Large heap overhead in com.sun.faces.application.view.WriteBehindStateWriters

Solution Unverified - Updated

Environment

  • JBoss Enterprise Application Platform (EAP)
  • JSF

Issue

  • We see an OOME with our JSF application. The heap dump shows a large amount of overhead in com.sun.faces.application.view.WriteBehindStateWriters.

Resolution

  • Decrease javax.faces.FACELETS_BUFFER_SIZE, decrease request traffic, or increase heap to account for the overhead of these buffers for your request load.

Root Cause

  • These are buffers sized by the javax.faces.FACELETS_BUFFER_SIZE parameter. You can expect one buffer allocated for each JSF request so this overhead scales with concurrent request load.
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