pan3793 opened a new pull request, #54476:
URL: https://github.com/apache/spark/pull/54476
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JDK 24 introduces a behavior change on `ServiceLoader`'s returned iterator,
`iterator.hasNext()` might throw
`NoClassDefFoundError`, which previously only happened on `iterator.next()`.
See more details at OpenJDK
bug report [JDK-8350481](https://bugs.openjdk.org/browse/JDK-8350481)
Another issue is even the
[Javadoc](https://docs.oracle.com/en/java/javase/25/docs/api//java.base/java/util/ServiceLoader.html#iterator())
of `ServiceLoader` say
> Its hasNext and next methods can therefore throw a
ServiceConfigurationError for any of the reasons specified
> in the Errors section above. To write robust code it is only necessary to
catch ServiceConfigurationError when
> using the iterator. If an error is thrown then subsequent invocations of
the iterator will make a best effort
> to locate and instantiate the next available provider, but in general such
recovery cannot be guaranteed.
but it actually might throw `NoClassDefFoundError`. See more details at
OpenJDK bug report [JDK-8196182](https://bugs.openjdk.org/browse/JDK-8196182)
### Why are the changes needed?
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Enable Java 25 support.
### Does this PR introduce _any_ user-facing change?
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No.
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Changes in `HadoopDelegationTokenManager` are covered by UT, other 2 places
are not, need to review carefully.
```
$ export JAVA_HOME=/path/of/openjdk-25
$ build/sbt -Phive "hive/testOnly *HiveHadoopDelegationTokenManagerSuite"
```
Before
```
[info] Cause: java.lang.ClassNotFoundException:
org.apache.hadoop.hive.conf.HiveConf
[info] at
org.apache.spark.sql.hive.security.HiveHadoopDelegationTokenManagerSuite$$anon$1.loadClass(HiveHadoopDelegationTokenManagerSuite.scala:51)
[info] at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:490)
[info] at java.base/java.lang.Class.getDeclaredConstructors0(Native Method)
[info] at
java.base/java.lang.Class.privateGetDeclaredConstructors(Class.java:2985)
[info] at java.base/java.lang.Class.getConstructor0(Class.java:3180)
[info] at java.base/java.lang.Class.getConstructor(Class.java:2199)
[info] at
java.base/java.util.ServiceLoader.getConstructor(ServiceLoader.java:623)
[info] at
java.base/java.util.ServiceLoader$LazyClassPathLookupIterator.hasNextService(ServiceLoader.java:1111)
[info] at
java.base/java.util.ServiceLoader$LazyClassPathLookupIterator.hasNext(ServiceLoader.java:1142)
[info] at
java.base/java.util.ServiceLoader$1.hasNext(ServiceLoader.java:1164)
[info] at
java.base/java.util.ServiceLoader$2.hasNext(ServiceLoader.java:1246)
[info] at
org.apache.spark.deploy.security.HadoopDelegationTokenManager.loadProviders(HadoopDelegationTokenManager.scala:273)
[info] at
org.apache.spark.deploy.security.HadoopDelegationTokenManager.<init>(HadoopDelegationTokenManager.scala:79)
...
[info] Run completed in 1 second, 186 milliseconds.
[info] Total number of tests run: 3
[info] Suites: completed 1, aborted 0
[info] Tests: succeeded 2, failed 1, canceled 0, ignored 0, pending 0
[info] *** 1 TEST FAILED ***
[error] Failed tests:
[error]
org.apache.spark.sql.hive.security.HiveHadoopDelegationTokenManagerSuite
[error] (hive / Test / testOnly) sbt.TestsFailedException: Tests unsuccessful
[error] Total time: 192 s (0:03:12.0), completed Feb 25, 2026, 4:40:21 PM
```
After
```
[info] HiveHadoopDelegationTokenManagerSuite:
[info] - default configuration (44 milliseconds)
16:41:38.695 WARN
org.apache.spark.deploy.security.HadoopDelegationTokenManager:
spark.yarn.security.credentials.hive.enabled is deprecated. Please use
spark.security.credentials.hive.enabled instead.
[info] - using deprecated configurations (6 milliseconds)
[info] - SPARK-23209: obtain tokens when Hive classes are not available (284
milliseconds)
[info] Run completed in 1 second, 200 milliseconds.
[info] Total number of tests run: 3
[info] Suites: completed 1, aborted 0
[info] Tests: succeeded 3, failed 0, canceled 0, ignored 0, pending 0
[info] All tests passed.
[success] Total time: 33 s, completed Feb 25, 2026, 4:41:43 PM
```
A similar issue was fixed in Hadoop too, see HADOOP-19821. I created [a
simple project](https://github.com/pan3793/HADOOP-19821) to help reviewers
better understand this issue and solution.
### Was this patch authored or co-authored using generative AI tooling?
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No.
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