pan3793 opened a new issue #2382:
URL: https://github.com/apache/iceberg/issues/2382
#2331 relocated the antlr4 classes in spark3 runtime module jar, but it
cause several issues.
For example,
```
spark.sql("ALTER TABLE t2 WRITE ORDERED BY birthday ASC, height DESC NULL
FIRST, weight ASC NULL LAST")
```
will cause
```
Exception in thread "main" java.lang.NoSuchMethodError:
org.apache.spark.sql.catalyst.parser.UpperCaseCharStream.<init>(Lorg/apache/iceberg/shaded/org/antlr/v4/runtime/CodePointCharStream;)V
at
org.apache.spark.sql.catalyst.parser.extensions.IcebergSparkSqlExtensionsParser.parse(IcebergSparkSqlExtensionsParser.scala:124)
at
org.apache.spark.sql.catalyst.parser.extensions.IcebergSparkSqlExtensionsParser.parsePlan(IcebergSparkSqlExtensionsParser.scala:105)
at
org.apache.spark.sql.SparkSession.$anonfun$sql$2(SparkSession.scala:605)
at
org.apache.spark.sql.catalyst.QueryPlanningTracker.measurePhase(QueryPlanningTracker.scala:111)
at
org.apache.spark.sql.SparkSession.$anonfun$sql$1(SparkSession.scala:605)
at org.apache.spark.sql.SparkSession.withActive(SparkSession.scala:764)
at org.apache.spark.sql.SparkSession.sql(SparkSession.scala:602)
at com.hiscat.iceberg.spark.QuickStart$.main(QuickStart.scala:70)
at com.hiscat.iceberg.spark.QuickStart.main(QuickStart.scala)
```
This because spark `UpperCaseCharStream` refer the original antlr4
`CharStream`, but Iceberg invoke the with relocated one.
And I think the root cause here is we just build a runtime jar with
relocation, but has none test on it.
Temporarily, I think we should revert #2331, because it broken the runtime
jar.
But we do need relocated antrl4, because Spark 3.1 use a different version
Antlr4 which will conflict with iceberg.
cc @aokolnychyi
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