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***** !!!! THIS BUG TRACKER IS FOR GERRIT CODE REVIEW !!!!  *****
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***** DO NOT SUBMIT BUGS FOR CHROME, ANDROID, CYANOGENMOD,  *****
***** INTERNAL ISSUES WITH YOUR COMPANY'S GERRIT SETUP, ETC.*****
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*****   THOSE ISSUES BELONG IN DIFFERENT ISSUE TRACKERS     *****
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Affected Version: stable-2.15

What steps will reproduce the problem?
1. Initialize gerrit with 2.14.x using ES as secondary index
2. Have some changes in the system
3. Upgrade to 2.15.x and let online reindex run

What is the expected output?

Online reindex runs and changes, etc, are visible in the UI

What do you see instead?

Online reindex appears to run (per logs) and the new index versions are visible in ES, but nothing is visible in the Gerrit UI until after doing an offline reindex.


Please provide any additional information below.