症状

Despite no visible error in Confluence, removing an attachment results in the following error in atlassian-confluence.log:

2009-07-09 15:48:07,932 ERROR [TP-Processor34] [pages.persistence.dao.FileSystemAttachmentDataDao] removeDataForAttachment Error removing the attachments folder 
for the page with id: 9177303 folder: /local/mnt/confluence/attachments/9177303/10355140 Not writable

Filesystem permissions are configured correctly.

原因

The attachments folder in <confluence-home-directory> is a symbolic link (symlink).

ソリューション

Remove the symbolic link and move back the real attachments directory to <confluence-home-directory>/attachments. See Confluence Home and other important directories.