Show startup error when tracker server port is in use #206

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MrUnknownDE · 2026-04-05T18:05:43+02:00

MrUnknownDE commented

2026-04-05 18:05:43 +02:00

Originally created by @ImSapphire on 10/26/2025

I'm not sure if this comment about configPath is still cared about.

This issue can happen if an application such as the OTA flasher GUI is open before the SlimeVR server, without this change the server will start with 'SEVERE' lines in the log, but no dialog, so when using the GUI it will go unnoticed (but trackers won't connect)

2025-10-25 17:11:58 [INFO] Using log folder: C:\Users\Sapphire\AppData\Roaming\dev.slimevr.SlimeVR\logs
2025-10-25 17:11:58 [INFO] Running version v0.16.3
2025-10-25 17:11:58 [INFO] Using config dir: C:\Users\Sapphire\AppData\Roaming\dev.slimevr.SlimeVR\vrconfig.yml
2025-10-25 17:11:58 [INFO] Starting the tracker server on port 6969...
2025-10-25 17:11:58 [SEVERE] SLF4J(W): No SLF4J providers were found.
2025-10-25 17:11:58 [SEVERE] SLF4J(W): Defaulting to no-operation (NOP) logger implementation
2025-10-25 17:11:58 [SEVERE] SLF4J(W): See https://www.slf4j.org/codes.html#noProviders for further details.
2025-10-25 17:11:59 [SEVERE] java.net.BindException: Address already in use: bind
2025-10-25 17:11:59 [SEVERE]     at java.base/sun.nio.ch.Net.bind0(Native Method)
2025-10-25 17:11:59 [SEVERE]     at java.base/sun.nio.ch.Net.bind(Net.java:565)
2025-10-25 17:11:59 [SEVERE]     at java.base/sun.nio.ch.DatagramChannelImpl.bindInternal(DatagramChannelImpl.java:1329)
2025-10-25 17:11:59 [SEVERE]     at java.base/sun.nio.ch.DatagramChannelImpl.bind(DatagramChannelImpl.java:1299)
2025-10-25 17:11:59 [SEVERE]     at java.base/sun.nio.ch.DatagramSocketAdaptor.bind(DatagramSocketAdaptor.java:108)
2025-10-25 17:11:59 [SEVERE]     at java.base/java.net.DatagramSocket.createDelegate(DatagramSocket.java:1425)
2025-10-25 17:11:59 [SEVERE]     at java.base/java.net.DatagramSocket.<init>(DatagramSocket.java:328)
2025-10-25 17:11:59 [SEVERE]     at java.base/java.net.DatagramSocket.<init>(DatagramSocket.java:387)
2025-10-25 17:11:59 [SEVERE]     at java.base/java.net.DatagramSocket.<init>(DatagramSocket.java:353)
2025-10-25 17:11:59 [SEVERE]     at dev.slimevr.tracking.trackers.udp.TrackersUDPServer.run(TrackersUDPServer.kt:278)
2025-10-25 17:11:59 [SEVERE] Exception in thread "Sensors UDP server" kotlin.UninitializedPropertyAccessException: lateinit property socket has not been initialized
2025-10-25 17:11:59 [SEVERE]     at dev.slimevr.tracking.trackers.udp.TrackersUDPServer.run(TrackersUDPServer.kt:379)

*Originally created by @ImSapphire on 10/26/2025* I'm not sure if this comment about `configPath` is still cared about. This issue can happen if an application such as the OTA flasher GUI is open before the SlimeVR server, without this change the server will start with 'SEVERE' lines in the log, but no dialog, so when using the GUI it will go unnoticed (but trackers won't connect) ``` 2025-10-25 17:11:58 [INFO] Using log folder: C:\Users\Sapphire\AppData\Roaming\dev.slimevr.SlimeVR\logs 2025-10-25 17:11:58 [INFO] Running version v0.16.3 2025-10-25 17:11:58 [INFO] Using config dir: C:\Users\Sapphire\AppData\Roaming\dev.slimevr.SlimeVR\vrconfig.yml 2025-10-25 17:11:58 [INFO] Starting the tracker server on port 6969... 2025-10-25 17:11:58 [SEVERE] SLF4J(W): No SLF4J providers were found. 2025-10-25 17:11:58 [SEVERE] SLF4J(W): Defaulting to no-operation (NOP) logger implementation 2025-10-25 17:11:58 [SEVERE] SLF4J(W): See https://www.slf4j.org/codes.html#noProviders for further details. 2025-10-25 17:11:59 [SEVERE] java.net.BindException: Address already in use: bind 2025-10-25 17:11:59 [SEVERE] at java.base/sun.nio.ch.Net.bind0(Native Method) 2025-10-25 17:11:59 [SEVERE] at java.base/sun.nio.ch.Net.bind(Net.java:565) 2025-10-25 17:11:59 [SEVERE] at java.base/sun.nio.ch.DatagramChannelImpl.bindInternal(DatagramChannelImpl.java:1329) 2025-10-25 17:11:59 [SEVERE] at java.base/sun.nio.ch.DatagramChannelImpl.bind(DatagramChannelImpl.java:1299) 2025-10-25 17:11:59 [SEVERE] at java.base/sun.nio.ch.DatagramSocketAdaptor.bind(DatagramSocketAdaptor.java:108) 2025-10-25 17:11:59 [SEVERE] at java.base/java.net.DatagramSocket.createDelegate(DatagramSocket.java:1425) 2025-10-25 17:11:59 [SEVERE] at java.base/java.net.DatagramSocket.<init>(DatagramSocket.java:328) 2025-10-25 17:11:59 [SEVERE] at java.base/java.net.DatagramSocket.<init>(DatagramSocket.java:387) 2025-10-25 17:11:59 [SEVERE] at java.base/java.net.DatagramSocket.<init>(DatagramSocket.java:353) 2025-10-25 17:11:59 [SEVERE] at dev.slimevr.tracking.trackers.udp.TrackersUDPServer.run(TrackersUDPServer.kt:278) 2025-10-25 17:11:59 [SEVERE] Exception in thread "Sensors UDP server" kotlin.UninitializedPropertyAccessException: lateinit property socket has not been initialized 2025-10-25 17:11:59 [SEVERE] at dev.slimevr.tracking.trackers.udp.TrackersUDPServer.run(TrackersUDPServer.kt:379) ```

MrUnknownDE closed this issue

2026-04-05 18:05:43 +02:00

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main

sapphire/diy-fw-tool-version-sort

aed/grammar-police

battery-0

bscotch/server-rewrite-temp

hannah/steam

pontoon

hannah/keybinds

server-rewrite

bscotch/accel-mount

dependabot/github_actions/gradle/actions-6

dependabot/github_actions/pnpm/action-setup-5

dependabot/github_actions/actions/upload-artifact-7

dependabot/github_actions/actions/download-artifact-8

FloorClipSteamLinkInteractionFix

sapphire/trim-vrm-json

llelievr/trackers-udp-tests

sapphire/linux-bridge-kotlin

sapphire/linux-vrchat-compatdata-path

smol-sleep-state

sapphire/stay-aligned-setup-no-step-skip

sapphire/steamvr-hands-warning

sapphire/proportions-import-skeleton-request

sapphire/bone-mask-update

llelievr/settings-profiles

bscotch/proguard

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mitten

bscotch/reset-proof-tests

hannah/install-from-server

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TheButlah-patch-1

sapphire/update-solarxr

sapphire/kotlin-flatbuffers

csv-data-export

feat_flashmode

bscotch/remove-drift-compensation

llelievr/kotlin-config

bscotch/fix-osc-duplication

llelievr/keep-battery-value

rest-calibration-support

tracker-graph

fingertracking

update-eslint

tauri-android

hide-new-resets

height-config

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feat/new-updater

support-inches

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accel-mapping-fixes

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Reference: github/SlimeVR-Server#206