fix: PlayerServerFullCheckEvent#deny not setting the allow flag by Timongcraft · Pull Request #13601 · PaperMC/Paper

Timongcraft · 2026-02-04T18:46:48Z

No description provided.

OtonashiHorobu · 2026-02-05T03:38:10Z

This seems to prevent players from joining in an empty server.

electronicboy · 2026-02-05T04:08:06Z

That is caused by plugins calling the deny method when they're not actually denying the event

SunnyCat95 · 2026-02-05T16:19:07Z

Well, sadly this issue seems not to be resolved.
#106 is crashing mcMMo and not letting it start by the way

and from at least #105 and #104 nobody except Admin (with * permission) can join!
so with #102 it still works fine..

electronicboy · 2026-02-05T16:23:42Z

The "fix" here is making the deny method actually deny connections. The issue is that at least 1 plugin was blindly using the deny method to set the message without the intent to actually deny the connection attempt;

Plugins need to call the deny method if they only intend to actually deny the connection

SunnyCat95 · 2026-02-05T16:26:48Z

The "fix" here is making the deny method actually deny connections. The issue is that at least 1 plugin was blindly using the deny method to set the message without the intent to actually deny the connection attempt;
Plugins need to call the deny method if they only intend to actually deny the connection

So I have to find out which plugin is causing this?
Then I rather stay on 102 and so at least also mcMMo is still working (not working anymore from 106 on)^^

it worked totally fine before and with 103 on it got worse, sadly :(
Not sure what I can and should do now to resolve it and getting the newer paper-versions.^^

Doc94 · 2026-02-05T16:52:56Z

You can find plugins using the event fixed using https://docs.papermc.io/paper/reference/commands/#dumplisteners with that can report to authors for handle.

SwordfishBE · 2026-02-05T17:18:35Z

Also broke my server. This fix should have been considered more carefully. I suspect many users are now experiencing problems.

masmc05 · 2026-02-05T18:10:33Z

You can send the output of the dumplisteners command in discord so someone could help you with this. For example it is already known how to disable the broken feature in essentials as a temporary fix

OtonashiHorobu · 2026-02-06T01:38:08Z

io.papermc.paper.event.player.PlayerServerFullCheckEvent
- RegisteredListener{plugin="Essentials", listener="com.earth2me.essentials.EssentialsPlayerListener$LoginListener1_21@d2db5ab", executor="TimedEventExecutor['MethodHandleEventExecutorTemplate['public void com.earth2me.essentials.EssentialsPlayerListener$LoginListener1_21.onPlayerListFull(io.papermc.paper.event.player.PlayerServerFullCheckEvent)']']", priority="HIGH (3)", ignoringCancelled=false}

In my case, it was caused by EssentialsX, and could be fixed by setting use-custom-server-full-message to false in its config.yml.

Fixes#6424 Caused by PaperMC/Paper#13601

FixesEssentialsX#6424 Caused by PaperMC/Paper#13601

Timongcraft · 2026-02-04T18:46:48Z

No description provided.

OtonashiHorobu · 2026-02-05T03:38:10Z

This seems to prevent players from joining in an empty server.

electronicboy · 2026-02-05T04:08:06Z

That is caused by plugins calling the deny method when they're not actually denying the event

SunnyCat95 · 2026-02-05T16:19:07Z

Well, sadly this issue seems not to be resolved.
#106 is crashing mcMMo and not letting it start by the way

and from at least #105 and #104 nobody except Admin (with * permission) can join!
so with #102 it still works fine..

electronicboy · 2026-02-05T16:23:42Z

The "fix" here is making the deny method actually deny connections. The issue is that at least 1 plugin was blindly using the deny method to set the message without the intent to actually deny the connection attempt;

Plugins need to call the deny method if they only intend to actually deny the connection

SunnyCat95 · 2026-02-05T16:26:48Z

The "fix" here is making the deny method actually deny connections. The issue is that at least 1 plugin was blindly using the deny method to set the message without the intent to actually deny the connection attempt;
Plugins need to call the deny method if they only intend to actually deny the connection

So I have to find out which plugin is causing this?
Then I rather stay on 102 and so at least also mcMMo is still working (not working anymore from 106 on)^^

it worked totally fine before and with 103 on it got worse, sadly :(
Not sure what I can and should do now to resolve it and getting the newer paper-versions.^^

Doc94 · 2026-02-05T16:52:56Z

You can find plugins using the event fixed using https://docs.papermc.io/paper/reference/commands/#dumplisteners with that can report to authors for handle.

SwordfishBE · 2026-02-05T17:18:35Z

Also broke my server. This fix should have been considered more carefully. I suspect many users are now experiencing problems.

masmc05 · 2026-02-05T18:10:33Z

You can send the output of the dumplisteners command in discord so someone could help you with this. For example it is already known how to disable the broken feature in essentials as a temporary fix

OtonashiHorobu · 2026-02-06T01:38:08Z

io.papermc.paper.event.player.PlayerServerFullCheckEvent
- RegisteredListener{plugin="Essentials", listener="com.earth2me.essentials.EssentialsPlayerListener$LoginListener1_21@d2db5ab", executor="TimedEventExecutor['MethodHandleEventExecutorTemplate['public void com.earth2me.essentials.EssentialsPlayerListener$LoginListener1_21.onPlayerListFull(io.papermc.paper.event.player.PlayerServerFullCheckEvent)']']", priority="HIGH (3)", ignoringCancelled=false}

In my case, it was caused by EssentialsX, and could be fixed by setting use-custom-server-full-message to false in its config.yml.

Fixes#6424 Caused by PaperMC/Paper#13601

FixesEssentialsX#6424 Caused by PaperMC/Paper#13601

Timongcraft · 2026-02-04T18:46:48Z

No description provided.

OtonashiHorobu · 2026-02-05T03:38:10Z

This seems to prevent players from joining in an empty server.

electronicboy · 2026-02-05T04:08:06Z

That is caused by plugins calling the deny method when they're not actually denying the event

SunnyCat95 · 2026-02-05T16:19:07Z

Well, sadly this issue seems not to be resolved.
#106 is crashing mcMMo and not letting it start by the way

and from at least #105 and #104 nobody except Admin (with * permission) can join!
so with #102 it still works fine..

electronicboy · 2026-02-05T16:23:42Z

The "fix" here is making the deny method actually deny connections. The issue is that at least 1 plugin was blindly using the deny method to set the message without the intent to actually deny the connection attempt;

Plugins need to call the deny method if they only intend to actually deny the connection

SunnyCat95 · 2026-02-05T16:26:48Z

The "fix" here is making the deny method actually deny connections. The issue is that at least 1 plugin was blindly using the deny method to set the message without the intent to actually deny the connection attempt;
Plugins need to call the deny method if they only intend to actually deny the connection

So I have to find out which plugin is causing this?
Then I rather stay on 102 and so at least also mcMMo is still working (not working anymore from 106 on)^^

it worked totally fine before and with 103 on it got worse, sadly :(
Not sure what I can and should do now to resolve it and getting the newer paper-versions.^^

Doc94 · 2026-02-05T16:52:56Z

You can find plugins using the event fixed using https://docs.papermc.io/paper/reference/commands/#dumplisteners with that can report to authors for handle.

SwordfishBE · 2026-02-05T17:18:35Z

Also broke my server. This fix should have been considered more carefully. I suspect many users are now experiencing problems.

masmc05 · 2026-02-05T18:10:33Z

You can send the output of the dumplisteners command in discord so someone could help you with this. For example it is already known how to disable the broken feature in essentials as a temporary fix

OtonashiHorobu · 2026-02-06T01:38:08Z

io.papermc.paper.event.player.PlayerServerFullCheckEvent
- RegisteredListener{plugin="Essentials", listener="com.earth2me.essentials.EssentialsPlayerListener$LoginListener1_21@d2db5ab", executor="TimedEventExecutor['MethodHandleEventExecutorTemplate['public void com.earth2me.essentials.EssentialsPlayerListener$LoginListener1_21.onPlayerListFull(io.papermc.paper.event.player.PlayerServerFullCheckEvent)']']", priority="HIGH (3)", ignoringCancelled=false}

In my case, it was caused by EssentialsX, and could be fixed by setting use-custom-server-full-message to false in its config.yml.

Fixes#6424 Caused by PaperMC/Paper#13601

FixesEssentialsX#6424 Caused by PaperMC/Paper#13601

Timongcraft · 2026-02-04T18:46:48Z

No description provided.

OtonashiHorobu · 2026-02-05T03:38:10Z

This seems to prevent players from joining in an empty server.

electronicboy · 2026-02-05T04:08:06Z

That is caused by plugins calling the deny method when they're not actually denying the event

SunnyCat95 · 2026-02-05T16:19:07Z

Well, sadly this issue seems not to be resolved.
#106 is crashing mcMMo and not letting it start by the way

and from at least #105 and #104 nobody except Admin (with * permission) can join!
so with #102 it still works fine..

electronicboy · 2026-02-05T16:23:42Z

The "fix" here is making the deny method actually deny connections. The issue is that at least 1 plugin was blindly using the deny method to set the message without the intent to actually deny the connection attempt;

Plugins need to call the deny method if they only intend to actually deny the connection

SunnyCat95 · 2026-02-05T16:26:48Z

The "fix" here is making the deny method actually deny connections. The issue is that at least 1 plugin was blindly using the deny method to set the message without the intent to actually deny the connection attempt;
Plugins need to call the deny method if they only intend to actually deny the connection

So I have to find out which plugin is causing this?
Then I rather stay on 102 and so at least also mcMMo is still working (not working anymore from 106 on)^^

it worked totally fine before and with 103 on it got worse, sadly :(
Not sure what I can and should do now to resolve it and getting the newer paper-versions.^^

Doc94 · 2026-02-05T16:52:56Z

You can find plugins using the event fixed using https://docs.papermc.io/paper/reference/commands/#dumplisteners with that can report to authors for handle.

SwordfishBE · 2026-02-05T17:18:35Z

Also broke my server. This fix should have been considered more carefully. I suspect many users are now experiencing problems.

masmc05 · 2026-02-05T18:10:33Z

You can send the output of the dumplisteners command in discord so someone could help you with this. For example it is already known how to disable the broken feature in essentials as a temporary fix

OtonashiHorobu · 2026-02-06T01:38:08Z

io.papermc.paper.event.player.PlayerServerFullCheckEvent
- RegisteredListener{plugin="Essentials", listener="com.earth2me.essentials.EssentialsPlayerListener$LoginListener1_21@d2db5ab", executor="TimedEventExecutor['MethodHandleEventExecutorTemplate['public void com.earth2me.essentials.EssentialsPlayerListener$LoginListener1_21.onPlayerListFull(io.papermc.paper.event.player.PlayerServerFullCheckEvent)']']", priority="HIGH (3)", ignoringCancelled=false}

In my case, it was caused by EssentialsX, and could be fixed by setting use-custom-server-full-message to false in its config.yml.

Fixes#6424 Caused by PaperMC/Paper#13601

FixesEssentialsX#6424 Caused by PaperMC/Paper#13601

Timongcraft · 2026-02-04T18:46:48Z

No description provided.

OtonashiHorobu · 2026-02-05T03:38:10Z

This seems to prevent players from joining in an empty server.

electronicboy · 2026-02-05T04:08:06Z

That is caused by plugins calling the deny method when they're not actually denying the event

SunnyCat95 · 2026-02-05T16:19:07Z

Well, sadly this issue seems not to be resolved.
#106 is crashing mcMMo and not letting it start by the way

and from at least #105 and #104 nobody except Admin (with * permission) can join!
so with #102 it still works fine..

electronicboy · 2026-02-05T16:23:42Z

The "fix" here is making the deny method actually deny connections. The issue is that at least 1 plugin was blindly using the deny method to set the message without the intent to actually deny the connection attempt;

Plugins need to call the deny method if they only intend to actually deny the connection

SunnyCat95 · 2026-02-05T16:26:48Z

The "fix" here is making the deny method actually deny connections. The issue is that at least 1 plugin was blindly using the deny method to set the message without the intent to actually deny the connection attempt;
Plugins need to call the deny method if they only intend to actually deny the connection

So I have to find out which plugin is causing this?
Then I rather stay on 102 and so at least also mcMMo is still working (not working anymore from 106 on)^^

it worked totally fine before and with 103 on it got worse, sadly :(
Not sure what I can and should do now to resolve it and getting the newer paper-versions.^^

Doc94 · 2026-02-05T16:52:56Z

You can find plugins using the event fixed using https://docs.papermc.io/paper/reference/commands/#dumplisteners with that can report to authors for handle.

SwordfishBE · 2026-02-05T17:18:35Z

Also broke my server. This fix should have been considered more carefully. I suspect many users are now experiencing problems.

masmc05 · 2026-02-05T18:10:33Z

You can send the output of the dumplisteners command in discord so someone could help you with this. For example it is already known how to disable the broken feature in essentials as a temporary fix

OtonashiHorobu · 2026-02-06T01:38:08Z

io.papermc.paper.event.player.PlayerServerFullCheckEvent
- RegisteredListener{plugin="Essentials", listener="com.earth2me.essentials.EssentialsPlayerListener$LoginListener1_21@d2db5ab", executor="TimedEventExecutor['MethodHandleEventExecutorTemplate['public void com.earth2me.essentials.EssentialsPlayerListener$LoginListener1_21.onPlayerListFull(io.papermc.paper.event.player.PlayerServerFullCheckEvent)']']", priority="HIGH (3)", ignoringCancelled=false}

In my case, it was caused by EssentialsX, and could be fixed by setting use-custom-server-full-message to false in its config.yml.

Fixes#6424 Caused by PaperMC/Paper#13601

FixesEssentialsX#6424 Caused by PaperMC/Paper#13601

Timongcraft · 2026-02-04T18:46:48Z

No description provided.

OtonashiHorobu · 2026-02-05T03:38:10Z

This seems to prevent players from joining in an empty server.

electronicboy · 2026-02-05T04:08:06Z

That is caused by plugins calling the deny method when they're not actually denying the event

SunnyCat95 · 2026-02-05T16:19:07Z

Well, sadly this issue seems not to be resolved.
#106 is crashing mcMMo and not letting it start by the way

and from at least #105 and #104 nobody except Admin (with * permission) can join!
so with #102 it still works fine..

electronicboy · 2026-02-05T16:23:42Z

The "fix" here is making the deny method actually deny connections. The issue is that at least 1 plugin was blindly using the deny method to set the message without the intent to actually deny the connection attempt;

Plugins need to call the deny method if they only intend to actually deny the connection

SunnyCat95 · 2026-02-05T16:26:48Z

The "fix" here is making the deny method actually deny connections. The issue is that at least 1 plugin was blindly using the deny method to set the message without the intent to actually deny the connection attempt;
Plugins need to call the deny method if they only intend to actually deny the connection

So I have to find out which plugin is causing this?
Then I rather stay on 102 and so at least also mcMMo is still working (not working anymore from 106 on)^^

it worked totally fine before and with 103 on it got worse, sadly :(
Not sure what I can and should do now to resolve it and getting the newer paper-versions.^^

Doc94 · 2026-02-05T16:52:56Z

You can find plugins using the event fixed using https://docs.papermc.io/paper/reference/commands/#dumplisteners with that can report to authors for handle.

SwordfishBE · 2026-02-05T17:18:35Z

Also broke my server. This fix should have been considered more carefully. I suspect many users are now experiencing problems.

masmc05 · 2026-02-05T18:10:33Z

You can send the output of the dumplisteners command in discord so someone could help you with this. For example it is already known how to disable the broken feature in essentials as a temporary fix

OtonashiHorobu · 2026-02-06T01:38:08Z

io.papermc.paper.event.player.PlayerServerFullCheckEvent
- RegisteredListener{plugin="Essentials", listener="com.earth2me.essentials.EssentialsPlayerListener$LoginListener1_21@d2db5ab", executor="TimedEventExecutor['MethodHandleEventExecutorTemplate['public void com.earth2me.essentials.EssentialsPlayerListener$LoginListener1_21.onPlayerListFull(io.papermc.paper.event.player.PlayerServerFullCheckEvent)']']", priority="HIGH (3)", ignoringCancelled=false}

In my case, it was caused by EssentialsX, and could be fixed by setting use-custom-server-full-message to false in its config.yml.

Fixes#6424 Caused by PaperMC/Paper#13601

FixesEssentialsX#6424 Caused by PaperMC/Paper#13601

Timongcraft · 2026-02-04T18:46:48Z

No description provided.

OtonashiHorobu · 2026-02-05T03:38:10Z

This seems to prevent players from joining in an empty server.

electronicboy · 2026-02-05T04:08:06Z

That is caused by plugins calling the deny method when they're not actually denying the event

SunnyCat95 · 2026-02-05T16:19:07Z

Well, sadly this issue seems not to be resolved.
#106 is crashing mcMMo and not letting it start by the way

and from at least #105 and #104 nobody except Admin (with * permission) can join!
so with #102 it still works fine..

electronicboy · 2026-02-05T16:23:42Z

The "fix" here is making the deny method actually deny connections. The issue is that at least 1 plugin was blindly using the deny method to set the message without the intent to actually deny the connection attempt;

Plugins need to call the deny method if they only intend to actually deny the connection

SunnyCat95 · 2026-02-05T16:26:48Z

The "fix" here is making the deny method actually deny connections. The issue is that at least 1 plugin was blindly using the deny method to set the message without the intent to actually deny the connection attempt;
Plugins need to call the deny method if they only intend to actually deny the connection

So I have to find out which plugin is causing this?
Then I rather stay on 102 and so at least also mcMMo is still working (not working anymore from 106 on)^^

it worked totally fine before and with 103 on it got worse, sadly :(
Not sure what I can and should do now to resolve it and getting the newer paper-versions.^^

Doc94 · 2026-02-05T16:52:56Z

You can find plugins using the event fixed using https://docs.papermc.io/paper/reference/commands/#dumplisteners with that can report to authors for handle.

SwordfishBE · 2026-02-05T17:18:35Z

Also broke my server. This fix should have been considered more carefully. I suspect many users are now experiencing problems.

masmc05 · 2026-02-05T18:10:33Z

You can send the output of the dumplisteners command in discord so someone could help you with this. For example it is already known how to disable the broken feature in essentials as a temporary fix

OtonashiHorobu · 2026-02-06T01:38:08Z

io.papermc.paper.event.player.PlayerServerFullCheckEvent
- RegisteredListener{plugin="Essentials", listener="com.earth2me.essentials.EssentialsPlayerListener$LoginListener1_21@d2db5ab", executor="TimedEventExecutor['MethodHandleEventExecutorTemplate['public void com.earth2me.essentials.EssentialsPlayerListener$LoginListener1_21.onPlayerListFull(io.papermc.paper.event.player.PlayerServerFullCheckEvent)']']", priority="HIGH (3)", ignoringCancelled=false}

In my case, it was caused by EssentialsX, and could be fixed by setting use-custom-server-full-message to false in its config.yml.

Fixes#6424 Caused by PaperMC/Paper#13601

FixesEssentialsX#6424 Caused by PaperMC/Paper#13601

Timongcraft · 2026-02-04T18:46:48Z

No description provided.

OtonashiHorobu · 2026-02-05T03:38:10Z

This seems to prevent players from joining in an empty server.

electronicboy · 2026-02-05T04:08:06Z

That is caused by plugins calling the deny method when they're not actually denying the event

SunnyCat95 · 2026-02-05T16:19:07Z

Well, sadly this issue seems not to be resolved.
#106 is crashing mcMMo and not letting it start by the way

and from at least #105 and #104 nobody except Admin (with * permission) can join!
so with #102 it still works fine..

electronicboy · 2026-02-05T16:23:42Z

The "fix" here is making the deny method actually deny connections. The issue is that at least 1 plugin was blindly using the deny method to set the message without the intent to actually deny the connection attempt;

Plugins need to call the deny method if they only intend to actually deny the connection

SunnyCat95 · 2026-02-05T16:26:48Z

The "fix" here is making the deny method actually deny connections. The issue is that at least 1 plugin was blindly using the deny method to set the message without the intent to actually deny the connection attempt;
Plugins need to call the deny method if they only intend to actually deny the connection

So I have to find out which plugin is causing this?
Then I rather stay on 102 and so at least also mcMMo is still working (not working anymore from 106 on)^^

it worked totally fine before and with 103 on it got worse, sadly :(
Not sure what I can and should do now to resolve it and getting the newer paper-versions.^^

Doc94 · 2026-02-05T16:52:56Z

You can find plugins using the event fixed using https://docs.papermc.io/paper/reference/commands/#dumplisteners with that can report to authors for handle.

SwordfishBE · 2026-02-05T17:18:35Z

Also broke my server. This fix should have been considered more carefully. I suspect many users are now experiencing problems.

masmc05 · 2026-02-05T18:10:33Z

You can send the output of the dumplisteners command in discord so someone could help you with this. For example it is already known how to disable the broken feature in essentials as a temporary fix

OtonashiHorobu · 2026-02-06T01:38:08Z

io.papermc.paper.event.player.PlayerServerFullCheckEvent
- RegisteredListener{plugin="Essentials", listener="com.earth2me.essentials.EssentialsPlayerListener$LoginListener1_21@d2db5ab", executor="TimedEventExecutor['MethodHandleEventExecutorTemplate['public void com.earth2me.essentials.EssentialsPlayerListener$LoginListener1_21.onPlayerListFull(io.papermc.paper.event.player.PlayerServerFullCheckEvent)']']", priority="HIGH (3)", ignoringCancelled=false}

In my case, it was caused by EssentialsX, and could be fixed by setting use-custom-server-full-message to false in its config.yml.

Fixes#6424 Caused by PaperMC/Paper#13601

FixesEssentialsX#6424 Caused by PaperMC/Paper#13601

fix: PlayerServerFullCheckEvent#deny not setting the allow flag
7823a92

Timongcraft requested a review from a team as a code owner February 4, 2026 18:46

github-project-automationBot added this to Paper PR Queue Feb 4, 2026

github-project-automationBot moved this to Awaiting review in Paper PR Queue Feb 4, 2026

electronicboy approved these changes Feb 4, 2026
View reviewed changes

electronicboy merged commit e5718dc into PaperMC:mainFeb 4, 2026
5 checks passed

github-project-automationBot moved this from Awaiting review to Merged in Paper PR Queue Feb 4, 2026

Timongcraft deleted the fix/server-full-check-deny branch February 4, 2026 19:07

JRoy mentioned this pull request Feb 7, 2026
Fix preventing joins when server isn't actually full EssentialsX/Essentials#6426
Merged

github-merge-queueBot pushed a commit to EssentialsX/Essentials that referenced this pull request Feb 7, 2026
Fix preventing joins when server isn't actually full (#6426)
e5c9074
Fixes#6424 Caused by PaperMC/Paper#13601

g0dzcsgo pushed a commit to LemonGamingLtd/EssentialsX that referenced this pull request Feb 7, 2026
Fix preventing joins when server isn't actually full (EssentialsX#6426)
2cbf443
FixesEssentialsX#6424 Caused by PaperMC/Paper#13601

This comment has been minimized.
Sign in to view