b79f13b2aa
Summary: Pointed out by https://github.com/facebook/rocksdb/issues/7197 , there is a double lock in WriteImplWALOnly. Also find another deadlock in UnorderedWriteMemtable. Move the check after switch_all_.notify_all(). Pull Request resolved: https://github.com/facebook/rocksdb/pull/7199 Test Plan: pass make check Reviewed By: anand1976 Differential Revision: D22961714 Pulled By: zhichao-cao fbshipit-source-id: 0707922dc50d28ea141a15a8cdcbd1c8993ea0d8