NIFI-6182: Updated dependency on Lucene to Lucene 8.0.0. Updated code…

[markap14]

… necessary to use the new API. Updated WriteAheadProvenanceRepository so that upon startup if provenance indexes are written using the old Lucene format, , they are considered 'defunct' and the events are re-indexed in a background thread into a new index that uses the Lucene 8 format and the old index is then removed. Added Provenance Repository that consists of about 30 events and added integration test to ensure that the repo can be started up/initialized when pointing to a prov repo that was written using the old lucene format.

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[alecosborne]

Hi,
we wanted to migrate our Nifi version from 1.9.2 to 1.10.0. We did not succeed. It was not possible for us after the update to access the old provenance events. We have not changed anything in our configuration. I read that after the update the index is rebuilt. Can that be a reason or do I have to consider something special? After I changed back to version 1.9.2, my old provenance events were immediately available again.

Do you have any tips on what I can check?

Many thanks
With kind regards