Push monitor thread can exit when address resolution fails

[2021/10/07 01:23:53.118] #<Thread:0x00005574ad3ddcc8@/data/mci/637652d91ea6b18aea0acca48c974a1e/astrolabe-src/mongo-ruby-driver/lib/mongo/background_thread.rb:112 run> terminated with exception (report_on_exception is true):

[2021/10/07 01:23:53.118] /data/mci/637652d91ea6b18aea0acca48c974a1e/astrolabe-src/mongo-ruby-driver/lib/mongo/address.rb:236:in `getaddrinfo': getaddrinfo: Name or service not known (SocketError)

[2021/10/07 01:23:53.118] 	from /data/mci/637652d91ea6b18aea0acca48c974a1e/astrolabe-src/mongo-ruby-driver/lib/mongo/address.rb:236:in `block in socket'

[2021/10/07 01:23:53.118] 	from /data/mci/637652d91ea6b18aea0acca48c974a1e/astrolabe-src/mongo-ruby-driver/lib/mongo/address.rb:286:in `map_exceptions'

[2021/10/07 01:23:53.118] 	from /data/mci/637652d91ea6b18aea0acca48c974a1e/astrolabe-src/mongo-ruby-driver/lib/mongo/address.rb:221:in `socket'

[2021/10/07 01:23:53.118] 	from /data/mci/637652d91ea6b18aea0acca48c974a1e/astrolabe-src/mongo-ruby-driver/lib/mongo/server/monitor/connection.rb:163:in `block in connect!'

[2021/10/07 01:23:53.118] 	from /data/mci/637652d91ea6b18aea0acca48c974a1e/astrolabe-src/mongo-ruby-driver/lib/mongo/server/connection_common.rb:146:in `add_server_diagnostics'

[2021/10/07 01:23:53.118] 	from /data/mci/637652d91ea6b18aea0acca48c974a1e/astrolabe-src/mongo-ruby-driver/lib/mongo/server/monitor/connection.rb:162:in `connect!'

[2021/10/07 01:23:53.118] 	from /data/mci/637652d91ea6b18aea0acca48c974a1e/astrolabe-src/mongo-ruby-driver/lib/mongo/server/push_monitor.rb:141:in `block in check'

[2021/10/07 01:23:53.118] 	from /data/mci/637652d91ea6b18aea0acca48c974a1e/astrolabe-src/mongo-ruby-driver/lib/mongo/server/push_monitor.rb:137:in `synchronize'

[2021/10/07 01:23:53.118] 	from /data/mci/637652d91ea6b18aea0acca48c974a1e/astrolabe-src/mongo-ruby-driver/lib/mongo/server/push_monitor.rb:137:in `check'

[2021/10/07 01:23:53.118] 	from /data/mci/637652d91ea6b18aea0acca48c974a1e/astrolabe-src/mongo-ruby-driver/lib/mongo/server/push_monitor.rb:100:in `block in do_work'

[2021/10/07 01:23:53.118] 	from /data/mci/637652d91ea6b18aea0acca48c974a1e/astrolabe-src/mongo-ruby-driver/lib/mongo/monitoring.rb:330:in `publish_heartbeat'

[2021/10/07 01:23:53.118] 	from /data/mci/637652d91ea6b18aea0acca48c974a1e/astrolabe-src/mongo-ruby-driver/lib/mongo/server/push_monitor.rb:99:in `do_work'

[2021/10/07 01:23:53.118] 	from /data/mci/637652d91ea6b18aea0acca48c974a1e/astrolabe-src/mongo-ruby-driver/lib/mongo/background_thread.rb:115:in `block (2 levels) in start!'

[2021/10/07 01:23:53.118] 	from /data/mci/637652d91ea6b18aea0acca48c974a1e/astrolabe-src/mongo-ruby-driver/lib/mongo/background_thread.rb:113:in `catch'

[2021/10/07 01:23:53.118] 	from /data/mci/637652d91ea6b18aea0acca48c974a1e/astrolabe-src/mongo-ruby-driver/lib/mongo/background_thread.rb:113:in `block in start!'