The last two weeks on one of the application server of SAP ECC production system, we faced the following error
Runtime Errors DBIF_RSQL_SQL_ERROR
Database error text........: " TCP Provider: The semaphore timeout period
has expired.# Communication link failure"
Internal call code.........: "[RSQL/FTCH/BSEG ]"
Please check the entries in the system log (Transaction SM21).
We tried to resolve it by restarting the SAP ECC but without luck.