Shibboleth SP session storage issue

[Cathy Scott]

Hello all,

Hoping to get assistance with a session state issue.  Users are
successfully authenticating but the session is almost immediately removed.
Shib SP v3.0.4.1, upgraded from v2. Here are selected log examples. Any
assistance would be greatly appreciated, thanks.

native_warn.log
2020-04-13 07:31:36 ERROR Shibboleth.Apache [2372] shib_check_user: Unable
to obtain session to export to request.
2020-04-13 07:33:14 ERROR Shibboleth.Listener [2372] shib_check_user
[default]: remoted message returned an error: Your session is not available
in the session store, and you must re-authenticate.
2020-04-13 07:42:59 ERROR Shibboleth.Apache [2372] shib_handler: Failure
sending remoted message (default/SAML2/POST).
2020-04-13 07:43:31 ERROR Shibboleth.Apache [2372] shib_check_user: Failure
sending remoted message (set::RelayState).

shibd.log
2020-04-13 07:29:52 INFO Shibboleth.SessionCache [2] [default]: new session
created: ID (_d7acbb8046b19034e92a0f7aade41ecd) IdP (
https://clienturl/idp/shibboleth)
Protocol(urn:oasis:names:tc:SAML:2.0:protocol) Address (xxx.xxx.71.6)
2020-04-13 07:29:53 INFO Shibboleth.SessionCache [2] [default]: removed
session (_d7acbb8046b19034e92a0f7aade41ecd)
2020-04-13 07:31:24 INFO Shibboleth.SessionCache [4] [default]: new session
created: ID (_f140df61cc28d15ba00aac901ad6e131) IdP (
https://clienturl/idp/shibboleth)
Protocol(urn:oasis:names:tc:SAML:2.0:protocol) Address (xxx.xxx.71.6)
2020-04-13 07:31:27 INFO Shibboleth.SessionCache [4] [default]: removed
session (_f140df61cc28d15ba00aac901ad6e131)
2020-04-13 08:13:43 INFO Shibboleth.SessionCache [1] [default]: new session
created: ID (_e8208c8a842b990b94c1a5be050eed7e) IdP (
https://clienturl/idp/shibboleth)
Protocol(urn:oasis:names:tc:SAML:2.0:protocol) Address (xxx.xxx.71.28)
2020-04-13 08:13:44 INFO Shibboleth.SessionCache [4] [default]: removed
session (_e8208c8a842b990b94c1a5be050eed7e)
2020-04-13 08:13:44 INFO Shibboleth.SessionCache [4] [default]: session
(ID: _e8208c8a842b990b94c1a5be050eed7e) no longer in storage
2020-04-13 08:13:44 INFO Shibboleth.SessionCache [4] [default]: removed
session (_e8208c8a842b990b94c1a5be050eed7e
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