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KB-XXXX: Database connections issue in 17.4 and 18.1



The number of secondary data source connections, configured in the admin console, pointing to an Oracle database would climb up by a factor of five. This will cause a high number of inactive connections to the database indicating a high load from the application. 


There was a data source connection leak in the code that logs data source metrics for data sources defined through admin console.


Apply the latest hotfix to your Appian installation or upgrade to the latest version of Appian. 


  1. Make sure the user has read/write/execute access on the server.
  2. Open the file located in <APPIAN_HOME>/ear/suite.ear/resources/
  3. Set the value of from INFO to FATAL. It should look like this:, DATA_SOURCES_METRICS
  4. Restart application server to clear out the inactive sessions

Affected Versions

This article applies to Appian 17.4 and later.