Thumbnails do not generate in Confluence
プラットフォームについて: Server および Data Center のみ。この記事は、Server および Data Center プラットフォームのアトラシアン製品にのみ適用されます。
Support for Server* products ended on February 15th 2024. If you are running a Server product, you can visit the Atlassian Server end of support announcement to review your migration options.
*Fisheye および Crucible は除く
問題
When editing a Confluence page to add an image to it, thumbnails don't generate for certain image attachments (PNG, GIF).
- Edit a Confluence page that has attachments
- Click + > Files and images
- In the Insert files and images dialog, you see spinners instead of thumbnails:
This issue may also manifest in Jira, in which the thumbnails on an issue do not render. See Thumbnails do not generate in Jira running in Azure.
atlassian-confluence.log に次の内容が記録される場合があります。
2018-09-13 17:30:41,495 INFO [http-nio-127.0.0.1-8090-exec-32] [pages.thumbnail.renderer.DelegatingThumbnailRenderer] retrieveIfExists More info:
-- referer: http://confluence-base-url/display/OS/Test+Page | url: /download/thumbnails/9193763/image2017-8-29_16-40-12.png | traceId: 2fa2966db05d3258 | userName: user
com.atlassian.confluence.pages.thumbnail.ThumbnailRenderException: java.io.IOException: There is not ImageReader available for the given ImageInputStream
at com.atlassian.confluence.pages.thumbnail.renderer.ThumbnailRenderer.withStreamConsumer(ThumbnailRenderer.java:192)
at com.atlassian.confluence.pages.thumbnail.renderer.ThumbnailRenderer.imageDimensions(ThumbnailRenderer.java:178)
at com.atlassian.confluence.pages.thumbnail.renderer.ThumbnailRenderer.imageDimensions(ThumbnailRenderer.java:171)
at com.atlassian.confluence.pages.thumbnail.renderer.DelegatingThumbnailRenderer.retrieveIfExists(DelegatingThumbnailRenderer.java:83)
at com.atlassian.confluence.pages.thumbnail.renderer.DelegatingThumbnailRenderer.retrieveOrCreateThumbNail(DelegatingThumbnailRenderer.java:118)
at com.atlassian.confluence.pages.thumbnail.DefaultThumbnailManager.lambda$getThumbnail$0(DefaultThumbnailManager.java:161)
at com.atlassian.confluence.impl.util.collections.ConcurrentOperationMap.lambda$computeIfAbsent$0(ConcurrentOperationMap.java:28)
at java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1660)
at com.atlassian.confluence.impl.util.collections.ConcurrentOperationMap.computeIfAbsent(ConcurrentOperationMap.java:28)
at com.atlassian.confluence.pages.thumbnail.DefaultThumbnailManager.getThumbnail(DefaultThumbnailManager.java:160)
at com.atlassian.confluence.importexport.resource.ThumbnailDownloadResourceManager.getResourceReader(ThumbnailDownloadResourceManager.java:61)
at com.atlassian.confluence.importexport.resource.DelegatorDownloadResourceManager.getResourceReader(DelegatorDownloadResourceManager.java:33)
at com.atlassian.confluence.servlet.download.AttachmentDownload.getStreamForDownload(AttachmentDownload.java:84)
at com.atlassian.confluence.servlet.download.ServeAfterTransactionDownload$StreamResultCallback.doInTransaction(ServeAfterTransactionDownload.java:110)
at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:133)
at com.atlassian.confluence.servlet.download.ServeAfterTransactionDownload.getStreamInTransaction(ServeAfterTransactionDownload.java:36)
at com.atlassian.confluence.servlet.download.ServeAfterTransactionDownload.serveFile(ServeAfterTransactionDownload.java:42)
at com.atlassian.plugin.servlet.AbstractFileServerServlet.doGet(AbstractFileServerServlet.java:28)
...
at java.lang.Thread.run(Thread.java:748)
Caused by: java.io.IOException: There is not ImageReader available for the given ImageInputStream
at com.atlassian.confluence.content.render.image.ImageRenderUtils.dimensionsForImage(ImageRenderUtils.java:30)
at com.atlassian.confluence.content.render.image.ImageRenderUtils.dimensionsForImage(ImageRenderUtils.java:46)
at com.atlassian.confluence.pages.thumbnail.renderer.ThumbnailRenderer.lambda$imageDimensions$0(ThumbnailRenderer.java:178)
at com.atlassian.confluence.pages.thumbnail.renderer.ThumbnailRenderer.withStreamConsumer(ThumbnailRenderer.java:190)
... 312 more診断
環境
- Instance is hosted in Microsoft Azure (Linux VM, file share)
- Confluence home directory (or shared-home, for Data Center instances) is an Azure file share, mounted to a folder in the VM
Mount options are set with the default user ID and group ID options:
uid=0, noforceuid, gid=0, noforcegid
Diagnostic Steps
- The actual attachments can be viewed and accessed as expected
- The thumbnails folder in the home directory may contain thumbnail files with 0-length
- Files and folders in the home/shared-home directory are owned by root/root
- Check the mount options with sudo mount | grep cifs
原因
Using the default mount options to lock the gid and uid, thereby resulting in root/root owning all of the files and folders in the mount directory, somehow prevents the thumbnails from being generated.
ソリューション
There are two ways to resolve this:
ソリューション 1
Re-configure the mount options to set the uid and gid specifically to the user (and the user's group) that runs the application. For example, if you have a dedicated user called confluence and it's in a group called confluence, you will set uid=confluence and gid=confluence in your mount options.
ソリューション 2
Add "noperm" to the mount options. An /etc/fstab entry with noperm would look something like this:
//testesourceroupdiag.file.core.windows.net/testazurefs /home/testazure/atlassian/shared-home cifs noperm,nofail,vers=3.0,credentials=/etc/smbcredentials/testesourceroupdiag.cred,file_mode=0777,dir_mode=0777,serverino