Bug: Valkey Admin throws massive UTF‑8 decoding errors, JSON.TYPE unknown command, and inconsistent metrics URI behavior

[masterwishx]

Before submitting

• I searched existing issues and didn't find a duplicate

What happened?

Summary

Valkey Admin appears to work overall, but it logs a large number of errors that suggest incorrect decoding of binary values, inconsistent metrics server detection, and failure to recognize JSON.TYPE even when the server is healthy.

These errors occur even though the Valkey instance is reachable and functional.

Environment

• Valkey Admin version: latest
• Valkey server version: latest
• Deployment: Docker
• OS: Unraid

Issues Observed

1. Massive UTF‑8 decoding errors for binary keys

Valkey Admin repeatedly logs errors like:

Unable to resolve hostname or IP: Error: getHostByAddr ENOTFOUND 192.168.0.199
    at QueryReqWrap.onresolve [as oncomplete] (node:internal/dns/promises:295:17) {
  errno: undefined,
  code: 'ENOTFOUND',
  syscall: 'getHostByAddr',
  hostname: '192.168.0.199'
}
Starting metrics server for:  192-168-0-199-6379
Connected to standalone
2026-09-13T09:14:26.673102Z  WARN logger_core: received error - An error was signalled by the server: - ResponseError: unknown command 'JSON.TYPE', with args beginning with: 'nonexistent_key' 
Error: Metrics server URI not found
    at setDashboardData (file:///app/apps/server/dist/index.js:1097:40)
    at file:///app/apps/server/dist/index.js:1379:11
    at file:///app/apps/server/dist/index.js:1040:16
    at WebSocket.<anonymous> (file:///app/apps/server/dist/index.js:3422:8)
    at WebSocket.emit (node:events:519:28)
    at Receiver.receiverOnMessage (/app/node_modules/ws/lib/websocket.js:1239:20)
    at Receiver.emit (node:events:519:28)
    at Receiver.dataMessage (/app/node_modules/ws/lib/receiver.js:633:14)
    at Receiver.getData (/app/node_modules/ws/lib/receiver.js:532:10)
    at Receiver.startLoop (/app/node_modules/ws/lib/receiver.js:190:16)
Error: Metrics server URI not found
    at setDashboardData (file:///app/apps/server/dist/index.js:1097:40)
    at file:///app/apps/server/dist/index.js:1379:11
    at file:///app/apps/server/dist/index.js:1040:16
    at WebSocket.<anonymous> (file:///app/apps/server/dist/index.js:3422:8)
    at WebSocket.emit (node:events:519:28)
    at Receiver.receiverOnMessage (/app/node_modules/ws/lib/websocket.js:1239:20)
    at Receiver.emit (node:events:519:28)
    at Receiver.dataMessage (/app/node_modules/ws/lib/receiver.js:633:14)
    at Receiver.getData (/app/node_modules/ws/lib/receiver.js:532:10)
    at Receiver.startLoop (/app/node_modules/ws/lib/receiver.js:190:16)
Metrics server registered for 192-168-0-199-6379 at http://127.0.0.1:33605/
2026-09-13T09:14:37.816220Z ERROR logger_core: Decoder - Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 0'
2026-09-13T09:14:37.816256Z ERROR logger_core: Decoder - Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 2'
2026-09-13T09:14:37.816275Z ERROR logger_core: Decoder - Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 0'
2026-09-13T09:14:37.816293Z ERROR logger_core: Decoder - Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 0'
Could not get elements for key authelia-session:yl$zuDrAhmMkRbtqgd!AvnOCYyaoNJbN: Error: Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 0'. 
 NOTE: If this was thrown during a command with write operations, the data could be UNRECOVERABLY LOST.
    at GlideClient.processResponse (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:398:23)
    at GlideClient.handleReadData (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:293:22)
    at Socket.<anonymous> (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:437:40)
    at Socket.emit (node:events:519:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Could not get elements for key authelia-session:2GR^6$e55%Z^8$mWZrQG9zC-xNTNu##d: Error: Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 2'. 
 NOTE: If this was thrown during a command with write operations, the data could be UNRECOVERABLY LOST.
    at GlideClient.processResponse (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:398:23)
    at GlideClient.handleReadData (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:293:22)
    at Socket.<anonymous> (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:437:40)
    at Socket.emit (node:events:519:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Could not get elements for key authelia-session:7h2Cbs5SE$4mwyN0C%^KRNZv%Kr*OuPx: Error: Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 0'. 
 NOTE: If this was thrown during a command with write operations, the data could be UNRECOVERABLY LOST.
    at GlideClient.processResponse (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:398:23)
    at GlideClient.handleReadData (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:293:22)
    at Socket.<anonymous> (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:437:40)
    at Socket.emit (node:events:519:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Could not get elements for key authelia-session:1$edkIPTqeXoYqmgrFt9g-Mc_ZIpJO-S: Error: Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 0'. 
 NOTE: If this was thrown during a command with write operations, the data could be UNRECOVERABLY LOST.
    at GlideClient.processResponse (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:398:23)
    at GlideClient.handleReadData (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:293:22)
    at Socket.<anonymous> (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:437:40)
    at Socket.emit (node:events:519:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
2026-09-13T09:14:37.817821Z ERROR logger_core: Decoder - Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 2'
2026-09-13T09:14:37.817857Z ERROR logger_core: Decoder - Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 0'
2026-09-13T09:14:37.817878Z ERROR logger_core: Decoder - Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 0'
2026-09-13T09:14:37.817902Z ERROR logger_core: Decoder - Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 3'
Could not get elements for key authelia-session:WvDnh4dlZLopkkLcfESo4x5LAWY2l^r0: Error: Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 2'. 
 NOTE: If this was thrown during a command with write operations, the data could be UNRECOVERABLY LOST.
    at GlideClient.processResponse (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:398:23)
    at GlideClient.handleReadData (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:293:22)
    at Socket.<anonymous> (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:437:40)
    at Socket.emit (node:events:519:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Could not get elements for key authelia-session:0_qCHaVGgLzP_oetpGH%aRAI7p!FILXf: Error: Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 0'. 
 NOTE: If this was thrown during a command with write operations, the data could be UNRECOVERABLY LOST.
    at GlideClient.processResponse (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:398:23)
    at GlideClient.handleReadData (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:293:22)
    at Socket.<anonymous> (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:437:40)
    at Socket.emit (node:events:519:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Could not get elements for key authelia-session:os^QwteT0!6O*OSM#kYEU!!KuZaYh^qk: Error: Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 0'. 
 NOTE: If this was thrown during a command with write operations, the data could be UNRECOVERABLY LOST.
    at GlideClient.processResponse (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:398:23)
    at GlideClient.handleReadData (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:293:22)
    at Socket.<anonymous> (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:437:40)
    at Socket.emit (node:events:519:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Could not get elements for key authelia-session:HGqOPuOtyDywEpYbdPS$t^xybH^_yPvQ: Error: Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 3'. 
 NOTE: If this was thrown during a command with write operations, the data could be UNRECOVERABLY LOST.
    at GlideClient.processResponse (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:398:23)
    at GlideClient.handleReadData (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:293:22)
    at Socket.<anonymous> (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:437:40)
    at Socket.emit (node:events:519:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
2026-09-13T09:14:37.818516Z ERROR logger_core: Decoder - Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 0'
2026-09-13T09:14:37.818538Z ERROR logger_core: Decoder - Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 1'
Could not get elements for key authelia-session:Ujp3hU0yFBu3PzItnEFF$#Z#oD4T9ix2: Error: Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 0'. 
 NOTE: If this was thrown during a command with write operations, the data could be UNRECOVERABLY LOST.
    at GlideClient.processResponse (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:398:23)
    at GlideClient.handleReadData (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:293:22)
    at Socket.<anonymous> (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:437:40)
    at Socket.emit (node:events:519:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Could not get elements for key authelia-session:vzHQPbxsyGzE^DFFsrsJOoixPZ9zgRPg: Error: Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 1'. 
 NOTE: If this was thrown during a command with write operations, the data could be UNRECOVERABLY LOST.
    at GlideClient.processResponse (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:398:23)
    at GlideClient.handleReadData (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:293:22)
    at Socket.<anonymous> (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:437:40)
    at Socket.emit (node:events:519:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
2026-09-13T09:14:37.818847Z ERROR logger_core: Decoder - Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 0'
Could not get elements for key authelia-session:Vn!73-Wbi8Jop-Rd8OQ#yy7cnE%-Fti*: Error: Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 0'. 
 NOTE: If this was thrown during a command with write operations, the data could be UNRECOVERABLY LOST.
    at GlideClient.processResponse (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:398:23)
    at GlideClient.handleReadData (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:293:22)
    at Socket.<anonymous> (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:437:40)
    at Socket.emit (node:events:519:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
2026-09-13T09:14:37.819937Z ERROR logger_core: Decoder - Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 1'
2026-09-13T09:14:37.819961Z ERROR logger_core: Decoder - Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 0'
2026-09-13T09:14:37.819980Z ERROR logger_core: Decoder - Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 0'
Could not get elements for key authelia-session:qwSF%DDHIJamsnJbFJGBD0B^Ld7JZtLK: Error: Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 1'. 
 NOTE: If this was thrown during a command with write operations, the data could be UNRECOVERABLY LOST.
    at GlideClient.processResponse (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:398:23)
    at GlideClient.handleReadData (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:293:22)
    at Socket.<anonymous> (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:437:40)
    at Socket.emit (node:events:519:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Could not get elements for key authelia-session:#sszDT%yDY2AejSKZKb0llrdMMVn1-yR: Error: Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 0'. 
 NOTE: If this was thrown during a command with write operations, the data could be UNRECOVERABLY LOST.
    at GlideClient.processResponse (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:398:23)
    at GlideClient.handleReadData (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:293:22)
    at Socket.<anonymous> (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:437:40)
    at Socket.emit (node:events:519:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Could not get elements for key authelia-session:pIn4tYOvShZXDAvow8PKAzeI0On5NX2F: Error: Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 0'. 
 NOTE: If this was thrown during a command with write operations, the data could be UNRECOVERABLY LOST.
    at GlideClient.processResponse (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:398:23)
    at GlideClient.handleReadData (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:293:22)
    at Socket.<anonymous> (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:437:40)
    at Socket.emit (node:events:519:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
2026-09-13T09:14:37.820560Z ERROR logger_core: Decoder - Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 5'
2026-09-13T09:14:37.820595Z ERROR logger_core: Decoder - Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 0'
2026-09-13T09:14:37.820615Z ERROR logger_core: Decoder - Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 0'
Could not get elements for key authelia-session:c8wMyfrVXYlipe_u5R!gvrIEtILEifMg: Error: Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 5'. 
 NOTE: If this was thrown during a command with write operations, the data could be UNRECOVERABLY LOST.
    at GlideClient.processResponse (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:398:23)
    at GlideClient.handleReadData (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:293:22)
    at Socket.<anonymous> (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:437:40)
    at Socket.emit (node:events:519:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Could not get elements for key authelia-session:7o2CxrEd%eRz%eSrW_JJAhqGmZA1sEx-: Error: Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 0'. 
 NOTE: If this was thrown during a command with write operations, the data could be UNRECOVERABLY LOST.
    at GlideClient.processResponse (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:398:23)
    at GlideClient.handleReadData (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:293:22)
    at Socket.<anonymous> (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:437:40)
    at Socket.emit (node:events:519:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Could not get elements for key authelia-session:c1PgU*fMElz4Z%H2BNtHNuVEm!Dvta5*: Error: Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 0'. 
 NOTE: If this was thrown during a command with write operations, the data could be UNRECOVERABLY LOST.
    at GlideClient.processResponse (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:398:23)
    at GlideClient.handleReadData (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:293:22)
    at Socket.<anonymous> (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:437:40)
    at Socket.emit (node:events:519:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
2026-09-13T09:14:37.820892Z ERROR logger_core: Decoder - Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 2'
Could not get elements for key authelia-session:xhsLiaEMMq98hGvzCHQeC!EgyWT4eyp2: Error: Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 2'. 
 NOTE: If this was thrown during a command with write operations, the data could be UNRECOVERABLY LOST.
    at GlideClient.processResponse (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:398:23)
    at GlideClient.handleReadData (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:293:22)
    at Socket.<anonymous> (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:437:40)
    at Socket.emit (node:events:519:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
2026-09-13T09:14:37.821986Z ERROR logger_core: Decoder - Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 0'
2026-09-13T09:14:37.822009Z ERROR logger_core: Decoder - Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 3'
2026-09-13T09:14:37.822026Z ERROR logger_core: Decoder - Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 2'
Could not get elements for key authelia-session:Swnk95_vT9dDO^qJFnT$Sdn57Error: Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 0'. 
 NOTE: If this was thrown during a command with write operations, the data could be UNRECOVERABLY LOST.
    at GlideClient.processResponse (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:398:23)
    at GlideClient.handleReadData (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:293:22)
    at Socket.<anonymous> (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:437:40)
    at Socket.emit (node:events:519:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)5L8B$:
Could not get elements for key authelia-session:2nQGb!8ya0PlNze9eY2ddevMmgFQC9h8: Error: Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 3'. 
 NOTE: If this was thrown during a command with write operations, the data could be UNRECOVERABLY LOST.
    at GlideClient.processResponse (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:398:23)
    at GlideClient.handleReadData (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:293:22)
    at Socket.<anonymous> (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:437:40)
    at Socket.emit (node:events:519:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Could not get elements for key authelia-session:8Xa1qnCbW2NG^Gh4pGNBeTM^gv6EMCPN: Error: Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 2'. 
 NOTE: If this was thrown during a command with write operations, the data could be UNRECOVERABLY LOST.
    at GlideClient.processResponse (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:398:23)
    at GlideClient.handleReadData (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:293:22)
    at Socket.<anonymous> (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:437:40)
    at Socket.emit (node:events:519:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
2026-09-13T09:14:37.822309Z ERROR logger_core: Decoder - Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 2'
2026-09-13T09:14:37.822350Z ERROR logger_core: Decoder - Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 0'
Could not get elements for key authelia-session:KBHeV7_5qhY2yGihNL8DtvL%yTfekvmN: Error: Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 2'. 
 NOTE: If this was thrown during a command with write operations, the data could be UNRECOVERABLY LOST.
    at GlideClient.processResponse (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:398:23)
    at GlideClient.handleReadData (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:293:22)
    at Socket.<anonymous> (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:437:40)
    at Socket.emit (node:events:519:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Could not get elements for key authelia-session:LmGaypNExEorb^!jgF0MgMflw4X23v!2: Error: Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 0'. 
 NOTE: If this was thrown during a command with write operations, the data could be UNRECOVERABLY LOST.
    at GlideClient.processResponse (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:398:23)
    at GlideClient.handleReadData (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:293:22)
    at Socket.<anonymous> (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:437:40)
    at Socket.emit (node:events:519:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
2026-09-13T09:14:37.822575Z ERROR logger_core: Decoder - Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 0'
Could not get elements for key authelia-session:O{}NoKd75T#ZdTKGh8aKNJ*kcOEweFGr:
2026-09-13T09:14:37.822801Z ERROR logger_core: Decoder - Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 2'
2026-09-13T09:14:37.822819Z ERROR logger_core: Decoder - Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 2'
Could not get elements for key authelia-session:FDuL-BoDSS_aekt#K2bDY_dyqVhuL7ig: Error: Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 2'. 
 NOTE: If this was thrown during a command with write operations, the data could be UNRECOVERABLY LOST.
    at GlideClient.processResponse (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:398:23)
    at GlideClient.handleReadData (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:293:22)
    at Socket.<anonymous> (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:437:40)
    at Socket.emit (node:events:519:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Could not get elements for key authelia-session:arUt^-mZX5zeeWFly%$NDjcV8efrQ^vq: Error: Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 2'. 
 NOTE: If this was thrown during a command with write operations, the data could be UNRECOVERABLY LOST.
    at GlideClient.processResponse (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:398:23)
    at GlideClient.handleReadData (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:293:22)
    at Socket.<anonymous> (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:437:40)
    at Socket.emit (node:events:519:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
2026-09-13T09:14:37.823638Z ERROR logger_core: Decoder - Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 0'
2026-09-13T09:14:37.823668Z ERROR logger_core: Decoder - Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 0'
2026-09-13T09:14:37.823685Z ERROR logger_core: Decoder - Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 2'
2026-09-13T09:14:37.823703Z ERROR logger_core: Decoder - Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 0'
2026-09-13T09:14:37.823720Z ERROR logger_core: Decoder - Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 0'
Could not get elements for key authelia-session:wwgceQ*f8jwRj_^gyNTRqUKOeTTGUI4k: Error: Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 0'. 
 NOTE: If this was thrown during a command with write operations, the data could be UNRECOVERABLY LOST.
    at GlideClient.processResponse (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:398:23)
    at GlideClient.handleReadData (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:293:22)
    at Socket.<anonymous> (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:437:40)
    at Socket.emit (node:events:519:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Could not get elements for key authelia-session:hprg9hlv*A6jrM4%B*IN7dlSSk00u^u!: Error: Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 0'. 
 NOTE: If this was thrown during a command with write operations, the data could be UNRECOVERABLY LOST.
    at GlideClient.processResponse (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:398:23)
    at GlideClient.handleReadData (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:293:22)
    at Socket.<anonymous> (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:437:40)
    at Socket.emit (node:events:519:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Could not get elements for key authelia-session:uf*^UBG4he#UprWBgIICIlKenmKgl4vz: Error: Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 2'. 
 NOTE: If this was thrown during a command with write operations, the data could be UNRECOVERABLY LOST.
    at GlideClient.processResponse (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:398:23)
    at GlideClient.handleReadData (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:293:22)
    at Socket.<anonymous> (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:437:40)
    at Socket.emit (node:events:519:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Could not get elements for key authelia-session:Qo7JV%0E5$ouUlnh$GCrMh%TdgrbyB8K: Error: Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 0'. 
 NOTE: If this was thrown during a command with write operations, the data could be UNRECOVERABLY LOST.
    at GlideClient.processResponse (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:398:23)
    at GlideClient.handleReadData (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:293:22)
    at Socket.<anonymous> (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:437:40)
    at Socket.emit (node:events:519:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Could not get elements for key authelia-session:ABTB03fkPHf$NT5jonkhefxdfY5GZyzs: Error: Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 0'. 
 NOTE: If this was thrown during a command with write operations, the data could be UNRECOVERABLY LOST.
    at GlideClient.processResponse (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:398:23)
    at GlideClient.handleReadData (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:293:22)
    at Socket.<anonymous> (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:437:40)
    at Socket.emit (node:events:519:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
2026-09-13T09:14:37.824115Z ERROR logger_core: Decoder - Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 2'
2026-09-13T09:14:37.824135Z ERROR logger_core: Decoder - Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 1'
Could not get elements for key authelia-session:-eqjAVod%rGCjA$HtaC3R*$ZKs2VPpMC: Error: Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 2'. 
 NOTE: If this was thrown during a command with write operations, the data could be UNRECOVERABLY LOST.
    at GlideClient.processResponse (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:398:23)
    at GlideClient.handleReadData (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:293:22)
    at Socket.<anonymous> (/app/node_modules/@valkey/valkey-glide/build-ts/BaseClient.js:437:40)
    at Socket.emit (node:events:519:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Could not get elements for key authelia-session:2Tnq3n8R66TGK4K7AUGBUDdPQO^xnxVT: Error: Decoding error: 'Error: invalid utf-8 sequence of 1 bytes from index 1'.

Expected behavior

No response

Deployment

Web (Docker)

Version

latest

Screenshots

No response

[nassery318]

Thanks @masterwishx for the detailed report and the logs. They made this easy to trace, and we appreciate you taking the time to file it.

  Here's what we found. None of these seem to affect Valkey itself, but they're worth cleaning up:

  1. UTF‑8 decoding errors: Valkey Admin reads values as text by default, so binary values like Authelia's session data fail to decode. For string keys we already fall back to showing an escaped version, but the error is still logged with a full stack trace for every key, which is where the noise comes from. We'll fix this by quieting the logs and extending the fallback to other key types (hash, set, list and so on), which currently show "not readable".

  2. unknown command 'JSON.TYPE': this is our check for whether the JSON module is loaded. On servers without it, the command fails as expected and the client library logs a warning. It's harmless, but misleading, so we're replacing the check with one that doesn't cause an error and logs a clear "JSON module available / not available" message instead.

  3. "Metrics server URI not found": the dashboard asks for data a moment before the metrics collector finishes registering, and then retries automatically. That's why you also see the "registered" line right after. It's mostly noise, so we'll stop logging it as an error. If the dashboard ever stays stuck without data, please let us know, because that would point to a real startup delay.

  Two quick questions to help us confirm:
  - What type are the Authelia keys? (TYPE authelia-session:)
  - Is anything actually broken in the UI, or is it just the log noise?

Please feel free to submit a PR for addressing the points above.

Thanks again!

[masterwishx]

• Is anything actually broken in the UI, or is it just the log noise?

No, nothing broken in the UI, it seems just a log noise.

I will send Authelia example keys type later...

[masterwishx]

Two quick questions to help us confirm:
  - What type are the Authelia keys? (TYPE authelia-session:)

Authelia-session has : STRING type for all values

[hoangphuocbk]

I also hit this bug when opening the Key Browser tab.

[nassery318]

Thanks for reporting this, @masterwishx and @hoangphuocbk.

A fix is available in #520. It handles binary values in string keys and removes the related log noise from the server terminal.

A couple of things to note:

• Binary string values are now read-only in the Key Browser. Previously, saving a binary value would replace the raw bytes with the escaped text displayed in the UI, potentially corrupting the value. If a binary key was edited before this fix, its value may already have been affected.
• Binary data in hashes, lists, sets, sorted sets, and streams will still display as "Not human readable". Support for those data types is being tracked separately.