Ceph » crimson

Hello,

Using the `crimson-osd` Ubuntu package for Quincy, we're seeing somewhat recurrent crashes when trying to bring up the crimson OSD by e.g using `crimson-osd -i $ID`.

The following backtrace was produced:

0# crimson::os::seastore::lba_manager::btree::btree_pin_set_t::add_pin(crimson::os::seastore::lba_manager::btree::btree_range_pin_t&) at /home/ubuntu/src/ceph/build/../src/crimson/os/seastore/lba_manager/btree/btree_range_pin.h:86
1# operator() at /home/ubuntu/src/ceph/build/../src/crimson/os/seastore/lba_manager/btree/lba_btree.cc:467
2# _ZN7seastar12continuationINS_8internal22promise_base_with_typeIN5boost13intrusive_ptrIN7crimson2os8seastore11lba_manager5btree11LBALeafNodeEEEEEZNS5_9erroratorIJNS5_19unthrowable_wrapperIRKSt10error_codeL_ZNS5_2ecILSt4errc5EEEEEEEE7_futureINS5_23errorated_future_markerISB_EEE9safe_thenIZNS5_13interruptible27interruptible_future_detailINS7_28TransactionConflictConditionESP_E23safe_then_interruptibleILb1EZNS9_8LBABtree13get_leaf_nodeENS9_12op_context_tENS7_7paddr_tEEUlSB_E_SB_Li0EEEDaOT0_EUlOSB_E_NSL_12pass_furtherEEEDaOT_S11_EUlS16_E_ZNS_6futureISB_E17then_wrapped_nrvoISU_S17_EENS_8futurizeIS15_E4typeES11_EUlOSC_RS17_ONS_12future_stateISB_EEE_SB_E15run_and_disposeEv at /home/ubuntu/src/ceph/build/../src/seastar/include/seastar/core/future.hh:606
3# seastar::reactor::run_tasks(seastar::reactor::task_queue&) at /home/ubuntu/src/ceph/build/../src/seastar/src/core/reactor.cc:2231
4# seastar::reactor::run_some_tasks() [clone .part.0] at /home/ubuntu/src/ceph/build/../src/seastar/src/core/reactor.cc:2640
5# seastar::reactor::do_run() at /home/ubuntu/src/ceph/build/../src/seastar/src/core/reactor.cc:2809
6# seastar::reactor::run() at /home/ubuntu/src/ceph/build/../src/seastar/src/core/reactor.cc:2697
7# seastar::app_template::run_deprecated(int, char**, std::function<void ()>&&) at /home/ubuntu/src/ceph/build/../src/seastar/src/core/app-template.cc:218
8# seastar::app_template::run(int, char**, std::function<seastar::future<int> ()>&&) at /home/ubuntu/src/ceph/build/../src/seastar/src/core/app-template.cc:125
9# main at /home/ubuntu/src/ceph/build/../src/crimson/osd/main.cc:239
10# __libc_start_main in /lib64/libc.so.6

It appears to be random, or at the very least very hard to reproduce. It's happened with different types of OSD, although every crash that we know of happened when using the seastar backend.