[SOLVED] Attachment links not found (404) after Slack import using advanced exporter tool

ebabinet · March 12, 2017, 6:40pm

Summary

Unable to preview or download attachments after Slack import using slack-advanced-exporter tool.

Steps to reproduce

Running Mattermost build 3.6.2 on Ubuntu 16.04

Created Slack export and used slack-advanced-exporter to add attachments - worked fine, no errors.
Imported Slack export file using Mattermost CLI - got some warnings and some errors “Unable to decode image err=image: unknown format” (full log below)
After import the attachments appear in posts, but when I click on them they don’t preview or download. The links are returning 404 errors. Here’s an example https request result: {“id”:“api.file.read_file.reading_local.app_error”,“message”:“Encountered an error reading from local server storage”,“detailed_error”:"",“request_id”:“1ciru537ubdxbqxkgqugwyhk9y”,“status_code”:404}

Any suggestions for troubleshooting?

Thanks!
-Eric

CLI Slack Import log:

ubuntu@ip-172-31-13-137:/opt/mattermost/bin$ sudo ./platform import slack enlivening-edge ~/export-with-attachments.zip
Running Slack Import. This may take a long time for large teams or teams with many messages.
[2017/03/12 06:23:58 UTC] [EROR] Error saving user. err=User.IsValid: model.user.is_valid.email.app_error, user_id=u5rtemkq4bgcukmocspjgu3fde
[2017/03/12 06:23:59 UTC] [EROR] Error saving user. err=User.IsValid: model.user.is_valid.email.app_error, user_id=sjwihu3uafg9uxtdxzqin4tkta
[2017/03/12 06:23:59 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:23:59 UTC] [WARN] Unsupported post type: message, file_mention
[2017/03/12 06:23:59 UTC] [WARN] Unsupported post type: message, file_mention
[2017/03/12 06:23:59 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:23:59 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:23:59 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:23:59 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:23:59 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:23:59 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:23:59 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:24:00 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:24:00 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:24:00 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:24:00 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:24:00 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:24:00 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:24:00 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:24:00 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:24:00 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:24:00 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:24:00 UTC] [WARN] Unsupported post type: message, file_mention
[2017/03/12 06:24:01 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:24:01 UTC] [WARN] Unsupported post type: message, channel_name
[2017/03/12 06:24:01 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:24:01 UTC] [WARN] Unsupported post type: message, channel_archive
[2017/03/12 06:24:01 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:24:01 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:24:01 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:24:01 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:24:02 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:24:02 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:24:02 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:24:02 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:24:03 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:24:03 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:24:03 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:24:03 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:24:03 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:24:21 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:24:22 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:24:22 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:24:23 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:24:23 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:24:23 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:24:23 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:24:23 UTC] [WARN] Unsupported post type: message, channel_topic
[2017/03/12 06:24:23 UTC] [WARN] Unsupported post type: message, channel_archive
[2017/03/12 06:24:23 UTC] [WARN] Unsupported post type: message, channel_archive
[2017/03/12 06:24:23 UTC] [WARN] Unsupported post type: message, channel_archive
[2017/03/12 06:24:23 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:24:23 UTC] [WARN] Unsupported post type: message, channel_archive
[2017/03/12 06:24:23 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:24:23 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:24:24 UTC] [WARN] Unsupported post type: message, channel_name
[2017/03/12 06:24:24 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:24:24 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:24:24 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:24:25 UTC] [WARN] Unsupported post type: message, channel_name
[2017/03/12 06:24:25 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:24:25 UTC] [WARN] Unsupported post type: message, channel_archive
[2017/03/12 06:24:26 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:24:26 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:24:26 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:24:26 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:24:26 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:24:26 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:24:27 UTC] [WARN] Unsupported post type: message, channel_archive
[2017/03/12 06:24:27 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:24:27 UTC] [WARN] Unsupported post type: message, channel_archive
[2017/03/12 06:24:27 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:24:27 UTC] [WARN] Unsupported post type: message, channel_archive
[2017/03/12 06:24:27 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:24:27 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:24:29 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:24:29 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:24:29 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:24:29 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:24:29 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:24:30 UTC] [WARN] Unsupported post type: message, bot_add
[2017/03/12 06:24:30 UTC] [WARN] Unsupported post type: message, channel_archive
[2017/03/12 06:24:31 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:24:31 UTC] [WARN] Unsupported post type: message, channel_archive
[2017/03/12 06:24:31 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:24:31 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:24:31 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:24:32 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:24:32 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:26:12 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:26:14 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:26:15 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:26:15 UTC] [WARN] Unsupported post type: message, channel_archive
[2017/03/12 06:26:18 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:26:19 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:26:19 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:26:19 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:26:19 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:26:20 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:26:20 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:26:31 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:26:31 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:26:31 UTC] [WARN] Unsupported post type: message, channel_archive
[2017/03/12 06:26:31 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:26:31 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:26:32 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:26:32 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:26:35 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:26:35 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:26:35 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:26:36 UTC] [WARN] Unsupported post type: message, bot_add
[2017/03/12 06:26:36 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:26:36 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:26:36 UTC] [WARN] Unsupported post type: message, channel_archive
[2017/03/12 06:26:37 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:26:37 UTC] [WARN] Unsupported post type: message, channel_archive
[2017/03/12 06:26:37 UTC] [WARN] Unsupported post type: message, channel_archive
[2017/03/12 06:26:37 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:26:38 UTC] [WARN] Unsupported post type: message, reply_broadcast
[2017/03/12 06:26:38 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:26:38 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:26:38 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:26:38 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:26:38 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:26:39 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:26:39 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:26:39 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:26:39 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:26:39 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:26:39 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:26:39 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:26:39 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:26:39 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:26:40 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:26:41 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:26:41 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:26:42 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:26:42 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:26:42 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:26:42 UTC] [WARN] Unsupported post type: message, reply_broadcast
[2017/03/12 06:26:42 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:26:43 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:26:43 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:26:43 UTC] [WARN] Unsupported post type: message, channel_archive
[2017/03/12 06:26:43 UTC] [WARN] Unsupported post type: message, channel_archive
[2017/03/12 06:26:43 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:26:46 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:26:46 UTC] [WARN] Unsupported post type: message, channel_archive
[2017/03/12 06:26:46 UTC] [WARN] Unsupported post type: message, channel_archive
[2017/03/12 06:26:46 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:26:46 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:26:46 UTC] [WARN] Unsupported post type: message, channel_archive
[2017/03/12 06:26:47 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:26:47 UTC] [WARN] Unsupported post type: message, channel_archive
[2017/03/12 06:26:47 UTC] [WARN] Unsupported post type: message, channel_archive
[2017/03/12 06:26:48 UTC] [WARN] Unsupported post type: message, channel_archive
[2017/03/12 06:26:48 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:26:48 UTC] [WARN] Unsupported post type: message, channel_archive
[2017/03/12 06:26:48 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:26:49 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:26:49 UTC] [WARN] Unsupported post type: message, channel_archive
[2017/03/12 06:26:49 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:26:49 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:26:49 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:26:49 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:26:49 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:26:49 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:26:49 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:26:49 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:26:49 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:26:49 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:26:49 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:26:49 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:26:50 UTC] [WARN] Unsupported post type: message, file_mention
[2017/03/12 06:26:51 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:26:51 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:26:51 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:26:53 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:26:53 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:26:53 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:26:53 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:26:54 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:26:54 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:26:54 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:26:54 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:26:55 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:26:55 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:26:55 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:26:55 UTC] [WARN] Unsupported post type: message, channel_archive
[2017/03/12 06:26:55 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:26:56 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:26:56 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:26:56 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:26:57 UTC] [WARN] Unsupported post type: message, reply_broadcast
[2017/03/12 06:26:58 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:26:58 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:26:58 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:26:58 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:26:58 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:26:58 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:26:59 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:26:59 UTC] [WARN] Unsupported post type: message, channel_archive
[2017/03/12 06:26:59 UTC] [WARN] Unsupported post type: message, channel_archive
[2017/03/12 06:26:59 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:26:59 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:26:59 UTC] [WARN] Unsupported post type: message, channel_archive
[2017/03/12 06:26:59 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:26:59 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:26:59 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:27:00 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:27:00 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:27:00 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:27:00 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:27:00 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:27:01 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:27:01 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:27:01 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:27:02 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:27:02 UTC] [WARN] Unsupported post type: message, channel_archive
[2017/03/12 06:27:02 UTC] [WARN] Unsupported post type: message, channel_archive
[2017/03/12 06:27:02 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:27:02 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:27:05 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:27:08 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:27:08 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:27:08 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:27:08 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:27:08 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:27:08 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:27:08 UTC] [WARN] Unsupported post type: message, channel_archive
[2017/03/12 06:27:08 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:27:08 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:27:08 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:27:09 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:27:09 UTC] [WARN] Unsupported post type: message, bot_add
[2017/03/12 06:27:09 UTC] [WARN] Unsupported post type: message, bot_remove
[2017/03/12 06:27:09 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:27:09 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:27:09 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:27:09 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:27:09 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:27:09 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:27:09 UTC] [WARN] Unsupported post type: message, channel_archive
[2017/03/12 06:27:10 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:27:10 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:27:10 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:27:10 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:27:10 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:27:10 UTC] [WARN] Unsupported post type: message, file_mention
[2017/03/12 06:27:10 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:27:10 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:27:10 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:27:10 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:27:10 UTC] [WARN] Unsupported post type: message, channel_name
[2017/03/12 06:27:10 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:27:10 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:27:11 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:27:13 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:27:13 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:27:13 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:27:13 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:27:13 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:27:13 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:27:13 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:27:14 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:27:14 UTC] [WARN] Unsupported post type: message, channel_archive
[2017/03/12 06:27:14 UTC] [WARN] Unsupported post type: message, channel_archive
[2017/03/12 06:27:14 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:27:14 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:27:14 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:27:14 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:27:14 UTC] [WARN] Unsupported post type: message, channel_name
[2017/03/12 06:27:14 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:27:14 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:27:14 UTC] [WARN] Unsupported post type: message, file_mention
[2017/03/12 06:27:14 UTC] [WARN] Unsupported post type: message, channel_topic
[2017/03/12 06:27:14 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:27:14 UTC] [WARN] Unsupported post type: message, channel_archive
[2017/03/12 06:27:14 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:27:14 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:27:14 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:27:15 UTC] [WARN] Unsupported post type: message, channel_archive
[2017/03/12 06:27:15 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:27:15 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:27:15 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:27:15 UTC] [WARN] Unsupported post type: message, channel_archive
[2017/03/12 06:27:15 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:27:16 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:27:16 UTC] [EROR] Unable to upload thumbnail path= err=WriteFile: api.file.write_file_locally.writing.app_error, open /opt/mattermost/data/: is a directory
[2017/03/12 06:27:16 UTC] [EROR] Unable to upload preview path= err=WriteFile: api.file.write_file_locally.writing.app_error, open /opt/mattermost/data/: is a directory
[2017/03/12 06:27:16 UTC] [WARN] Unsupported post type: message, slackbot_response
[2017/03/12 06:27:16 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:27:16 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:27:17 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:27:17 UTC] [WARN] Unsupported post type: message, bot_disable
[2017/03/12 06:27:17 UTC] [WARN] Unsupported post type: message, bot_disable
[2017/03/12 06:27:17 UTC] [WARN] Unsupported post type: message, reply_broadcast
[2017/03/12 06:27:18 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:27:18 UTC] [WARN] Unsupported post type: message, pinned_item
[2017/03/12 06:27:18 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:27:18 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:27:19 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:27:19 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:27:22 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:27:22 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:27:22 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:27:25 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:27:25 UTC] [EROR] Unable to decode image err=image: unknown format
[2017/03/12 06:27:25 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:27:25 UTC] [WARN] Unsupported post type: message, channel_archive
[2017/03/12 06:27:26 UTC] [WARN] Unsupported post type: message, channel_archive
[2017/03/12 06:27:26 UTC] [WARN] Unsupported post type: message, channel_purpose
[2017/03/12 06:27:26 UTC] [WARN] Unsupported post type: message, channel_purpose
Finished Slack Import.

ebabinet · March 12, 2017, 6:43pm

I should mention that the 404 errors are happening not just on image files (which might be explained by the errors in the import file), but also on other file types such as Word files.

ebabinet · March 12, 2017, 9:44pm

Found the problem: the /opt/mattermost/data/team/ directory and all contents had owner:group set to root:root instead of mattermost:mattermost.

lindy65 · March 16, 2017, 9:30am

Thanks @ebabinet! Glad your issue is resolved

meszi · December 18, 2017, 1:23pm

Hi, I am somewhat new to the topic. Can you point me to a source explaining how to use the advanced exporter tool? I need to import a Slack team to a self-hosted MM server. :-/ Kind regards, /me.

lindy65 · December 19, 2017, 10:18am

Hi @meszi,

Thanks for your question,

You can read about Slack import here.

Topic		Replies	Views
[SOLVED] CLI Slack Import fails with images but not with other files Troubleshooting	2	1187	August 24, 2017
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No attachments in mattermost after import of Slack Advanced Exporter file via CLI or mmetl Command Line Interface	19	2670	August 20, 2021
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Slack advanced exporter and attachments Troubleshooting	6	2281	November 19, 2018

[SOLVED] Attachment links not found (404) after Slack import using advanced exporter tool

Summary

Steps to reproduce

Related topics