thanks @ vanegi for your reply.. When i rechecked everything i found database was down....after restarting it worked. but i have another query that when we put my configuration inside jdbc pool it worked. What i have to import in place of com.day.commons.datasource.poolservice.DataSourcePool to use ...

I am trying to make connection in mysql database via putting property inside configMgr with jdpc pool configurations datasource is coming from org.apache.commons.dbcp.PoolingDataSource but when i trying to access connection inside is, its null and if i check few attributes , i found one interesting ...

bundle was active but still This was not happening because custom package was not in export list inside manifest. For testing i moved my classes to model or any preexisting package & they are getting resolved.  Now question came why it is not in export inside manifest.

in aem core my service package is not coming into export inside manifest & so not able to use in my jsp page in component.How to include my service package of core bundle into export when it see it inside bundle in felix console. 

I am trying to create custom submit action and calling my service from from post.POST.jsp similar to below but calling my service inplace of mail.https://docs.adobe.com/content/help/en/experience-manager-65/forms/customize-aem-forms/custom-submit-action-form.html way i am calling.  core.service.Hand...