Disabling Questions plugin breaks drafts page

Summary

• Exception when opening drafts page after uninstalling Questions plugin

Environment

• Collaborative editing is ON
• Disabling question plugin
• Questions plugin version 2.5.5 , 2.6.6

Steps to Reproduce

1. Install Confluence questions plugin
2. Create a test question
3. Disable confluence questions plugin
4. Navigate to profile>drafts page

Expected Results

Actual Results

The below exception is thrown in the UI as attachment and below the confluence.log file:

org.apache.velocity.exception.MethodInvocationException: Invocation of method 'getBodyAsString' in class com.atlassian.confluence.content.CustomContentEntityObject threw exception java.lang.UnsupportedOperationException: The body of this ContentEntityObject \(''\) was 'BodyType:XHTML' but was expected to be 'BodyType:RAW' at /users/viewmydrafts.vm[line 47, column 29]\\     at org.apache.velocity.runtime.parser.node.ASTIdentifier.execute(ASTIdentifier.java:223\)\\ \\ caused by: java.lang.UnsupportedOperationException: The body of this ContentEntityObject \(''\) was 'BodyType:XHTML' but was expected to be 'BodyType:RAW'\\ at com.atlassian.confluence.core.ContentEntityObject.getBodyContent(ContentEntityObject.java:290\)

Workaround options

1. First option: Disabling collaborative editing, user should be able to navigate to drafts page normally.
2. Second option: Re-enabling question plugin then clear drafts.

Workaround via Database

1. Shutdown Confluence.
2. Backup database.
3. Identify all the drafts created by Questions plugin.

   select * from content c where pluginkey='com.atlassian.confluence.plugins.confluence-questions:answer-draft'
   

4. Change the status of all these drafts to deleted.

   update content set content_status = 'deleted' where contentid in (select c.contentid from content c where pluginkey='com.atlassian.confluence.plugins.confluence-questions:answer-draft');
   

5. Restart Confluence.