The Configuration wizard appears to run on an additional poller engine updates the database, in particular the indexes. Support case# 834741
This means you cannot run multiple install wizards at once to upgrade several additional pollers at once.
With a small install the dbUpdate probably complete quickly, but with a large install this causes deadlock and [at least] one of them will fail, causing the configuration wizard to fail on that additional poller.
I feel that dbUpdates should only be performed on the application server install, and that the additional pollers should only check/require that they have been installed there before moving on -- updating the database schema from additional poller installs seems like an idea fraught with challenge best left un-met.
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