It looks like a pg dump immediately after a pool create happened so fast that the pg wasn't even there in "creating" state yet.
Normally the ceph pg dump would see the pg in "creating" state right after the pool is created, but maybe there is a VERY small window before that happens.
2016-04-28T23:55:56.969 INFO:teuthology.orchestra.run.smithi060:Running: 'sudo adjust-ulimits ceph-coverage /home/ubuntu/cephtest/archive/coverage ceph osd pool create repair_pool_1 1'
2016-04-28T23:55:57.761 INFO:teuthology.orchestra.run.smithi060.stderr:pool 'repair_pool_1' created
2016-04-28T23:55:57.776 INFO:tasks.repair_test:starting repair test type 1
2016-04-28T23:55:57.777 INFO:tasks.repair_test:Choosing replica
2016-04-28T23:55:57.777 INFO:teuthology.orchestra.run.smithi060:Running: 'sudo adjust-ulimits ceph-coverage /home/ubuntu/cephtest/archive/coverage ceph pg dump --format=json'
2016-04-28T23:55:57.911 INFO:teuthology.orchestra.run.smithi060.stderr:dumped all in format json
2016-04-28T23:55:57.923 INFO:teuthology.orchestra.run.smithi060:Running: 'sudo adjust-ulimits ceph-coverage /home/ubuntu/cephtest/archive/coverage ceph osd dump --format=json'
2016-04-28T23:55:58.132 ERROR:teuthology.run_tasks:Saw exception from tasks.
Traceback (most recent call last):
File "/home/teuthworker/src/teuthology_master/teuthology/run_tasks.py", line 66, in run_tasks
manager = run_one_task(taskname, ctx=ctx, config=config)
File "/home/teuthworker/src/teuthology_master/teuthology/run_tasks.py", line 45, in run_one_task
return fn(**kwargs)
File "/var/lib/teuthworker/src/ceph-qa-suite_master/tasks/repair_test.py", line 304, in task
repair_test_1(ctx, dataerr, choose_replica, "deep-scrub")
File "/var/lib/teuthworker/src/ceph-qa-suite_master/tasks/repair_test.py", line 84, in repair_test_1
victim_osd = chooser(ctx, pool, 0)
File "/var/lib/teuthworker/src/ceph-qa-suite_master/tasks/repair_test.py", line 26, in choose_replica
return ctx.manager.get_pg_replica(pool, num)
File "/var/lib/teuthworker/src/ceph-qa-suite_master/tasks/ceph_manager.py", line 1004, in get_pg_replica
assert False
AssertionError