What does 'file descriptor exceeds limit' message in bind log file mean?

Solution Unverified - Updated -

Issue

  • What does 'file descriptor exceeds limit' message in bind log file mean?
  • The following message is in named log.
<TIME_STAMP> general: error: accept: file descriptor exceeds limit (4096/4096)
  • What does this message mean?

Environment

  • Red Hat Enterprise Linux (RHEL) 5.x
  • bind-9.3.6-*

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