https://devcenter.heroku.com/articles/heroku-postgresql#external-connections-ingress

1. Error occurred in establishing the connection to your local database.
   2017/10/12 10:13:51 CEST:
   If you require assistance to resolve the problem, please send a mail to 'support@zohoreports.com' by attaching the files 'conf/database_connection_params.conf', and the logs folder as zip.
   
   2017/10/12 10:13:51 CEST:
   org.postgresql.util.PSQLException: FATAL: no pg_hba.conf entry for host "xx.xx.xx.xx", user "xxxxxxxxxxxxx", database "xxxxxxxxxxxxx", SSL off
     at org.postgresql.core.v3.ConnectionFactoryImpl.doAuthentication(ConnectionFactoryImpl.java:275)
     at org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:94)
     at org.postgresql.core.ConnectionFactory.openConnection(ConnectionFactory.java:66)
     at org.postgresql.jdbc2.AbstractJdbc2Connection.<init>(AbstractJdbc2Connection.java:125)
     at org.postgresql.jdbc3.AbstractJdbc3Connection.<init>(AbstractJdbc3Connection.java:30)
     at org.postgresql.jdbc3.Jdbc3Connection.<init>(Jdbc3Connection.java:24)
     at org.postgresql.Driver.makeConnection(Driver.java:382)
     at org.postgresql.Driver.connect(Driver.java:260)
     at java.sql.DriverManager.getConnection(Unknown Source)
     at java.sql.DriverManager.getConnection(Unknown Source)
     at com.adventnet.zoho.client.report.advancedtool.AdvancedUploader.startUpload(AdvancedUploader.java:441)
     at com.adventnet.zoho.client.report.advancedtool.ZohoReportUploadDataFromDB.main(ZohoReportUploadDataFromDB.java:49)