to retrieve a Block's associated Instrument Open

status: accepted

Difficulty 3/5 1-2 days Newbie friendliness 70/100

PaperMC/Paper#14228 · Opened Sep 1, 2026
Packet spam due to disagreement between client and server because of number clamping Open

status: needs triage version: 26.2

Difficulty 3/5 1-2 days Newbie friendliness 74/100

PaperMC/Paper#14222 · Opened Aug 30, 2026
PlayerProfile cache completions perform web requests Open

status: needs triage version: 26.2

Difficulty 4/5 3-5 days Newbie friendliness 42/100

PaperMC/Paper#14219 · 5 comments · Opened Aug 29, 2026
dialog action commands longer than the chat limit disconnects the player Open

status: needs triage

Difficulty 3/5 1-2 days Newbie friendliness 64/100

PaperMC/Paper#14212 · 2 comments · Opened Aug 24, 2026
invoking retrieveCookie(NamespacedKey) with the same namespace twice deletes the first retrive from the map, resulting in kicks Open

status: needs triage

Difficulty 3/5 1-2 days Newbie friendliness 72/100

PaperMC/Paper#14211 · 6 comments · Opened Aug 24, 2026
[ca.spottedleaf.moonrise.patches.chunk_system.level.entity.EntityLookup] Entity uuid already exists: Open

scope: performance status: needs triage version: 26.2

Difficulty 4/5 3-5 days Newbie friendliness 35/100

PaperMC/Paper#14208 · 1 comment · Opened Aug 23, 2026
I get insanely high amounts of ghost hits even when my ping and specs are good and stable. Open

status: needs triage

Difficulty 4/5 3-5 days Newbie friendliness 45/100

PaperMC/Paper#14202 · 6 comments · Opened Aug 21, 2026
World.unloadChunk(x, z, false) cumulatively persists entities to disk Open

status: needs triage version: 26.2

Difficulty 4/5 3-5 days Newbie friendliness 48/100

PaperMC/Paper#14188 · Opened Aug 14, 2026
DragonBattle API Open

status: accepted version: 26.2

Difficulty 4/5 3-5 days Newbie friendliness 55/100

PaperMC/Paper#14183 · 2 comments · Opened Aug 13, 2026
26.2 : Vanilla bug (MC-310372) causing redstone to randomly stop working when tripwire string is activated. Open

upstream: vanilla version: 26.2

Difficulty 4/5 3-5 days Newbie friendliness 50/100

PaperMC/Paper#14180 · 1 comment · Opened Aug 12, 2026
Add missing API code for operator permission levels and bypassesPlayerLimit Open

status: needs triage

Difficulty 4/5 3-5 days Newbie friendliness 52/100

PaperMC/Paper#14177 · 5 comments · 1 reaction · Opened Aug 11, 2026
Parallel structure generation corrupts nether fortresses / strongholds Open

status: needs triage

Difficulty 4/5 3-5 days Newbie friendliness 30/100

PaperMC/Paper#14176 · Opened Aug 10, 2026
Inlined sounds are not possible to create using the API Open

status: accepted version: 26.2

Difficulty 3/5 1-2 days Newbie friendliness 55/100

PaperMC/Paper#14171 · Opened Aug 9, 2026
Redstone dust/torches on a Lever's attached block don't update when the lever is toggled programmatically via the Bukkit API Open

status: needs triage version: 1.21.11

Difficulty 4/5 3-5 days Newbie friendliness 45/100

PaperMC/Paper#14170 · 1 comment · Opened Aug 9, 2026
BlockRedstoneEvent not reliably fired for Repeater blocks when redstone-implementation is VANILLA Open

status: needs triage version: 1.21.11

Difficulty 4/5 3-5 days Newbie friendliness 45/100

PaperMC/Paper#14169 · Opened Aug 9, 2026
Guard more event calls in hot code Open

for: future scope: performance

PaperMC/Paper#14153 · 2 comments · 1 reaction · 1 assignee · Opened Aug 7, 2026
sulfur_cube_bucket does not trigger PlayerBucketEmptyEvent Open

status: accepted version: 26.2

Difficulty 3/5 1-2 days Newbie friendliness 55/100

PaperMC/Paper#14149 · 2 comments · Opened Aug 6, 2026
Per-player projectile limit Open

status: needs triage

Difficulty 5/5 Over a week Newbie friendliness 38/100

PaperMC/Paper#14142 · Opened Aug 4, 2026
EntityPreDamageEvent Open

status: needs triage

Difficulty 5/5 Over a week Newbie friendliness 35/100

PaperMC/Paper#14138 · 2 comments · Opened Aug 4, 2026
The "minecraft.commandblock" permission is broken. Open

status: needs triage version: 26.2

Difficulty 3/5 1-2 days Newbie friendliness 63/100

PaperMC/Paper#14136 · 3 comments · 2 reactions · Opened Aug 3, 2026
BookMeta#asBook yields not full book Open

status: needs triage version: 26.2

Difficulty 3/5 1-2 days Newbie friendliness 50/100

PaperMC/Paper#14135 · Opened Aug 2, 2026
kickPlayer does not take effect immediately Open

status: needs triage version: 26.2

Difficulty 3/5 1-2 days Newbie friendliness 52/100

PaperMC/Paper#14133 · 2 comments · Opened Aug 2, 2026
`reenterConfiguration` can send `block_changed_ack` in the configuration protocol and crash the server Open

status: needs triage version: 26.2

Difficulty 4/5 3-5 days Newbie friendliness 48/100

PaperMC/Paper#14119 · 7 comments · Opened Jul 28, 2026
Server.properties bug - non-admin players get kicked for spam when sending a single message Open

status: accepted version: 26.2

Difficulty 3/5 1-2 days Newbie friendliness 62/100

PaperMC/Paper#14114 · Opened Jul 27, 2026
Sulfur Cube bucketing ignores cancellation PlayerInteractAtEntityEvent Open

scope: api status: accepted version: 26.2

Difficulty 3/5 1-2 days Newbie friendliness 55/100

PaperMC/Paper#14113 · Opened Jul 27, 2026
Expose CraftServer#ignoreVanillaPermissions to the API Open

status: needs triage

Difficulty 3/5 1-2 days Newbie friendliness 68/100

PaperMC/Paper#14108 · Opened Jul 26, 2026
Repeating `ScheduledTask` stays `CANCELLED_RUNNING` after its callback finishes Open

status: needs triage version: 26.2

Difficulty 3/5 1-2 days Newbie friendliness 65/100

PaperMC/Paper#14107 · Opened Jul 26, 2026
Revivify commands.yml Open

scope: configuration status: accepted

Difficulty 5/5 Over a week Newbie friendliness 35/100

PaperMC/Paper#14102 · 1 comment · Opened Jul 26, 2026
Add .getIgniter() to ExplosiveMinecart Open

status: needs triage

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

PaperMC/Paper#14097 · 1 comment · Opened Jul 23, 2026
MapItemSavedData.carriedByPlayers retains disconnected ServerPlayer references indefinitely Open

scope: performance status: accepted version: 26.2

Difficulty 4/5 3-5 days Newbie friendliness 45/100

PaperMC/Paper#14088 · 4 comments · 1 reaction · Opened Jul 20, 2026
Plugin channels send only in play state Open

status: accepted

Difficulty 4/5 3-5 days Newbie friendliness 48/100

PaperMC/Paper#14087 · Opened Jul 19, 2026
Invalid cross-device link when world migration starts (ZFS with a dataset for the dimension targeted) Open

status: needs triage

Difficulty 4/5 3-5 days Newbie friendliness 48/100

PaperMC/Paper#14078 · 1 comment · 1 reaction · Opened Jul 18, 2026
Throwing exception in custom arg before signed arg causes mismatch Open

status: accepted version: 26.2

Difficulty 4/5 3-5 days Newbie friendliness 55/100

PaperMC/Paper#14076 · 1 reaction · Opened Jul 17, 2026
Paper refuses to start after deleting `world_gen_settings.dat` file Open

status: accepted version: 26.2

Difficulty 4/5 3-5 days Newbie friendliness 48/100

PaperMC/Paper#14066 · 2 comments · 2 reactions · Opened Jul 14, 2026
PlayerTeleportEvent#setCancelled(true) does not cancel when spectating entity Open

status: needs triage version: 26.1.2

Difficulty 4/5 3-5 days Newbie friendliness 52/100

PaperMC/Paper#14065 · 4 comments · Opened Jul 14, 2026
java.nio.file.AtomicMoveNotSupportedException during world storage migration not handled Open

status: needs triage

Difficulty 4/5 3-5 days Newbie friendliness 58/100

PaperMC/Paper#14059 · 4 comments · 1 reaction · Opened Jul 13, 2026
Adding valueless tags to PersistentDataContainer Open

status: needs triage

Difficulty 5/5 Over a week Newbie friendliness 35/100

PaperMC/Paper#14053 · Opened Jul 12, 2026
Wandering Trader leash desync when re-entering tracking distance Open

status: accepted version: 26.2

Difficulty 4/5 3-5 days Newbie friendliness 52/100

PaperMC/Paper#14049 · Opened Jul 10, 2026
openpty UnsatisfiedLinkError during startup Open

status: needs triage version: 26.2

Difficulty 4/5 3-5 days Newbie friendliness 45/100

PaperMC/Paper#14046 · 16 comments · Opened Jul 9, 2026
BlockBreakEvent missfires when player in adventure mode switches item in a last tick Open

status: needs triage version: 26.1.2

Difficulty 3/5 1-2 days Newbie friendliness 45/100

PaperMC/Paper#14042 · 1 comment · Opened Jul 8, 2026
Add event to account for items being ejected from item frames Open

status: needs triage

Difficulty 5/5 Over a week Newbie friendliness 35/100

PaperMC/Paper#14041 · Opened Jul 7, 2026
NoSuchMethodError for (removed adventure) Book interface's setter Open

status: needs triage version: 26.2

Difficulty 4/5 3-5 days Newbie friendliness 47/100

PaperMC/Paper#14030 · 6 comments · Opened Jul 4, 2026
Expose server API version along with helper methods Open

status: needs triage

Difficulty 5/5 Over a week Newbie friendliness 35/100

PaperMC/Paper#14015 · 7 comments · Opened Jun 30, 2026
World Clock API Open

scope: api status: accepted

Difficulty 5/5 Over a week Newbie friendliness 35/100

PaperMC/Paper#14007 · 1 comment · Opened Jun 29, 2026
Bundled mysql-connector-j protobuf causes OpenTelemetry incompatibility Open

status: needs triage version: 26.1.2

Difficulty 3/5 1-2 days Newbie friendliness 48/100

PaperMC/Paper#13996 · 1 comment · Opened Jun 28, 2026
Detected unsafe terrain read during worldgen in 26.2 (MC-307918) Open

status: needs triage upstream: vanilla version: 26.2

Difficulty 4/5 3-5 days Newbie friendliness 35/100

PaperMC/Paper#13995 · 2 comments · 3 reactions · Opened Jun 28, 2026

PaperMC/Paper

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