Hello Devs,
I am using XWiki 4.0 with filesystem attachment storage and face the following
problem:
1. Add a new page, make several edits and save. In the history section of the
page navigate to any previous version - no problem.
2. Now insert an attachment (e.g. an image) to the page, save. Do some more
edits to the page, save. In the history section navigate to previous versions
of the page. It will work with versions previous to the attachment upload.
Navigating to any version that was saved after the attachment upload will cause
the following problem:
Error number 4001 in 4: Error while parsing velocity page
/templates/contentview.vm Wrapped Exception: Failed to evaluate content with id
[/templates/contentview.vm]
and
...
Caused by: java.lang.NullPointerException
at
org.xwiki.store.legacy.store.internal.FilesystemAttachmentRecycleBinStore.getAllDeletedAttachments(FilesystemAttachmentRecycleBinStore.java:293)
at
com.xpn.xwiki.web.XWikiServletURLFactory.findDeletedAttachmentForDocRevision(XWikiServletURLFactory.java:573)
at
com.xpn.xwiki.web.XWikiServletURLFactory.createAttachmentURL(XWikiServletURLFactory.java:390)
at
com.xpn.xwiki.doc.DefaultDocumentAccessBridge.getAttachmentURL(DefaultDocumentAccessBridge.java:606)
...
3. Now, instead of viewing an older version of that page, rollback to any
version previous to attachment upload.
4. Only after this rollback all previous versions are visible and do not cause
an error any more.
It seams that XWiki is missing a folder of deleted attachments and fails to
render versions following an attachment upload, therefore. When I perform the
rollback a "deleted_attachments" folder is generated in the filesystem and the
error dissappears.
To have all page versions available you have to perform a rollback and -forward
after every new attachment upload. This is not very elegant - are there any
other solutions or am I missing out something? Besides of this filesystem is a
fine thing since I have some very large attachments. However, version control
is important for me. Is there a solution or should I switch to Database Storage
again?
Thanks for any advise,
Helge
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