Background
Confluence sometimes raises an error message for particular words used as a metadata key. In a number of cases, this may be due to the use (or near use) of Confluence reserved characters or reserved words.
In some cases, this may also be due to a combination of metadata key and a metadata value used in the content.
For example the following message in the logs
java.lang.NumberFormatException: For input string: "<date>
Explanation
The Confluence search appears to be confused by the use of a named metadata key (for example if key is named Modified) when it is paired with the metadata value <date> that has been added to content.
Solution
If you use this key metadata key in a custom template it is acceptable to rename the key and update your template
- renaming the key does not immediately fix the Confluence search error but reindexing Confluence in most cases will fix the issue
- Ii reindexing does not work then deleting the original page and creating a new page will be required
