DB Tsai created SPARK-57482:
-------------------------------
Summary: Flaky SparkLauncherSuite.testInProcessLauncher due to
short connection-establishment timeout
Key: SPARK-57482
URL: https://issues.apache.org/jira/browse/SPARK-57482
Project: Spark
Issue Type: Test
Components: Spark Core, Tests
Affects Versions: 5.0.0
Reporter: DB Tsai
{{SparkLauncherSuite.testInProcessLauncher}} waits for the connection between
the in-process app and the launcher to be established by polling the app handle
state with {{eventually(Duration.ofSeconds(5), Duration.ofMillis(10))}}. Under
heavy CI load this 5-second window is too short: the handle can remain in
{{UNKNOWN}} for longer, causing the test to fail with:
{code}
java.lang.IllegalStateException: Failed check after 476 tries: expected: not
equal but was: <UNKNOWN>.
at org.apache.spark.launcher.BaseSuite.eventually(BaseSuite.java:88)
at
org.apache.spark.launcher.SparkLauncherSuite.inProcessLauncherTestImpl(SparkLauncherSuite.java:162)
at
org.apache.spark.launcher.SparkLauncherSuite.testInProcessLauncher(SparkLauncherSuite.java:130)
{code}
The fix increases the timeout to 30 seconds with a 100ms poll interval,
consistent with {{waitForSparkContextShutdown}} (30s/100ms) and the other
{{eventually}} calls in this suite (60s/1000ms). Test-only change; no
production behavior is affected.
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