Ceph - after upgrading to 2.4 - 10.2.7-32.el7cp OSD assert in FAILED assert(weak_refs.empty()) during OSD shutdown.

Issue

• After upgrading to 2.4 - 10.2.7-32.el7cp OSD assert in FAILED assert(weak_refs.empty()) during OSD shutdown.

-3> 2017-10-04 18:00:36.038817 7fdffe78d800 10 -- :/4103384 wait: done.
    -2> 2017-10-04 18:00:36.038818 7fdffe78d800  1 -- :/4103384 shutdown complete.
    -1> 2017-10-04 18:00:36.061972 7fdffe78d800 -1 leaked refs:
dump_weak_refs 0x5595a82d8cb0 weak_refs: 207607 = 0x5595ca644480 with 2 refs

     0> 2017-10-04 18:00:36.063904 7fdffe78d800 -1 ./common/shared_cache.hpp: In function 'SharedLRU<K, V, C, H>::~SharedLRU() [with K = unsigned int; V = const OSDMap; C = std::less<unsigned int>; H = std::hash<unsigned int>]' thread 7fdffe78d800 time 2017-10-04 18:00:36.061988

./common/shared_cache.hpp: 107: FAILED assert(weak_refs.empty())

 ceph version 10.2.7-32.el7cp (ef49626371ba965ec4d3f8eff67a811528c0a334)
 1: (ceph::__ceph_assert_fail(char const*, char const*, int, char const*)+0x85) [0x55959d432185]
 2: (()+0x3e96ca) [0x55959cde86ca]
 3: (OSDService::~OSDService()+0x18f) [0x55959cd75d0f]
 4: (OSD::~OSD()+0x133) [0x55959cdc1023]
 5: (OSD::~OSD()+0x9) [0x55959cdc1689]
 6: (main()+0x2d55) [0x55959cd147c5]
 7: (__libc_start_main()+0xf5) [0x7fdffb69dc05]
 8: (()+0x35fae7) [0x55959cd5eae7]