Lee Hinman 60c1dcde88 Only flush Watcher's bulk processor if Watcher is enabled (#38803)
When shutting down Watcher, the `bulkProcessor` is null if watcher has been
disabled in the configuration. This protects the flush and close calls with a
check for watcher enabled to avoid a NullPointerException

Resolves #38798
2019-02-13 16:13:53 -07:00
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