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"Connection failed" and "Error opening socket to server...Connection refused" when trying to connect to DB2 database using "Controller Configuration" due to DB2 server misconfiguration

Troubleshooting


Problem

Administrator launches "Controller Configuration" and opens section "Database Connections". Administrator highlights relevant connection (e.g. "Default") and clicks 'test' icon (green tick button). User receives error #1. Afterwards, administrator clicks green 'play' button, then clicks 'Connect'. User receives error #2.

Symptom

Error#1
IBM Cognos Controller Configuration
Connection failed.
[OK]

Error#2


** ERROR: com.ibm.db2.jcc.am.DisconnectNonTransientConnectionException: [jcc][t4][2043][11550][3.59.81] Exception java.net.ConnectException: Error opening socket to server NCONTDB2/9.71.36.216 on port 50,000 with message: Connection refused: connect. ERRORCODE=-4499, SQLSTATE=08001
[{"Product":{"code":"SS9S6B","label":"IBM Cognos Controller"},"Business Unit":{"code":"BU048","label":"IBM Software"},"Component":"Controller","Platform":[{"code":"PF033","label":"Windows"}],"Version":"8.5.1;10.1","Edition":"","Line of Business":{"code":"LOB76","label":"Data Platform"}},{"Product":{"code":"SSMRTZ","label":"IBM Cognos Controller on Cloud"},"Business Unit":{"code":"BU048","label":"IBM Software"},"Component":" ","Platform":[{"code":"","label":""}],"Version":"","Edition":"","Line of Business":{"code":"LOB76","label":"Data Platform"}}]

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Document Information

More support for:
IBM Cognos Controller

Software version:
8.5.1, 10.1

Operating system(s):
Windows

Document number:
197597

Modified date:
08 May 2025

UID

swg21578246

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