Have you ever seen this pattern before?

[Dan McLaughlin]

We see this pattern in our logs quite often. Within the same second we
see following...

2019-08-28 09:01:47 INFO Shibboleth.SessionCache [52] [default]:
removed session (_d4a97872909de981f033505fbd3d59fe)
2019-08-28 09:01:47 INFO Shibboleth.SessionCache [44] [default]:
session recovered: ID (_d4a97872909de981f033505fbd3d59fe) IdP
(https://idp.domain.com/idp/shibboleth)
Protocol(urn:oasis:names:tc:SAML:2.0:protocol)
2019-08-28 09:01:47 INFO Shibboleth.SessionCache [44] [default]:
removed session (_d4a97872909de981f033505fbd3d59fe)
2019-08-28 09:01:47 WARN Shibboleth.SessionCache [44] [default]:
duplicate insertion of revocation for session
(_d4a97872909de981f033505fbd3d59fe)
2019-08-28 09:01:47 WARN Shibboleth.SessionCache [44] [default]:
blocked recovery of revoked session
(_d4a97872909de981f033505fbd3d59fe)
2019-08-28 09:01:47 WARN Shibboleth.SessionCache [46] [default]:
blocked recovery of revoked session
(_d4a97872909de981f033505fbd3d59fe)
2019-08-28 09:01:47 WARN Shibboleth.SessionCache [46] [default]:
blocked recovery of revoked session
(_d4a97872909de981f033505fbd3d59fe)
2019-08-28 09:01:47 WARN Shibboleth.SessionCache [46] [default]:
blocked recovery of revoked session
(_d4a97872909de981f033505fbd3d59fe)
2019-08-28 09:01:47 WARN Shibboleth.SessionCache [52] [default]:
blocked recovery of revoked session
(_d4a97872909de981f033505fbd3d59fe)
2019-08-28 09:01:47 WARN Shibboleth.SessionCache [44] [default]:
blocked recovery of revoked session
(_d4a97872909de981f033505fbd3d59fe)

Is this expected behavior?  If not, what might cause this?

--

Regards,

Dan