patch: if ReadDirectoryChanges buffer was over-flooded, crawl the watched dir
From: Gunnar Dalsnes <hardon_at_online.no>
Date: Sat, 29 Aug 2009 16:39:55 -0700 (PDT)
patch: If there are many changes in the filesystem, the ReadDirectoryChanges 4KB buffer may be flooded and cleared (numBytes = 0). Failover to crawl the watched folder.
My goal is to get the filesystem watcher reliable enough to make most\all other explicit crawls redundant:-)
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