Why broker logs are showing "Failed to read metadata from hosted-engine.metadata No such file or directory"

Issue

• Can see below events in the broker log. However, these error messages are not continuous and get fixed automatically.

Thread-2::ERROR::2017-11-09 12:49:48,822::storage_broker::138::ovirt_hosted_engine_ha.broker.storage_broker.StorageBroker::(get_raw_stats_for_service_type) Failed to read metadata from /rhev/data-center/mnt/blockSD/aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa/ha_agent/hosted-engine.metadata
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/ovirt_hosted_engine_ha/broker/storage_broker.py", line 129, in get_raw_stats_for_service_type
    f = os.open(path, direct_flag | os.O_RDONLY | os.O_SYNC)
OSError: [Errno 2] No such file or directory: '/rhev/data-center/mnt/blockSD/aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa/ha_agent/hosted-engine.metadata'