I am trying use HikariCP JNDI DataSource Factory within Tomcat 8.5 but when it shutdown I'm getting these warning:

```
o.a.c.loader.WebappClassLoaderBase       : The web application [ROOT] appears to have started a thread named [HikariPool-1 housekeeper] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread:
 sun.misc.Unsafe.park(Native Method)
 java.util.concurrent.locks.LockSupport.parkNanos(Unknown Source)
 java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(Unknown Source)
 java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(Unknown Source)
 java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(Unknown Source)
 java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source)
 java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
 java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
 java.lang.Thread.run(Unknown Source)

```

My Hiraki configuration was setup following the JNDI DataSource Factory (Tomcat, etc.) [document](https://github.com/brettwooldridge/HikariCP/wiki/JNDI-DataSource-Factory-(Tomcat,-etc.)), and is something like this:

```
<Resource name="******" auth="Container"
      factory="com.zaxxer.hikari.HikariJNDIFactory"
      type="javax.sql.DataSource"
      minimumIdle="5" 
      maximumPoolSize="10"
      connectionTimeout="300000"
      driverClassName="org.postgresql.Driver"
      jdbcUrl="jdbc:postgresql://******"
      dataSource.implicitCachingEnabled="true" 
      dataSource.user="******"
      dataSource.password="******" />

```

I've found this [link](https://github.com/brettwooldridge/HikariCP/issues/642) but it doesn't help because I'm using Hiraki as a resource inside Tomcat.

I'm using Tomcat 8.5
HikariCP 2.5.1

Any help? Thanks.