Read test query results before reporting JDBC container as ready - #12090
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Included review availability: This review used your included allowance. Your plan provides up to 8 included reviews per hour; 7 remain after this review. 📝 WalkthroughWalkthroughJDBC container startup now applies a query timeout based on the remaining startup time when the driver supports it. Startup checks the deadline while reading query results and raises ChangesJDBC container readiness
Priority: ➖ Normal Estimated code review effort: 2 (Simple) | ~10 minutes Change: Bug fix · Severity of issue fixed: Medium Suggested reviewers: Merge Risk: 🔵 Low · up to Readiness now waits for query results, but a slow Trino fetch can delay startup beyond its configured timeout. The overrun is bounded by the driver timeout; merge with owner awareness or enforce the startup deadline during fetching. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
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✨ Finishing Touches 💡 1🛠️ Fix failing CI checks 💡
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Inline comments:
In
`@modules/jdbc/src/main/java/org/testcontainers/containers/JdbcDatabaseContainer.java`:
- Line 200: Update waitUntilContainerStarted so draining the ResultSet respects
the remaining startup deadline instead of relying on the driver's transport
timeout; use driver-compatible query timeout or cancellation where supported,
and stop waiting once the configured startup deadline expires.
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modules/jdbc/src/main/java/org/testcontainers/containers/JdbcDatabaseContainer.javamodules/jdbc/src/test/java/org/testcontainers/containers/JdbcDatabaseContainerTest.java
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The four Netlify failures on the previous head (356f8d8) all link to the same deployment, 6ab5310f87e6c80008615731. Its public API reports state Could someone with access check the deployment logs? The previous CircleCI minimal_core check passed; for the follow-up, the six focused JDBC tests and the JDBC formatting/checkstyle checks passed locally. |
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Fixes #6310
JdbcDatabaseContainer#waitUntilContainerStartedtreated the container as ready as soon asStatement#execute(testQuery)returnedtrue. That only means the query produced a result set. It does not mean the results can actually be read. As @szymonm found in the issue thread, Trino acceptsSELECT count(*) FROM tpch.tiny.nationduring startup, and the query then fails withNo nodes available to run queryonce the results are fetched. The container is reported ready anyway, and the first user query fails.This change reads the test query's result set to the end before returning. If fetching the results fails, the exception goes to the existing retry path and the query is tried again until it succeeds or the startup timeout is reached. The built-in test queries are constant or trivially small
SELECTs (SELECT 1,SELECT 1 FROM DUAL, OrientDB'sSELECT FROM Von a fresh database, ...), so reading their results costs essentially nothing for the other databases. The fix is in the sharedJdbcDatabaseContainer, so it covers bothTrinoContainerclasses (andPrestoContainer, which has the same structure) without copying the retry loop into each module.Tests
JdbcDatabaseContainerTest#testQueryIsRetriedIfReadingItsResultsFails. It uses a stubbed connection whereexecutesucceeds butResultSet#next()throws on the first attempt, and it asserts that the readiness check retries (2 connection attempts). It fails onmain(Expecting AtomicInteger(1) to have value: 2) and passes with this change. It needs no Docker and is deterministic, unlike the Trino startup race.Verification done:
./gradlew :testcontainers-jdbc:test: all tests pass./gradlew :testcontainers-trino:test :testcontainers-postgresql:testagainst real containers: 4/4 and 34/34 passspotlessApply,checkstyleMain,checkstyleTeston the jdbc module: clean(I used an AI coding assistant while preparing this change; I reviewed and tested it myself.)
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