Fix crash when parallel mc instances try to migrate session files at the same moment (#1812)
Fix crash when parallel mc instances try to migrate session files at the same moment (#1812)


CarterMcClellan/mc,balamurugana/mc,krisis/mc,krisis/mc,vadmeste/mc,CarterMcClellan/mc,balamurugana/mc,vadmeste/mc,abperiasamy/mc,abperiasamy/mc,minio/mc,minio/mc