Andrew Kryczka ed50308d20 check backup directory exists before listing children
Summary:
InsertPathnameToSizeBytes() is called on shared/ and shared_checksum/ directories, which only exist for certain configurations. If we try to list a non-existent directory's contents, some Envs will dump an error message. Let's avoid this by checking whether the directory exists before listing its contents.
Closes https://github.com/facebook/rocksdb/pull/1895

Differential Revision: D4596301

Pulled By: ajkr

fbshipit-source-id: c809679
2017-02-23 10:54:10 -08:00
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