Hi Freeradius-Users, we recently updated from 2.1.1 to 3.0.25 (we use still 3.0.25 because it is build in our SLES distribution). Freeradius uses LDAP to check users. If many users login at a time we see some error messages. To track this down we installed an internal test system that can send a lot of requests to the radius server (with radtest). We do see some problems, but the messages (and the behavior) are not the same. If we fire 60 requests in a short time from the test system to the servers, the server loggs: Thu Nov 3 13:35:11 2022 : Error: (159) Ignoring duplicate packet from client test port 46673 - ID: 65 due to unfinished request in component <core> module <queue> This seems not very bad: every user is still accepted via LDAP But in real the message is different: Thu Nov 3 00:59:25 2022 : Error: Received conflicting packet from client nas port 40634 - ID: 90 due to unfinished request in module ldap. Giving up on old request. Thu Nov 3 00:59:25 2022 : WARNING: (338542) WARNING: Module rlm_ldap became unblocked Thu Nov 3 00:59:25 2022 : Auth: (338542) Invalid user: [user024] (from client nas port 0) We think, we have a timing issue with our LDAP. But why is the log message so different? Best regards Norbert --