pan3793 commented on PR #46521:
URL: https://github.com/apache/spark/pull/46521#issuecomment-2104034238
I think the case is already covered by CI.
When IsolatedClassLoader is enabled, the `Hive.get` should pull and load
CodeHaus Jackson classes from IsolatedClassLoader.
```
/**
* Initialize Hive through Configuration.
* First try to use getWithoutRegisterFns to initialize to avoid loading
all functions,
* if there is no such method, fallback to Hive.get.
*/
def getHive(conf: Configuration): Hive = {
val hiveConf = conf match {
case hiveConf: HiveConf =>
hiveConf
case _ =>
new HiveConf(conf, classOf[HiveConf])
}
try {
Hive.getWithoutRegisterFns(hiveConf)
} catch {
// SPARK-37069: not all Hive versions have the above method (e.g.,
Hive 2.3.9 has it but
// 2.3.8 don't), therefore here we fallback when encountering the
exception.
case _: NoSuchMethodError =>
Hive.get(hiveConf)
}
```
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