jarohen commented on code in PR #40987:
URL: https://github.com/apache/arrow/pull/40987#discussion_r1551915546
##########
java/vector/src/main/java/org/apache/arrow/vector/ipc/JsonFileWriter.java:
##########
@@ -208,6 +210,10 @@ private void writeBatch(VectorSchemaRoot recordBatch)
throws IOException {
}
private void writeFromVectorIntoJson(Field field, FieldVector vector) throws
IOException {
+ if (vector instanceof ExtensionTypeVector) {
Review Comment:
@pitrou that's strange :thinking:
The test in this PR fails without the associated code change. It throws
`UnsupportedOperation minor type: EXTENSIONTYPE`, from
[here](https://github.com/apache/arrow/blob/72d20ad719021c5513620e23a0a65fb724f0e299/java/vector/src/main/java/org/apache/arrow/vector/ipc/JsonFileWriter.java#L432)
- which seems correct, there's no case in there for EXTENSIONTYPE.
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