You are currently reviewing an older revision of this page.

DRAFT SP-4611 Database calls fail with "Connection has already been closed" for on-premise environments


After an upgrade or after new database calls are configured for an on-premise installation, calls to the database from the application server fail and the following error is seen in the application server log:

ERROR org.hibernate.transaction.JDBCTransaction - Could not toggle autocommit
java.sql.SQLException: Connection has already been closed.


The database connection has been abandoned since the query ran more than the time configured for removeAbandonedTimeout. The default value is 60s.


Increase the value of  removeAbandonedTimeOut in tomcat-resources.xml so that it is set to the longest running query your application may have.

Affected Versions

This article applies to Appian 19.1 and later.

Last Reviewed: August 2020