c3p0 generating many connections

Code that gets the connection

InitialContext ctx = new InitialContext();
            DataSource ds = (DataSource) ctx.lookup("java:/comp/env/jdbc/oracledb");
            Connection connection = ds.getConnection();
            connection.setAutoCommit(false);
            return connection;

Web.xml Settings

<resource-ref>
    <res-ref-name>jdbc/oracledb</res-ref-name>
    <res-type>javax.sql.DataSource</res-type>
    <res-auth>Container</res-auth>
</resource-ref>

Jetty c3p0 configuration

<Configure id="wac" class="org.eclipse.jetty.webapp.WebAppContext">
<New id="myds" class="org.eclipse.jetty.plus.jndi.Resource">
    <Arg></Arg>
    <Arg>jdbc/oracledb</Arg>
    <Arg>

         <New class="com.mchange.v2.c3p0.ComboPooledDataSource"> 
            <Set name="driverClass">oracle.jdbc.OracleDriver</Set> 
            <Set name="jdbcUrl">jdbc:oracle:thin:@SRVODA-SCAN.CAIRUNET.AD.BR:1521/WINTP</Set> 
            <Set name="user">x</Set> 
            <Set name="password">x</Set> 
            <Set name="maxPoolSize">20</Set>
            <Set name="minPoolSize">5</Set>
            <Set name="acquireIncrement">5</Set>
            <Set name="maxIdleTime">45</Set>
            <Set name="maxIdleTimeExcessConnections">30</Set>
            <Set name="preferredTestQuery">select sysdate from dual</Set>

        </New> 

    </Arg>
</New>

Closes the connection

public static boolean closeConnection(Connection connection) {

    if(connection != null) {
        try {
            if(!connection.isClosed()) {
                connection.close();
                return true;
            }else {
                return false;
            }

        } catch (SQLException e) {
            e.printStackTrace();
            throw new IllegalArgumentException(e.getMessage());
        }
    }else {
        return false;
    }
}

Versions:

<dependency>
        <groupId>com.mchange</groupId>
        <artifactId>c3p0</artifactId>
        <version>0.9.5.2</version>
    </dependency>

    <dependency>
        <groupId>com.mchange</groupId>
        <artifactId>mchange-commons-java</artifactId>
        <version>0.2.7</version>
    </dependency>

Jetty is the 8x eclipse version

Now the problem, every time when you pick up a connection, the eclipse console log is registering a pool initialization, and this causes a slow connection to the database, a significant slowness (obs, the log is much larger than this, not to get too big, I just took a piece of the log)

INFORMAÇÕES: Initializing c3p0 pool... com.mchange.v2.c3p0.ComboPooledDataSource [ acquireIncrement -> 5, acquireRetryAttempts -> 30, acquireRetryDelay -> 1000, autoCommitOnClose -> false, automaticTestTable -> null, breakAfterAcquireFailure -> false, checkoutTimeout -> 0, connectionCustomizerClassName -> null, connectionTesterClassName -> com.mchange.v2.c3p0.impl.DefaultConnectionTester, contextClassLoaderSource -> caller, dataSourceName -> 2ukwbk9rlq3x1yrxl5ji|591f989e, debugUnreturnedConnectionStackTraces -> false, description -> null, driverClass -> oracle.jdbc.OracleDriver, extensions -> {}, factoryClassLocation -> null, forceIgnoreUnresolvedTransactions -> false, forceSynchronousCheckins -> false, forceUseNamedDriverClass -> false, identityToken -> 2ukwbk9rlq3x1yrxl5ji|591f989e, idleConnectionTestPeriod -> 0, initialPoolSize -> 3, jdbcUrl -> jdbc:oracle:thin:@SRVODA-SCAN.CAIRUNET.AD.BR:1521/WINTP, maxAdministrativeTaskTime -> 0, maxConnectionAge -> 0, maxIdleTime -> 45, maxIdleTimeExcessConnections -> 30, maxPoolSize -> 20, maxStatements -> 0, maxStatementsPerConnection -> 0, minPoolSize -> 5, numHelperThreads -> 3, preferredTestQuery -> select sysdate from dual, privilegeSpawnedThreads -> false, properties -> {user=******, password=******}, propertyCycle -> 0, statementCacheNumDeferredCloseThreads -> 0, testConnectionOnCheckin -> false, testConnectionOnCheckout -> false, unreturnedConnectionTimeout -> 0, userOverrides -> {}, usesTraditionalReflectiveProxies -> false ]
out 24, 2017 8:13:21 AM com.mchange.v2.resourcepool.BasicResourcePool 
ADVERTÊNCIA: Bad pool size config, start 3 < min 5. Using 5 as start.
out 24, 2017 8:13:22 AM com.mchange.v2.c3p0.impl.AbstractPoolBackedDataSource 
INFORMAÇÕES: Initializing c3p0 pool... com.mchange.v2.c3p0.ComboPooledDataSource [ acquireIncrement -> 5, acquireRetryAttempts -> 30, acquireRetryDelay -> 1000, autoCommitOnClose -> false, automaticTestTable -> null, breakAfterAcquireFailure -> false, checkoutTimeout -> 0, connectionCustomizerClassName -> null, connectionTesterClassName -> com.mchange.v2.c3p0.impl.DefaultConnectionTester, contextClassLoaderSource -> caller, dataSourceName -> 2ukwbk9rlq3x1yrxl5ji|591f989e, debugUnreturnedConnectionStackTraces -> false, description -> null, driverClass -> oracle.jdbc.OracleDriver, extensions -> {}, factoryClassLocation -> null, forceIgnoreUnresolvedTransactions -> false, forceSynchronousCheckins -> false, forceUseNamedDriverClass -> false, identityToken -> 2ukwbk9rlq3x1yrxl5ji|591f989e, idleConnectionTestPeriod -> 0, initialPoolSize -> 3, jdbcUrl -> jdbc:oracle:thin:@SRVODA-SCAN.CAIRUNET.AD.BR:1521/WINTP, maxAdministrativeTaskTime -> 0, maxConnectionAge -> 0, maxIdleTime -> 45, maxIdleTimeExcessConnections -> 30, maxPoolSize -> 20, maxStatements -> 0, maxStatementsPerConnection -> 0, minPoolSize -> 5, numHelperThreads -> 3, preferredTestQuery -> select sysdate from dual, privilegeSpawnedThreads -> false, properties -> {user=******, password=******}, propertyCycle -> 0, statementCacheNumDeferredCloseThreads -> 0, testConnectionOnCheckin -> false, testConnectionOnCheckout -> false, unreturnedConnectionTimeout -> 0, userOverrides -> {}, usesTraditionalReflectiveProxies -> false ]
out 24, 2017 8:13:22 AM com.mchange.v2.resourcepool.BasicResourcePool 
ADVERTÊNCIA: Bad pool size config, start 3 < min 5. Using 5 as start.
out 24, 2017 8:13:22 AM com.mchange.v2.c3p0.impl.AbstractPoolBackedDataSource 
INFORMAÇÕES: Initializing c3p0 pool... com.mchange.v2.c3p0.ComboPooledDataSource [ acquireIncrement -> 5, acquireRetryAttempts -> 30, acquireRetryDelay -> 1000, autoCommitOnClose -> false, automaticTestTable -> null, breakAfterAcquireFailure -> false, checkoutTimeout -> 0, connectionCustomizerClassName -> null, connectionTesterClassName -> com.mchange.v2.c3p0.impl.DefaultConnectionTester, contextClassLoaderSource -> caller, dataSourceName -> 2ukwbk9rlq3x1yrxl5ji|591f989e, debugUnreturnedConnectionStackTraces -> false, description -> null, driverClass -> oracle.jdbc.OracleDriver, extensions -> {}, factoryClassLocation -> null, forceIgnoreUnresolvedTransactions -> false, forceSynchronousCheckins -> false, forceUseNamedDriverClass -> false, identityToken -> 2ukwbk9rlq3x1yrxl5ji|591f989e, idleConnectionTestPeriod -> 0, initialPoolSize -> 3, jdbcUrl -> jdbc:oracle:thin:@SRVODA-SCAN.CAIRUNET.AD.BR:1521/WINTP, maxAdministrativeTaskTime -> 0, maxConnectionAge -> 0, maxIdleTime -> 45, maxIdleTimeExcessConnections -> 30, maxPoolSize -> 20, maxStatements -> 0, maxStatementsPerConnection -> 0, minPoolSize -> 5, numHelperThreads -> 3, preferredTestQuery -> select sysdate from dual, privilegeSpawnedThreads -> false, properties -> {user=******, password=******}, propertyCycle -> 0, statementCacheNumDeferredCloseThreads -> 0, testConnectionOnCheckin -> false, testConnectionOnCheckout -> false, unreturnedConnectionTimeout -> 0, userOverrides -> {}, usesTraditionalReflectiveProxies -> false ]
out 24, 2017 8:13:22 AM com.mchange.v2.resourcepool.BasicResourcePool 
ADVERTÊNCIA: Bad pool size config, start 3 < min 5. Using 5 as start.

La oracle, with a person using, and performing basic operation, has 1500 INACTIVE sessions that are not discarded

What can I be doing wrong here? Any help is welcome.