Github user trkurc commented on the pull request:
https://github.com/apache/nifi/pull/206#issuecomment-180928291
@apiri - +1, works great. Only bit of weirdness, if the old state file was
chmod 0400'ed (i.e., only read access) when I launched nifi, it was still
deleted after migration. chattr +i'ing the file kept it from being deleted
though. may be something for the migration guide.
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