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1f8664d7f8
I encountered with the following error: > 2023/02/05 07:33:00 /app/scanner/face_detection/face_detector.go:92 sql: transaction has already been committed or rolled back > [0.042ms] [rows:0] SELECT * FROM `media` WHERE `media`.`id` = 823 ORDER BY `media`.`id` LIMIT 1 > 2023/02/05 07:33:00 ERROR: Error detecting faces in image (/photos/Borzsony2017/DSC_0028.NEF): sql: transaction has already been committed or rolled back It turned out it comes from the api/routes/photos.go I found a very similar code in album_scanner.go. The difference I saw was that while in the single photo request the transaction passed to the `scanner_tasks.Tasks.BeforeProcessMedia` call, in the album_scann.go the transaction created after this call and created from the context which returned by `BeforeProcessMedia`. Another difference was that in the `ProcessSingleMedia` call the `AfterProcessMedia` call was called with the same - db transaction - context, in the album_scanner it was called outside of the transaction. I changed the logic by merging the two behavior: Create the transaction from the context of `BeforeProcessMedia` and also use the transaction context in the `AfterProcessMedia`. After the change the error disappeared. So to have it in a common place I extracted that logic into a function and use for both the single photo request and in the album scanner. I did not go more deeper to find out what's going on with the context under the hood.
41 lines
1.3 KiB
Go
41 lines
1.3 KiB
Go
package scanner
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import (
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"github.com/photoview/photoview/api/graphql/models"
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"github.com/photoview/photoview/api/scanner/media_encoding"
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"github.com/photoview/photoview/api/scanner/scanner_task"
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"github.com/photoview/photoview/api/scanner/scanner_tasks"
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"github.com/pkg/errors"
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)
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func scanMedia(ctx scanner_task.TaskContext, media *models.Media, mediaData *media_encoding.EncodeMediaData, mediaIndex int, mediaTotal int) error {
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newCtx, err := scanner_tasks.Tasks.BeforeProcessMedia(ctx, mediaData)
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if err != nil {
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return errors.Wrapf(err, "before process media (%s)", media.Path)
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}
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mediaCachePath, err := media.CachePath()
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if err != nil {
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return errors.Wrapf(err, "cache directory error (%s)", media.Path)
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}
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transactionError := newCtx.DatabaseTransaction(func(ctx scanner_task.TaskContext) error {
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updatedURLs, err := scanner_tasks.Tasks.ProcessMedia(newCtx, mediaData, mediaCachePath)
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if err != nil {
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return errors.Wrapf(err, "process media (%s)", media.Path)
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}
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if err = scanner_tasks.Tasks.AfterProcessMedia(newCtx, mediaData, updatedURLs, mediaIndex, mediaTotal); err != nil {
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return errors.Wrap(err, "after process media")
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}
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return nil
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})
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if transactionError != nil {
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return errors.Wrap(transactionError, "process media database transaction")
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}
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return nil
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}
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