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KB-1311 Tempo entry with attachment of size greater than 2 GB causes News not to render properly

Symptoms

Tempo is unable to render News properly. Navigating to News displays a page like the following:

The following error is thrown in the application server log at the same time:

2016-04-13 16:13:13,702 [http-/0.0.0.0:8080-3] ERROR com.appiancorp.abdera.AtomEntryCollectionAdapter - An internal error occured while accessing the tempo feed
java.lang.IllegalArgumentException: kiloBytes = -1552522.98 < 0
   at com.appiancorp.content.util.SizeConversionUtils.formatKiloBytes(SizeConversionUtils.java:73)
   at com.appiancorp.content.util.SizeConversionUtils.formatKiloBytes(SizeConversionUtils.java:99)
   at com.appiancorp.content.util.ServerSizeConversionUtils.formatSizeKB(ServerSizeConversionUtils.java:29)

Cause

This issue is caused by an attachment on a News post greater than 2 GB in size. This has been resolved in the following hotfixes/versions:

  • Appian 7.8 (latest hotfix)
  • Appian 7.9 (latest hotfix)
  • Appian 7.10 (latest hotfix)
  • Appian 7.11 (latest hotfix)
  • Appian 16.1 (latest hotfix)
  • Appian 16.2 (latest hotfix)
  • Appian 16.3 (latest hotfix)
  • Appian 17.1

Action

Apply the latest hotfix to your Appian installation or upgrade your version of Appian.