Data wrangler feed failed at step shown below.
on Kylo 0.8.2 sandbox
Looks like same issue as this guy
https://groups.google.com/forum/#!searchin/kylo-community/MergeTable$20$20%22Broken$20Pipe%22%7Csort:relevance/kylo-community/7hQq3YhN1es/JfkmvfcLBgAJ
Is it possible that HiveServer2 was restarted while NiFi was running? This is a known issue and will be fixed in the upcoming Kylo 0.8.3 release:
https://kylo-io.atlassian.net/browse/KYLO-940