Issue

• OSD asserts preceded by be_scan_list got: (61) No data available
• OSD has been marked down and cannot be brought back online

2017-01-29 01:22:43.084520 7f09eabb7700 -1 osd.12 pg_epoch: 7491 pg[4.7ec( v 7491'1735451 (6611'1732354,7491'1735451] local-les=7196 n=320 ec=1053 les/c 7196/7196 7195/7195/7067) [96,153,70] r=1 lpr=7195 pi=7065-7194/3 luod=0'0 crt=7491'
1735449 lcod 7491'1735450 active] be_scan_list got: (61) No data available
2017-01-29 01:22:43.093691 7f09eabb7700 -1 osd/PGBackend.cc: In function 'void PGBackend::be_scan_list(ScrubMap&, const std::vector<hobject_t>&, bool, uint32_t, ThreadPool::TPHandle&)' thread 7f09eabb7700 time 2017-01-29 01:22:43.084951
osd/PGBackend.cc: 368: FAILED assert(0)