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Why is a process hanging in a futex_wait?

Solution Unverified - Updated 2017-12-21T07:01:05+00:00 -

Issue

A process is hanging and we have found that it is in a futex_wait. What is happening?
What does it mean when a process endlessly waits on FUTEX_WAIT_PRIVATE?

Environment

Red Hat Enterprise Linux (all)

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