Flag to log stack traces for application code which abandoned a Statement or Connection. Logging of abandoned Statements and Connections adds overhead for every Connection open or new Statement because a stack trace has to be generated. 設定の確認 設定が有効な状態で Apache Tomcat を起動すると、起動時に下記の様なメッセージがコンソールに出力される。 AbandonedObjectPool is used (org.apache.tomcat.dbcp.dbcp.AbandonedObjectPool@5f8bae) LogAbandoned: