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bc10e1a171
The fix for SCYLLADB-1373 (b4f652b7c1) changed get_session() to use
the default timeout=30 for the retry loop in patient_*_cql_connection
(previously timeout=0.1). This correctly allowed retrying transient
NoHostAvailable errors during node startup, but introduced a new
flakiness in test_login and other auth tests.
The failure chain:
1. test_login connects with bad credentials (e.g. user="doesntexist")
2. get_session() calls patient_exclusive_cql_connection(), which calls
retry_till_success() with bypassed_exception=NoHostAvailable
3. The first attempt correctly fails: the server rejects the credentials
with AuthenticationFailed, wrapped in NoHostAvailable
4. retry_till_success() catches NoHostAvailable indiscriminately and
retries, not distinguishing between transient errors (node not ready)
and permanent errors (bad credentials)
5. A subsequent retry attempt times out (connect_timeout=5), producing
OperationTimedOut wrapped in NoHostAvailable
6. After 30 seconds, the last NoHostAvailable is raised -- now wrapping
OperationTimedOut instead of the original AuthenticationFailed
7. The assertion `isinstance(..., AuthenticationFailed)` fails
With the old timeout=0.1, the deadline was already exceeded after the
first attempt, so the original AuthenticationFailed propagated.
Fix: Add a `should_retry` predicate parameter to retry_till_success()
and use it in patient_cql_connection() and
patient_exclusive_cql_connection() to immediately re-raise
NoHostAvailable when it wraps AuthenticationFailed. Retrying
authentication failures is never useful since the credentials won't
change between attempts.
Fixes: SCYLLADB-1382
Closes scylladb/scylladb#29348