SSSD becomes unresponsive while continuing to run useradd continuously in batches.

Solution Verified - Updated -

Issue

  • SSSD becomes unresponsive while continuing to run useradd continuously in batches.

    For example:

    # for i in `seq 1 4500` ; do useradd -s /sbin/nologin testuser$i ; done

  • The following error was frequently seen.

    The memcache was not invalidated by NSS responder.

Environment

  • Red Hat Enterprise Linux 8
  • sssd
  • useradd

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