mblesak commented on issue #13593:
URL: https://github.com/apache/iceberg/issues/13593#issuecomment-3116538814
@kumarpritam863 - we have observed these two NPEs in method:
CommiterImpl.close().
Both detected after: IcebergSinkTask.stop()
First:
```
[2025-07-22 14:10:49,860] WARN [iceberg-msk-connector-ecs-mbl-v12|task-1]
Could not stop task (org.apache.kafka.connect.runtime.WorkerSinkTask:180)
java.lang.NullPointerException: Cannot invoke "Object.getClass()" because
"context" is null
at
org.apache.iceberg.connect.channel.KafkaUtils.kafkaConsumer(KafkaUtils.java:89)
at
org.apache.iceberg.connect.channel.KafkaUtils.seekToLastCommittedOffsets(KafkaUtils.java:61)
at
org.apache.iceberg.connect.channel.CommitterImpl.stop(CommitterImpl.java:134)
at org.apache.iceberg.connect.IcebergSinkTask.close(IcebergSinkTask.java:65)
```
Second:
```
java.lang.NullPointerException: Cannot invoke
"org.apache.iceberg.connect.channel.KafkaClientFactory.createAdmin()" because
"this.clientFactory" is null
at
org.apache.iceberg.connect.channel.CommitterImpl.hasLeaderPartition(CommitterImpl.java:79)
at
org.apache.iceberg.connect.channel.CommitterImpl.close(CommitterImpl.java:139)
at org.apache.iceberg.connect.IcebergSinkTask.close(IcebergSinkTask.java:64)
at org.apache.iceberg.connect.IcebergSinkTask.stop(IcebergSinkTask.java:103)
at
org.apache.kafka.connect.runtime.WorkerSinkTask.close(WorkerSinkTask.java:178)
at org.apache.kafka.connect.runtime.WorkerTask.doClose(WorkerTask.java:183)
at org.apache.kafka.connect.runtime.WorkerTask.doRun(WorkerTask.java:216)
at org.apache.kafka.connect.runtime.WorkerTask.run(WorkerTask.java:259)
at
org.apache.kafka.connect.runtime.isolation.Plugins.lambda$withClassLoader$1(Plugins.java:237)
at
java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at
java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
at
java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
at java.base/java.lang.Thread.run(Thread.java:840)
```
We are currently testing stop() method in: CommiterImpl.stop() and its
reference from: IcebergSinkTask.stop() (instead of close()). Connector is
stable.
```
@Override
public void stop() {
stopCoordinator();
stopWorker();
}
```
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