davidyuan1223 commented on PR #6980:
URL: https://github.com/apache/kyuubi/pull/6980#issuecomment-2748374165
> @davidyuan1223 I don't understand what the exact issue is, we use Paimon
spark 3-3 artifacts for testing, why ClassNotFoundException
`org.apache.spark.sql.connector.catalog.Column`(introduced in Spark 3.5) is
thrown? can you elaborate more about what the underlying happened? it's Kyuubi
authz side issue or Paimon issue?
this is the error trace(we only talk about spark3.3
```
Cause: java.lang.ClassNotFoundException:
org.apache.spark.sql.connector.catalog.Column
at java.net.URLClassLoader.findClass(URLClassLoader.java:387)
at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:352)
at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2701)
at java.lang.Class.getDeclaredMethod(Class.java:2128)
at
org.apache.kyuubi.util.reflect.DynMethods$Builder.hiddenImpl(DynMethods.java:408)
at
org.apache.kyuubi.util.reflect.DynMethods$Builder.hiddenImpl(DynMethods.java:429)
at
org.apache.kyuubi.util.reflect.ReflectUtils$.invokeAs(ReflectUtils.scala:81)
```
this question, i think the root case is the ReflectUtils,which will execute
reflect to find targetClass's method instance, in the moment, the code env is
from our spark3.3 version, when call XXX.properties method, which need Column
class, but in spark3.3 env, the Column not exists. Just like classLoader will
first use the bootstrapClassLoader? i'm not sure, but i think the root cause
may be the ReflectUtils
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