Can I change the default non-blocking IO to blocking IO in EAP 7/Undertow?

Solution Unverified - Updated -

Issue

  • I heard non-blocking IO is the default of EAP 7 web subsystem which is Undertow. Can I change it to blocking IO?
  • What does blocking and non-blocking mean actually?
  • Is a servlet executed in blocking IO? How about in AsyncContext?

Environment

  • Red Hat JBoss Enterprise Application Platform (EAP)
    • 7.0.0

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