The issue seems to be due to the error documented in the Registry Admin Guide (https://nifi.apache.org/docs/nifi-registry-docs/html/administration-guide.html#system-requirements) if you don't have a JDK installed:   When running Registry with only a JRE you may encounter the following error as Flyway (database migration tool) attempts to utilize a resource from the JDK:   java.lang.RuntimeException: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'flywayInitializer' defined in class path resource [org/springframework/boot/autoconfigure/flyway/FlywayAutoConfiguration$FlywayConfiguration.class]: Invocation of init method failed; nested exception is org.flywaydb.core.api.FlywayException: Validate failed: Detected failed migration to version 1.3 (DropBucketItemNameUniqueness)   Try installing the  JDK , deleting the `database` directory that was created prior and then start the Registry. ... View more

Hi, @Jay Kumar SenSharma How can i use Ambari 2.6.0 with HDF 3.0.2, if supported version is different? Ambari is need Postgres 9.4, but HDF is need Postgres 9.5. https://docs.hortonworks.com/HDPDocuments/HDF3/HDF-3.0.2/bk_support-matrices/content/ch_matrices-hdf.html ... View more

Great. Glad you got to the bottom of it! ... View more