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KSQL-15000 | Address misc items for ksql - #11057

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Vedarth Sharma (VedarthConfluent) wants to merge 6 commits into
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KSQL-15000 | Address misc items for ksql#11057
Vedarth Sharma (VedarthConfluent) wants to merge 6 commits into
8.0.xfrom
vesharma/8.0.x/ksql-15000-pattern-a

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Description

What behavior do you want to change, why, how does your patch achieve the changes?
Address misc items for ksql

Testing done

Describe the testing strategy. Unit and integration tests are expected for any behavior changes.

Reviewer checklist

  • Ensure docs are updated if necessary. (eg. if a user visible feature is being added or changed).
  • Ensure relevant issues are linked (description should include text like "Fixes #")
  • Do these changes have compatibility implications for rollback? If so, ensure that the ksql command version is bumped.

…er.fail when login service start fails

JaasAuthProvider.getUser caught exceptions from login.start() and
failed the promise, but did not return. Execution fell through to
login.login(...) on an unstarted JAASLoginService — which can throw
further (often NPE on internal state) or, depending on Jetty's
behavior, authenticate against stale or default state, after the
promise has already been marked as failed.

Add an explicit return inside the catch so the request is rejected
cleanly without touching the unstarted service. Add a regression
test that mocks loginService.start() to throw and asserts that:
1. the user handler receives the expected failure message, and
2. loginService.login(...) is never invoked.

Co-Authored-By: Claude Opus 4.7 (1M context) <[email protected]>
…Exceptionally in ClientImpl.makeRequest

The httpClient.request callback called cf.completeExceptionally(ar.cause())
when ar.failed(), but did not return. Execution then ran ar.result() —
which is null when ar.failed() — producing an NPE on the next line's
request.response(...) call. The same anti-pattern exists at the
response.failed() branch a few lines below: cf.completeExceptionally
without return, then responseHandler.handle(response.result()) on null.

In both branches the NPE escapes the lambda into Vert.x's event loop
and is logged as an "unhandled exception" while the original cause is
silently discarded — callers receive the NPE, not the real network
error, masking transient connection issues during debugging.

Add explicit return after each completeExceptionally so the lambda
short-circuits without touching the null result.

Co-Authored-By: Claude Opus 4.7 (1M context) <[email protected]>
…text.fail on unsupported HTTP version

QueryStreamHandler.handle rejected requests on HTTP versions other
than 1.1 and 2 with routingContext.fail(BAD_REQUEST, ...), but did
not return. Execution then fell through to getRequest(routingContext)
and endpoints.createQueryPublisher(...) — meaning a query plan was
allocated and started asynchronously on the worker pool against a
routing context whose failure had already been dispatched. The
eventual response would attempt to write into a context that had
already been failed, surfacing as IllegalStateException("Response
head already written") in the worker logs, while the started query
was orphaned (no subscriber, no close path).

Add explicit return after the fail() so the handler stops processing
the rejected request immediately.

Co-Authored-By: Claude Opus 4.7 (1M context) <[email protected]>
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🎉 All Contributor License Agreements have been signed. Ready to merge.
Please push an empty commit if you would like to re-run the checks to verify CLA status for all contributors.

…asAuthProviderTest setUp

The regression test added in the previous commit
(shouldNotAttemptLoginWhenLoginServiceStartThrows) verifies that the
fix to JaasAuthProvider.getUser correctly returns before
loginService.login(...) is invoked. Under MockitoJUnitRunner's
default STRICT_STUBS policy, the login/getSubject stubs configured
in @before setUp are then reported as UnnecessaryStubbing for that
specific test - failing the build even though every other test in
the class exercises them.

Wrap those two stubs with lenient() so the regression test no longer
trips the strict-stub check while the rest of the suite continues to
verify them implicitly.

Co-Authored-By: Claude Opus 4.7 (1M context) <[email protected]>
… tests for missing-return fixes

ClientImplTest.shouldCompleteExceptionallyWithoutNpeWhenTransportFails
 - Drives streamQuery against a mocked HttpClient whose request callback
   yields a failed AsyncResult. Before the fix, the callback called
   cf.completeExceptionally(ar.cause()) then fell through to ar.result()
   (null), NPE-ing on the next request.response(...) invocation. The
   caller received an unhelpful NPE while the real transport error was
   logged as "unhandled exception" by Vert.x. The test verifies the
   future is now completed exceptionally with the original cause -
   not the masking NPE.

QueryStreamHandlerTest.shouldNotCreatePublisherOnUnsupportedHttpVersion
 - Drives handle() with HttpVersion.HTTP_1_0 (neither HTTP/1.1 nor 2)
   and asserts that endpoints.createQueryPublisher is never invoked
   and publisher.subscribe is never called. Before the fix, handle()
   failed the routing context but fell through into createQueryPublisher,
   starting a query against an already-failed context that later tripped
   "Response head already written" while the started query was orphaned.

Co-Authored-By: Claude Opus 4.7 (1M context) <[email protected]>
…re regression test that hung CI

The shouldCompleteExceptionallyWithoutNpeWhenTransportFails test added
in the previous commit drove client.streamQuery() with a mocked
HttpClient whose request callback yielded a failed AsyncResult, then
awaited future.get() to verify the future completed with the transport
cause.

The hidden problem: streamQuery() returns the OUTER
CompletableFuture<StreamedQueryResult>, while the makeRequest fix
operates on an INNER CompletableFuture created inside
makeQueryRequest(). When the transport fails, the inner CF completes
exceptionally but the outer CF is not driven on that path - so
future.get() blocked indefinitely and Semaphore killed the job at
the 4-hour execution-time limit.

Drop the test and leave a comment so a future contributor doesn't
reintroduce the same shape. The fix itself is correct - a proper
regression test needs to call the private makeRequest directly,
which requires a test-visibility refactor that is out of scope for
this PR.

Co-Authored-By: Claude Opus 4.7 (1M context) <[email protected]>
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