Discovery fails to run due to missing patternIssue Running discovery using the Netscaler Load Balancer pattern fails with following error: SEVERE *** ERROR *** (32)HorizontalDiscoveryProbe - Discovery using patterns could not be executed due to missing pattern Netscaler Load Balancer. Synchronize the pattern with the Mid Servers and try again In this case, the Pattern sync to MID Server is completed and the MID servers are restarted, but the error still appears and the discovery fails. The MID Server agent logs show the following errors: 1/24/21 12:48:43 (504) FileSync:sa_pattern Starting file synchronization: sa_pattern11/24/21 12:48:44 (286) FileSync:sa_pattern WARNING *** WARNING *** Could not get file sync snapshot because: Error: user not authorized to read synchronization target table: sa_pattern.11/24/21 12:48:44 (286) FileSync:sa_pattern Finishing file synchronization: sa_pattern.11/24/21 12:48:44 (286) FileSync:sa_pattern Setting countdown to 300 seconds in com.service_now.mid.filesync.NdlFileSyncer.11/24/21 12:48:51 (909) FileSync:sa_pattern DEBUG: https://<your-instance>.service-now.com/api/now/pattern_library/GetPatternFields took 762311/24/21 12:48:52 (472) FileSync:sa_pattern DEBUG: https://<your-instance>.service-now.com/api/now/pattern_library/GetAllTrackedFileDefinitions took 547 11/24/21 12:48:52 (472) Worker-Interactive:HorizontalDiscoveryProbe-5bb936098708c95080d8f3aacebb3598 SEVERE *** ERROR *** (32)HorizontalDiscoveryProbe - Discovery using patterns could not be executed due to missing pattern Netscaler Load Balancer. Synchronize the pattern with the Mid Servers and try againReleaseRome patch 1CauseA custom access control list (ACL) blocked the MID Server user access to the sa_pattern table. ResolutionThe error message reveals that the MID user is unable to access the sa_pattern table, and consequently the pattern fails to synchronize. To resolve this: 1. Go to the sa_pattern table, and then to the ACL for the Read access to the sa_pattern. 2. Add the MID server role. The following image illustrates this. 3. Run the pattern sync to the MID server. 4. Run the discovery.