@Override
  void destroyPooledConnection(Object connectionObject) {
    try {
      ((ManagedConnection) connectionObject)
          .removeConnectionEventListener((ConnectionEventListener) connEventListner);
      ((ManagedConnection) connectionObject).destroy();
      connectionObject = null;
    } catch (ResourceException rex) {
      if (logger.isTraceEnabled()) {
        logger.trace(
            "ManagedPoolcacheImpl::destroyPooledConnection:Exception in closing the connection.Ignoring it. The exeption is {}",
            rex.getMessage(), rex);
      }
    }
  }
Destroys the underline physical connection to EIS.

@param connectionObject connection Object.
geode-core/src/main/java/org/apache/geode/internal/datasource/ManagedPoolCacheImpl.java