potiuk commented on a change in pull request #13424:
URL: https://github.com/apache/airflow/pull/13424#discussion_r550804978
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File path: scripts/in_container/check_environment.sh
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@@ -21,6 +21,21 @@ EXIT_CODE=0
DISABLED_INTEGRATIONS=""
+# We want to perform only forward lookup of the service IP address. Netcat
when run without -n
+# Performs both forward and reverse lookup and fails if the reverse lookup
name does not match
+# original name even if the host is reachable via IP. This happens randomly
with docker-compose
+# in Github Actions (apparently it is some race condition when one service
starts before DNS)
+# Since we are not using reverse lookup elsewhere we can perform forward
lookup in python
+# And use the IP in NC and add '-n' switch to disable any DNS use.
Review comment:
```suggestion
# and use the IP in NC and add '-n' switch to disable any DNS use.
```
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