java - Tomcat jdbc connection pool, does not release connections after using -


what may reason tomcat not release connections after using?

herem config

<resource name="jdbc/datasource" auth="container" type="javax.sql.datasource" username="))" password="))" driverclassname="oracle.jdbc.driver.oracledriver" url="))" factory="org.apache.tomcat.jdbc.pool.datasourcefactory" initialsize="55" maxactive="55" maxidle="55" maxwait="15000"  testwhileidle="true" testonborrow="true" testonreturn="false" validationquery="select 1 dual" validationinterval="20000"  timebetweenevictionrunsmillis="30000" removeabandoned="true" removeabandonedtimeout="60" />

the probable don't close connections after using them. can happens example if don't manage correctly exceptions.


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