[dongjoon-hyun]

What changes were proposed in this pull request?

This PR aims to upgrade Iceberg to 1.12.0 in the spark-connect-server-iceberg.yaml example.

Why are the changes needed?

To use the latest Iceberg release.

• https://github.com/apache/iceberg/releases/tag/apache-iceberg-1.12.0 (2026-09-30)

Does this PR introduce any user-facing change?

No.

How was this patch tested?

Pass the CIs and manually tests.

$ kubectl apply -f examples/spark-connect-server-iceberg.yaml
sparkapplication.spark.apache.org/spark-connect-server-iceberg created

$ kubectl get sparkapp
NAME                           AGE   CURRENT STATE
spark-connect-server-iceberg   6s    DriverReady

$ kubectl get pod
NAME                                         READY   STATUS    RESTARTS   AGE
localstack                                   1/1     Running   0          50s
spark-connect-server-iceberg-0-driver        1/1     Running   0          15s
spark-kubernetes-operator-5c4476f5d9-8fflq   1/1     Running   0          5m15s

$ kubectl logs spark-connect-server-iceberg-0-driver | grep iceberg-spark-runtime | head -n2
org.apache.iceberg#iceberg-spark-runtime-4.1_2.13 added as a dependency
	found org.apache.iceberg#iceberg-spark-runtime-4.1_2.13;1.12.0 in central

$ kubectl port-forward spark-connect-server-iceberg-0-driver 15002
Forwarding from 127.0.0.1:15002 -> 15002
Forwarding from [::1]:15002 -> 15002

$ bin/spark-connect-shell --remote sc://localhost:15002
...
Welcome to
      ____              __
     / __/__  ___ _____/ /__
    _\ \/ _ \/ _ `/ __/  '_/
   /___/ .__/\_,_/_/ /_/\_\   version 4.1.3
      /_/

Type in expressions to have them evaluated.
Spark connect server version 4.1.3.
Spark session available as 'spark'.
scala>
sql("""CREATE TABLE taxis(vendor_id bigint, trip_id bigint, trip_distance float, fare_amount double, store_and_fwd_flag string) PARTITIONED BY (vendor_id);""").show()

scala>
sql("""INSERT INTO taxis VALUES (1, 1000371, 1.8, 15.32, 'N'), (2, 1000372, 2.5, 22.15, 'N'), (2, 1000373, 0.9, 9.01, 'N'), (1, 1000374, 8.4, 42.13, 'Y');""").show()

scala> sql("SELECT * FROM taxis").show(false)
+---------+-------+-------------+-----------+------------------+
|vendor_id|trip_id|trip_distance|fare_amount|store_and_fwd_flag|
+---------+-------+-------------+-----------+------------------+
|1        |1000374|8.4          |42.13      |Y                 |
|1        |1000371|1.8          |15.32      |N                 |
|2        |1000373|0.9          |9.01       |N                 |
|2        |1000372|2.5          |22.15      |N                 |
+---------+-------+-------------+-----------+------------------+

scala> sql("SELECT * FROM taxis.history").show(false)
+-----------------------+-------------------+---------+-------------------+
|made_current_at        |snapshot_id        |parent_id|is_current_ancestor|
+-----------------------+-------------------+---------+-------------------+
|2026-09-30 21:35:59.331|1296194957924373327|NULL     |true               |
+-----------------------+-------------------+---------+-------------------+

scala> sql("SELECT * FROM taxis VERSION AS OF 1296194957924373327").show(false)
+---------+-------+-------------+-----------+------------------+
|vendor_id|trip_id|trip_distance|fare_amount|store_and_fwd_flag|
+---------+-------+-------------+-----------+------------------+
|1        |1000374|8.4          |42.13      |Y                 |
|1        |1000371|1.8          |15.32      |N                 |
|2        |1000373|0.9          |9.01       |N                 |
|2        |1000372|2.5          |22.15      |N                 |
+---------+-------+-------------+-----------+------------------+

Was this patch authored or co-authored using generative AI tooling?

Generated-by: Claude Opus 5.5

[dongjoon-hyun]

Thank you, @peter-toth !

[dongjoon-hyun]

Merged to main