This event id is recorded for a wide variety of error messages related to the Blackberry Router service. Each problem should be approached based on the actual error description and not just the event id itself.
Error: [SERVICE_RELAY_SESSION:S3586148:01386c38] Service transaction not found. SERVICESESSION_TAG=22919789
As a temporary fix, some users restart the server. One post suggest that this issue indicates that packets are being dropped after authentication has occurred. The recommended troubleshooting approach was to look for evidence of irregular network activity either at the customers end or with their ISP. The issues could be in routers, hubs or switches or even the BES servers NIC.
Error: [DEVICE_MANAGER] SRP StartListening failed. Port 4101 may be in use by another application.
This problem appears because a third-party application is using port 4101 on the BlackBerry Enterprise Server. See EV100318
(BlackBerry Support Article Number: KB-04675) for more details on this issue.