Thus, the error translates to: The query execution engine, using JDBC, failed to open a network socket or handshake with the target database server.
To resolve , follow this systematic checklist:
The error almost always points to a network or server availability issue rather than a software corruption. Thus, the error translates to: The query execution
: In some specific environments (like OpenPages), certain locales can trigger this connection error.
Look for messages like "Connection attempt failed" or "SSL handshake failed" . Look for messages like "Connection attempt failed" or
Search for the string XQE-JDB-0001 to find the exact underlying exception, such as java.net.ConnectException: Connection refused or com.ibm.db2.jcc.am.DisconnectException . Step 3: Validate Driver Environment Configuration
The error is a generic IBM Cognos Analytics message indicating that the Dynamic Query Mode (DQM) engine cannot reach your underlying data source. Common Causes & Fixes Common Causes & Fixes Ensure the IP, port,
Ensure the IP, port, and database name are spelled correctly.
[Cognos DQM Engine] ---- (Port 1433: Clear Text) ----> [Hardened DB Server] ❌ (Connection Dropped)