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One of the 'known issues', bullet points reads as follows, "... # gluster volume replace-brick <VOLNAME> commit command is issued, the file system operations on that particular volume, which are in transit will fail. Instead it should be, "... # gluster volume replace-brick <VOLNAME> <SRC-BRICK> <DST-BRICK> commit ..."
I have updated the Known Issues section's bullet point as "... # gluster volume replace-brick VOLNAME BRICK NEW-BRICK commit ...". The changes will be reflected from 3.2.4 release.