jihoonson opened a new issue #8837: Kafka indexing task can fail during rolling update URL: https://github.com/apache/incubator-druid/issues/8837 ### Affected Version When updating 0.15 or earlier -> 0.16 ### Description https://github.com/apache/incubator-druid/pull/7319 has removed an unused parameter, but it can cause task failures during rolling update with the following error. ``` 2019-11-07T00:23:20,740 WARN [task-runner-0-priority-0] org.apache.druid.indexing.common.actions.RemoteTaskActionClient - Exception submitting action for task[index_kafka_clarity-cloud0_7c42ed11c91cf72_ghfhppbk] org.apache.druid.java.util.common.IOE: Error with status[400 Bad Request] and message[{"error":"Instantiation of [simple type, class org.apache.druid.indexing.common.actions.CheckPointDataSourceMetadataAction] value failed: currentCheckPoint (through reference chain: org.apache.druid.indexing.common.actions.TaskActionHolder[\"action\"])"}]. Check overlord logs for details. at org.apache.druid.indexing.common.actions.RemoteTaskActionClient.submit(RemoteTaskActionClient.java:94) [druid-indexing-service-0.16.0-incubating-iap3.jar:0.16.0-incubating-iap3] at org.apache.druid.indexing.seekablestream.SeekableStreamIndexTaskRunner.runInternal(SeekableStreamIndexTaskRunner.java:736) [druid-indexing-service-0.16.0-incubating-iap3.jar:0.16.0-incubating-iap3] at org.apache.druid.indexing.seekablestream.SeekableStreamIndexTaskRunner.run(SeekableStreamIndexTaskRunner.java:259) [druid-indexing-service-0.16.0-incubating-iap3.jar:0.16.0-incubating-iap3] at org.apache.druid.indexing.seekablestream.SeekableStreamIndexTask.run(SeekableStreamIndexTask.java:177) [druid-indexing-service-0.16.0-incubating-iap3.jar:0.16.0-incubating-iap3] at org.apache.druid.indexing.overlord.SingleTaskBackgroundRunner$SingleTaskBackgroundRunnerCallable.call(SingleTaskBackgroundRunner.java:419) [druid-indexing-service-0.16.0-incubating-iap3.jar:0.16.0-incubating-iap3] at org.apache.druid.indexing.overlord.SingleTaskBackgroundRunner$SingleTaskBackgroundRunnerCallable.call(SingleTaskBackgroundRunner.java:391) [druid-indexing-service-0.16.0-incubating-iap3.jar:0.16.0-incubating-iap3] at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_212] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_212] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_212] at java.lang.Thread.run(Thread.java:748) [?:1.8.0_212] ``` To fix this issue, `CheckPointDataSourceMetadataAction` can have a method as below to add the missing property in its serialized JSON. ```java // For backwards compatibility @Deprecated @JsonProperty public SeekableStreamDataSourceMetadata getCurrentCheckPoint() { return checkpointMetadata; } ```
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