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https://github.com/ceph/ceph
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Thanks to John Spray <jspray@redhat.com> on ceph-devel for this information. Signed-off-by: Ken Dreyer <kdreyer@redhat.com>
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39 lines
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=================
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Troubleshooting
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=================
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Debugging ceph-fuse
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===================
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To get more debugging information from ceph-fuse, try running in the foreground
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with logging to the console (``-d``) and enabling client debug
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(``--debug-client=20``), enabling prints for each message sent
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(``--debug-ms=1``).
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If you suspect a potential monitor issue, enable monitor debugging as well
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(``--debug-monc=20``).
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Mount 5 Error
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=============
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A mount 5 error typically occurs if a MDS server is laggy or if it crashed.
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Ensure at least one MDS is up and running, and the cluster is ``active +
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healthy``.
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Mount 12 Error
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==============
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A mount 12 error with ``cannot allocate memory`` usually occurs if you have a
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version mismatch between the :term:`Ceph Client` version and the :term:`Ceph
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Storage Cluster` version. Check the versions using::
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ceph -v
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If the Ceph Client is behind the Ceph cluster, try to upgrade it::
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sudo apt-get update && sudo apt-get install ceph-common
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You may need to uninstall, autoclean and autoremove ``ceph-common``
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and then reinstall it so that you have the latest version. |