Office macros (word, excel, powerpoint) fail to display, show broken links instead

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Symptoms

The following appears in the atlassian-confluence.log:

2015-03-02 22:25:15,471 WARN [http-bio-8090-exec-6] [com.benryan.conversion.FileBackedCache] get Failed to read file C:\Confluence-Home\viewfile\attachment-v1: com.benryan.conversion.HtmlConversionData; local class incompatible: stream classdesc serialVersionUID = -3789206518463332512, local class serialVersionUID = 8821999123545860133
 -- referer: http://testinstance/pages/worddav/preview.action?fileName=TestFile.xlsx&pageId=41414141	 | url: /plugins/servlet/benryanconversion | userName: raistlin
java.io.InvalidClassException: com.benryan.conversion.HtmlConversionData; local class incompatible: stream classdesc serialVersionUID = -3789206518463332512, local class serialVersionUID = 8821999123545860133
    at java.io.ObjectStreamClass.initNonProxy(Unknown Source)
    at java.io.ObjectInputStream.readNonProxyDesc(Unknown Source)
    at java.io.ObjectInputStream.readClassDesc(Unknown Source)
    at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
    at java.io.ObjectInputStream.readObject0(Unknown Source)
    at java.io.ObjectInputStream.readObject(Unknown Source)
    at com.benryan.conversion.FileBackedCache.get(FileBackedCache.java:53)
    at com.benryan.components.AbstractConversionCacheManager.getFromCache(AbstractConversionCacheManager.java:87)
    at com.benryan.components.DefaultHtmlCacheManager.getHtmlConversionData(DefaultHtmlCacheManager.java:11)
    at com.benryan.conversion.HtmlImageServlet.getHtmlConvertionData(HtmlImageServlet.java:79)

The office macro will appear with the following broken link graphic:

Cause

This is caused by a corruption in the Office Connector plugin's (which supplies the Office Word, Office Excel and Office Powerpoint macros) cache.

Resolution

Clear out the Office Connector's cache. To do so:

  1. Shutdown Confluence
  2. Ensure the user running Confluence has full read/write privileges to the confluence-home directory.
  3. Remove the following directory:
    • <confluence-home>/viewfile
  4. Start Confluence

 

 

 

Last modified on Mar 30, 2016

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