Error 400 in backup process with Ionos S3 Object Storage

[dsp76]

Hi @james ,
Hetzner Object Storage ≠ Hetzner Storage Box (thats what I was using as alternative backup target). I didn't try the Object Storage.

@halima632 that was a good hint! Just switched to the IONOS (Profitbricks) entry and it seems to run fine. I didn't know it existed and thought it was "S3 compatible" and fine

[dsp76]

Unfortunately even with the correct IONOS Settings from my Hetzner based Cloudron.

It started crashing again every night since a week now. Thats the anonymised log:

Oct 15 04:12:36 box:backupformat/tgz addToPack: added ./data/public/wp-content/cache/autoptimize/js/autoptimize_snippet_********.js file
Oct 15 04:12:36 box:backupformat/tgz addToPack: added ./data/public/wp-content/cache/autoptimize/js/autoptimize_snippet_********.js file
Oct 15 04:12:36 box:backupformat/tgz addToPack: added ./data/public/wp-content/cache/autoptimize/js/autoptimize_snippet_********.js file
Oct 15 04:12:36 box:backupformat/tgz addToPack: added ./data/public/wp-content/cache/autoptimize/js/autoptimize_snippet_********.js file
Oct 15 04:12:36 box:backupformat/tgz addToPack: added ./data/public/wp-content/cache/autoptimize/js/autoptimize_snippet_********.js file
Oct 15 04:12:36 box:backupformat/tgz addToPack: added ./data/public/wp-content/cache/autoptimize/js/autoptimize_snippet_********.js file
Oct 15 04:12:36 box:backupformat/tgz addToPack: added ./data/public/wp-content/cache/autoptimize/js/autoptimize_snippet_********.js file
Oct 15 04:12:36 box:backupformat/tgz addToPack: added ./data/public/wp-content/cache/autoptimize/js/autoptimize_snippet_********.js file
Oct 15 04:12:36 box:backupformat/tgz addToPack: added ./data/public/wp-content/cache/autoptimize/js/autoptimize_snippet_********.js file
Oct 15 04:12:36 box:backupformat/tgz addToPack: added ./data/public/wp-content/cache/autoptimize/js/autoptimize_snippet_********.js file
Oct 15 04:12:36 box:backupformat/tgz addToPack: added ./data/public/wp-content/cache/autoptimize/js/autoptimize_snippet_********.js file
Oct 15 04:12:36 box:backupformat/tgz addToPack: added ./data/public/wp-content/cache/autoptimize/js/autoptimize_snippet_********.js file
Oct 15 04:12:36 box:backupformat/tgz addToPack: added ./data/public/wp-content/cache/autoptimize/js/autoptimize_snippet_********.js file
Oct 15 04:12:36 box:backupformat/tgz addToPack: added ./data/public/wp-content/cache/autoptimize/js/index.html file
Oct 15 04:12:36 box:backupformat/tgz tarPack: processing /home/***/appsdata/********/data/public/wp-content/cache/borlabs-cookie
Oct 15 04:12:36 box:backupformat/tgz addToPack: added ./data/public/wp-content/cache/borlabs-cookie/1 directory
Oct 15 04:12:36 box:backupformat/tgz addToPack: added ./data/public/wp-content/cache/borlabs-cookie/borlabs-cookie_1_de.css file
Oct 15 04:12:36 box:backupformat/tgz addToPack: added ./data/public/wp-content/cache/borlabs-cookie/borlabs-cookie_1_en.css file
Oct 15 04:12:37 box:backupformat/tgz addToPack: added ./data/public/wp-content/cache/borlabs-cookie/geo-ip-database-********.mmdb file
Oct 15 04:12:37 box:backupformat/tgz tarPack: processing /home/***/appsdata/********/data/public/wp-content/cache/borlabs-cookie/1
Oct 15 04:12:37 box:backupformat/tgz addToPack: added ./data/public/wp-content/cache/borlabs-cookie/1/borlabs-cookie-1-de.css file
Oct 15 04:12:37 box:backupformat/tgz addToPack: added ./data/public/wp-content/cache/borlabs-cookie/1/borlabs-cookie-1-en.css file
Oct 15 04:12:37 box:backupformat/tgz addToPack: added ./data/public/wp-content/cache/borlabs-cookie/1/borlabs-cookie-config-de.json.js file
Oct 15 04:12:37 box:backupformat/tgz addToPack: added ./data/public/wp-content/cache/borlabs-cookie/1/borlabs-cookie-config-en.json.js file
Oct 15 04:12:37 box:backupformat/tgz tarPack: processing /home/***/appsdata/********/data/public/wp-content/cache/matomo
Oct 15 04:12:37 box:backupformat/tgz tarPack: processing /home/***/appsdata/********/data/public/wp-content/infinitewp
Oct 15 04:12:37 box:backupformat/tgz addToPack: added ./data/public/wp-content/infinitewp/backups directory
Oct 15 04:12:37 box:backupformat/tgz addToPack: added ./data/public/wp-content/infinitewp/temp directory
Oct 15 04:12:37 box:backupformat/tgz tarPack: processing /home/***/appsdata/********/data/public/wp-content/infinitewp/backups
Oct 15 04:12:37 box:backupformat/tgz addToPack: added ./data/public/wp-content/infinitewp/backups/DE_clCPUUsage.****.txt file
Oct 15 04:12:37 box:backupformat/tgz addToPack: added ./data/public/wp-content/infinitewp/backups/DE_clMemoryPeak.****.txt file
Oct 15 04:12:37 box:backupformat/tgz addToPack: added ./data/public/wp-content/infinitewp/backups/DE_clMemoryUsage.****.txt file
Oct 15 04:12:37 box:backupformat/tgz addToPack: added ./data/public/wp-content/infinitewp/backups/DE_clTimeTaken.****.txt file
Oct 15 04:12:37 box:backupformat/tgz addToPack: added ./data/public/wp-content/infinitewp/backups/index.php file
Oct 15 04:12:42 box:tasks update ****: {"percent":21.3,"message":"Uploading backup 134M@9MBps (example.com)"}
Oct 15 04:12:42 box:storage/s3 Upload progress: {"loaded":134217728,"part":1,"key":"snapshot/app_********.tar.gz.enc"}
Oct 15 04:12:51 box:storage/s3 Upload progress: {"loaded":268435456,"part":2,"key":"snapshot/app_********.tar.gz.enc"}
Oct 15 04:12:52 box:tasks update ****: {"percent":21.3,"message":"Uploading backup 277M@14MBps (example.com)"}
Oct 15 04:13:02 box:tasks update ****: {"percent":21.3,"message":"Uploading backup 435M@16MBps (example.com)"}
Oct 15 04:13:03 box:backupformat/tgz addToPack: added ./data/public/wp-content/infinitewp/backups/example.com-de_backup_full_****-**-**_********.zip file
Oct 15 04:13:08 box:storage/s3 Upload progress: {"loaded":402653184,"part":4,"key":"snapshot/app_********.tar.gz.enc"}
Oct 15 04:13:12 box:tasks update ****: {"percent":21.3,"message":"Uploading backup 584M@15MBps (example.com)"}
Oct 15 04:13:12 AWS SDK Error: 400 Bad Request
Oct 15 04:13:12 code: 400, statusCode: 400, retryable: false
Oct 15 04:13:12 Node.js v20.18.0
Oct 15 04:13:19 box:shell backuptask: errored BoxError: backuptask exited with code 1 signal null
Oct 15 04:13:19 reason: 'Shell Error', code: 1
Oct 15 04:13:19 box:backuptask runBackupUpload: backuptask crashed BoxError: backuptask exited with code 1 signal null
Oct 15 04:13:19 box:backuptask fullBackup: app example.com backup finished. Took 67.438 seconds
Oct 15 04:13:19 box:tasks update ****: {"percent":100,"error":{"message":"Backuptask crashed"}}
Oct 15 04:13:19 BoxError: Backuptask crashed

Not sure what to do with it. Just started a manual backup, it also crashed again while uploading to IONOS.

Oct 15 11:00:05 400: null
Oct 15 11:00:05 at Request.extractError (/home/yellowtent/box/node_modules/aws-sdk/lib/services/s3.js:712:35)
Oct 15 11:00:05 at Request.callListeners (/home/yellowtent/box/node_modules/aws-sdk/lib/sequential_executor.js:106:20)
Oct 15 11:00:05 at Request.emit (/home/yellowtent/box/node_modules/aws-sdk/lib/sequential_executor.js:78:10)
Oct 15 11:00:05 at Request.emit (/home/yellowtent/box/node_modules/aws-sdk/lib/request.js:686:14)
Oct 15 11:00:05 at Request.transition (/home/yellowtent/box/node_modules/aws-sdk/lib/request.js:22:10)
Oct 15 11:00:05 at AcceptorStateMachine.runTo (/home/yellowtent/box/node_modules/aws-sdk/lib/state_machine.js:14:12)
Oct 15 11:00:05 at /home/yellowtent/box/node_modules/aws-sdk/lib/state_machine.js:26:10
Oct 15 11:00:05 at Request.<anonymous> (/home/yellowtent/box/node_modules/aws-sdk/lib/request.js:38:9)
Oct 15 11:00:05 at Request.<anonymous> (/home/yellowtent/box/node_modules/aws-sdk/lib/request.js:688:12)
Oct 15 11:00:05 at Request.callListeners (/home/yellowtent/box/node_modules/aws-sdk/lib/sequential_executor.js:116:18) {
Oct 15 11:00:05 code: 400,
Oct 15 11:00:05 region: null,
Oct 15 11:00:05 time: 2025-10-15T09:00:05.031Z,
Oct 15 11:00:05 requestId: null,
Oct 15 11:00:05 extendedRequestId: undefined,
Oct 15 11:00:05 cfId: undefined,
Oct 15 11:00:05 statusCode: 400,
Oct 15 11:00:05 retryable: false,
Oct 15 11:00:05 retryDelay: 20000
Oct 15 11:00:05 }

and

Oct 15 11:00:05 box:tasks setCompleted - 7460: {"result":null,"error":{"stack":"BoxError: Backuptask crashed\n at runBackupUpload (/home/yellowtent/box/src/backuptask.js:170:15)\n at process.processTicksAndRejections (node:internal/process/task_queues:95:5)\n at async uploadAppSnapshot (/home/yellowtent/box/src/backuptask.js:369:5)\n at async backupAppWithTag (/home/yellowtent/box/src/backuptask.js:391:5)","name":"BoxError","reason":"Internal Error","details":{},"message":"Backuptask crashed"}}
Oct 15 11:00:05 box:tasks update 7460: {"percent":100,"result":null,"error":{"stack":"BoxError: Backuptask crashed\n at runBackupUpload (/home/yellowtent/box/src/backuptask.js:170:15)\n at process.processTicksAndRejections (node:internal/process/task_queues:95:5)\n at async uploadAppSnapshot (/home/yellowtent/box/src/backuptask.js:369:5)\n at async backupAppWithTag (/home/yellowtent/box/src/backuptask.js:391:5)","name":"BoxError","reason":"Internal Error","details":{},"message":"Backuptask crashed"}}
Oct 15 11:00:05 BoxError: Backuptask crashed

The snapshot folder within the bucket (created by cloudron?) contains a couple of up to date uploads.

• Who should I with - is it IONOS? Is it cloudron? Is it Hetzner?
• Whats causing the "internal error" while uploading?
• Why is it "retryable: false"?

[dsp76]

Can I mark this as unsolved again?

[james]

Hello @dsp76 I have marked to topic as unsolved again.
Where you unable to do this yourself or was this more of a courtesy question?

[girish]

@dsp76 the retryable comes the aws sdk . It's indicating whether we should retry a failing request or not. Since retryable is false, the code gives up immediately.

Can you write to us at support@cloudron.io ? We have to debug this further to understand which request is failing and why .

[dsp76]

@james I didn't find the place where I could do it.
@girish will write you!

[CaeruleusAqua]

I've had the same problem since a week ago. The strange thing is that everything had been running flawlessly for a year. However, we recently set up a second Cloudron. The backup is stored on a different bucket and also has its own key. The problem occurs on both servers. Unfortunately, it's not deterministic.

 03:00:33 box:storage/s3 Upload progress: {"loaded":95400493056,"part":920,"key":"backup/snapshot/app_da39dd94-29b5-4049-9aa5-76864ebc4608.tar.gz.enc"}
Oct 16 03:00:33 /home/yellowtent/box/node_modules/aws-sdk/lib/services/s3.js:712
Oct 16 03:00:33 resp.error = AWS.util.error(new Error(), {
Oct 16 03:00:33 ^
Oct 16 03:00:33
Oct 16 03:00:33 400: null
Oct 16 03:00:33 at Request.extractError (/home/yellowtent/box/node_modules/aws-sdk/lib/services/s3.js:712:35)
Oct 16 03:00:33 at Request.callListeners (/home/yellowtent/box/node_modules/aws-sdk/lib/sequential_executor.js:106:20)
Oct 16 03:00:33 at Request.emit (/home/yellowtent/box/node_modules/aws-sdk/lib/sequential_executor.js:78:10)
Oct 16 03:00:33 at Request.emit (/home/yellowtent/box/node_modules/aws-sdk/lib/request.js:686:14)
Oct 16 03:00:33 at Request.transition (/home/yellowtent/box/node_modules/aws-sdk/lib/request.js:22:10)
Oct 16 03:00:33 at AcceptorStateMachine.runTo (/home/yellowtent/box/node_modules/aws-sdk/lib/state_machine.js:14:12)
Oct 16 03:00:33 at /home/yellowtent/box/node_modules/aws-sdk/lib/state_machine.js:26:10
Oct 16 03:00:33 at Request.<anonymous> (/home/yellowtent/box/node_modules/aws-sdk/lib/request.js:38:9)
Oct 16 03:00:33 at Request.<anonymous> (/home/yellowtent/box/node_modules/aws-sdk/lib/request.js:688:12)
Oct 16 03:00:33 at Request.callListeners (/home/yellowtent/box/node_modules/aws-sdk/lib/sequential_executor.js:116:18) {
Oct 16 03:00:33 code: 400,
Oct 16 03:00:33 region: null,
Oct 16 03:00:33 time: 2025-10-16T01:00:34.559Z,
Oct 16 03:00:33 requestId: null,
Oct 16 03:00:33 extendedRequestId: undefined,
Oct 16 03:00:33 cfId: undefined,
Oct 16 03:00:33 statusCode: 400,
Oct 16 03:00:33 retryable: false,
Oct 16 03:00:33 retryDelay: 20000
Oct 16 03:00:33 }
Oct 16 03:00:33
Oct 16 03:00:33 Node.js v20.18.0
Oct 16 03:00:34 box:shell backuptask: /usr/bin/sudo -S -E --close-from=4 /home/yellowtent/box/src/scripts/backupupload.js snapshot/app_da39dd94-29b5-4049-9aa5-76864ebc4608 tgz {"localRoot":"/home/yellowtent/appsdata/da39dd94-29b5-4049-9aa5-76864ebc4608","layout":[]} errored BoxError: backuptask exited with code 1 signal null
Oct 16 03:00:34 at ChildProcess.<anonymous> (/home/yellowtent/box/src/shell.js:137:19)
Oct 16 03:00:34 at ChildProcess.emit (node:events:519:28)
Oct 16 03:00:34 at ChildProcess.emit (node:domain:488:12)
Oct 16 03:00:34 at ChildProcess._handle.onexit (node:internal/child_process:294:12) {
Oct 16 03:00:34 reason: 'Shell Error',
Oct 16 03:00:34 details: {},
Oct 16 03:00:34 code: 1,
Oct 16 03:00:34 signal: null
Oct 16 03:00:34 }
Oct 16 03:00:34 box:backuptask runBackupUpload: backuptask crashed BoxError: backuptask exited with code 1 signal null
Oct 16 03:00:34 at ChildProcess.<anonymous> (/home/yellowtent/box/src/shell.js:137:19)
Oct 16 03:00:34 at ChildProcess.emit (node:events:519:28)
Oct 16 03:00:34 at ChildProcess.emit (node:domain:488:12)
Oct 16 03:00:34 at ChildProcess._handle.onexit (node:internal/child_process:294:12) {
Oct 16 03:00:34 reason: 'Shell Error',
Oct 16 03:00:34 details: {},
Oct 16 03:00:34 code: 1,
Oct 16 03:00:34 signal: null
Oct 16 03:00:34 }

[joseph]

@CaeruleusAqua which S3 provider are you using?

[james]

Marking as solved due to inactivity.

[dsp76]

@james it still happens sometimes. I did more investigation in the log. It says in between it couldn't find the file ("Old backup not found").

Jan 14 05:26:29 box:storage/s3 Upload progress: {"loaded":40692513140,"part":304,"Key":"snapshot/app_APP_UUID_01.tar.gz.enc","Bucket":"ACME-BACKUP"}
Jan 14 05:47:09 box:storage/s3 Upload finished. {"$metadata":{"httpStatusCode":200,"requestId":"REQUEST_ID_01-ACCOUNT_01-REGION_01","attempts":3,"totalRetryDelay":40000},"Bucket":"ACME-BACKUP","ETag":"\"\"","Key":"snapshot/app_APP_UUID_01.tar.gz.enc","Location":"S3_ENDPOINT_01/ACME-BACKUP/snapshot/app_APP_UUID_01.tar.gz.enc"}
Jan 14 05:47:09 box:backuptask upload: path snapshot/app_APP_UUID_01.tar.gz.enc site SITE_UUID_01 uploaded: {"fileCount":11571,"size":40692513140,"transferred":40692513140}
Jan 14 05:47:09 box:tasks updating task TASK_ID_01 with: {"percent":75.1935483870967,"message":"Uploading integrity information to snapshot/app_APP_UUID_01.tar.gz.enc.backupinfo (REGISTRY.DOMAIN.TLD)"}
Jan 14 05:47:10 box:storage/s3 Upload progress: {"loaded":146,"total":146,"part":1,"Key":"snapshot/app_APP_UUID_01.tar.gz.enc.backupinfo","Bucket":"ACME-BACKUP"}
Jan 14 05:47:10 box:storage/s3 Upload finished. {"$metadata":{"httpStatusCode":200,"requestId":"REQUEST_ID_02-ACCOUNT_02-REGION_01","attempts":1,"totalRetryDelay":0},"ETag":"\"ETAG_01\"","Bucket":"ACME-BACKUP","Key":"snapshot/app_APP_UUID_01.tar.gz.enc.backupinfo","Location":"https://ACME-BACKUP.s3.REGION_01.ionoscloud.com/snapshot/app_APP_UUID_01.tar.gz.enc.backupinfo"}
Jan 14 05:47:10 box:backupupload upload completed. error: null
Jan 14 05:47:10 box:backuptask runBackupUpload: result - {"result":{"stats":{"fileCount":11571,"size":40692513140,"transferred":40692513140},"integrity":{"signature":"SIGNATURE_01"}}}
Jan 14 05:47:10 box:backuptask uploadAppSnapshot: REGISTRY.DOMAIN.TLD uploaded to snapshot/app_APP_UUID_01.tar.gz.enc. 4202.695 seconds
Jan 14 05:47:10 box:backuptask backupAppWithTag: rotating REGISTRY.DOMAIN.TLD snapshot of SITE_UUID_01 to path 2026-01-14-030000-896/app_REGISTRY.DOMAIN.TLD_VERSION_01.tar.gz.enc
Jan 14 05:47:10 box:tasks updating task TASK_ID_01 with: {"percent":75.1935483870967,"message":"Copying (multipart) snapshot/app_APP_UUID_01.tar.gz.enc"}
Jan 14 05:47:10 box:tasks updating task TASK_ID_01 with: {"percent":75.1935483870967,"message":"Copying part 1 - ACME-BACKUP/snapshot/app_APP_UUID_01.tar.gz.enc bytes=0-1073741823"}
Jan 14 05:47:10 box:tasks updating task TASK_ID_01 with: {"percent":75.1935483870967,"message":"Copying part 2 - ACME-BACKUP/snapshot/app_APP_UUID_01.tar.gz.enc bytes=1073741824-2147483647"}
Jan 14 05:47:10 box:tasks updating task TASK_ID_01 with: {"percent":75.1935483870967,"message":"Copying part 3 - ACME-BACKUP/snapshot/app_APP_UUID_01.tar.gz.enc bytes=2147483648-3221225471"}
Jan 14 05:47:10 box:tasks updating task TASK_ID_01 with: {"percent":75.1935483870967,"message":"Aborting multipart copy of snapshot/app_APP_UUID_01.tar.gz.enc"}
Jan 14 05:47:10 box:storage/s3 copy: s3 copy error when copying snapshot/app_APP_UUID_01.tar.gz.enc: NoSuchKey: UnknownError
Jan 14 05:47:10 box:backuptask copy: copy to 2026-01-14-030000-896/app_REGISTRY.DOMAIN.TLD_VERSION_01.tar.gz.enc errored. error: Old backup not found: snapshot/app_APP_UUID_01.tar.gz.enc
Jan 14 05:47:10 box:backuptask fullBackup: app REGISTRY.DOMAIN.TLD backup finished. Took 4203.103 seconds
Jan 14 05:47:10 box:locks write: current locks: {"full_backup_task_SITE_UUID_01":null}
Jan 14 05:47:10 box:locks release: app_backup_APP_UUID_01
Jan 14 05:47:10 box:tasks setCompleted - TASK_ID_01: {"result":null,"error":{"message":"Old backup not found: snapshot/app_APP_UUID_01.tar.gz.enc","reason":"Not found"},"percent":100}
Jan 14 05:47:10 box:tasks updating task TASK_ID_01 with: {"completed":true,"result":null,"error":{"message":"Old backup not found: snapshot/app_APP_UUID_01.tar.gz.enc","reason":"Not found"},"percent":100}
Jan 14 05:47:10 box:taskworker Task took 6429.474 seconds
Jan 14 05:47:10 BoxError: Old backup not found: snapshot/app_APP_UUID_01.tar.gz.enc
Jan 14 05:47:10 at throwError (/home/yellowtent/box/src/storage/s3.js:387:49)
Jan 14 05:47:10 at copyInternal (/home/yellowtent/box/src/storage/s3.js:454:16)
Jan 14 05:47:10 at process.processTicksAndRejections (node:internal/process/task_queues:105:5)
Jan 14 05:47:10 at async Object.copy (/home/yellowtent/box/src/storage/s3.js:488:12)
Jan 14 05:47:10 at async Object.copy (/home/yellowtent/box/src/backupformat/tgz.js:282:5)
Jan 14 05:47:10 Exiting with code 0

I checked the bucket and can see its still there:

app_APP_UUID_01.tar.gz.enc 37.90 GB 14.1.2026, 05:36:49
app_APP_UUID_01.tar.gz.enc.backupinfo 146 bytes 14.1.2026, 05:47:09

Please also check the timestamps.

Whats causing the the process is not finding the file and stopping the process?

[nebulon]

So the actual app_APP_UUID_01.tar.gz.enc was created prior to the multiparty copy attempt. Also it seems first two parts were copied fine and suddenly the S3 object cannot be found anymore for a brief period? Is this easily reproducible or more of an occasional hiccup?