What does "corosync: [IPC ] Invalid IPC credentials." messages mean on Red Hat Enterprise Linux 6?

Solution Unverified - Updated -


  • Getting "Invalid IPC credentials." messages from corosync in /var/log/messages on RHEL6 cluster nodes. Does this indicate any harms ?
# grep IPC messages*
corosync[3932]:   [IPC   ] Invalid IPC credentials.
corosync[3932]:   [IPC   ] Invalid IPC credentials.
  • On that machine im having the following message every one minute.
corosync[3034]:   [IPC   ] Invalid IPC credentials.


  • Red Hat Enterprise Linux Server 6 (with the High Availability Add on)
  • Red Hat High Availability Cluster with at least 2 nodes
    • corosync is used for cluster transport.
  • A non-root user is trying to execute clustat:

    • The command triggering the message may be run by system monitoring software.

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