MyeoungDev opened a new issue, #8872: URL: https://github.com/apache/seatunnel/issues/8872
### Search before asking - [x] I had searched in the [issues](https://github.com/apache/seatunnel/issues?q=is%3Aissue+label%3A%22bug%22) and found no similar issues. ### What happened An `IndexOutOfBoundsException` occurs when using the `primary_keys` option in `JDBC Sink` with an empty array. The issue occurs when constructing `JdbcSink` inside `JdbcSinkFactory`. As per PR #5150, when `primary_keys` is `null`, the system automatically constructs a `PrimaryKey` using a `Unique Key`. To resolve this issue, the following modification is proposed: Before ```bash if (!config.getOptional(PRIMARY_KEYS).isPresent()) { ``` After ```bash List<String> primaryKeysOption = config.getOptional(PRIMARY_KEYS) .orElse(Collections.emptyList()); if (primaryKeysOption.isEmpty()) { ``` This change ensures that an empty array (`[]`) is treated consistently with a `null` value, preventing `IndexOutOfBoundsException` while maintaining existing behavior. ### SeaTunnel Version 2.3.9 ### SeaTunnel Config ```conf { "env": { "job.mode": "BATCH" }, "source": [ { "plugin_name": "Jdbc", "url": "jdbc:mysql://xx.xx.xxx.xxx:xxxx/seatunnel", "driver": "com.mysql.cj.jdbc.Driver", "user": "xxxx", "password": "xxxx", "database" : "seatunnel", "table" : "public.xxxx_xxxx", "query" : "SELECT * FROM public.xxxx_xxxx", "plugin_output": "seatunnel" } ], "sink": [ { "plugin_name": "Jdbc", "url": "jdbc:postgresql://xx.xx.xxx.xxx:xxxx/seatunnel", "driver": "org.postgresql.Driver", "user": "xxxx", "password": "xxxx", "database" : "seatunnel", "table" : "public.xxxx_xxxx", "generate_sink_sql": true, "plugin_input": "seatunnel", "primary_keys": [] } ] } ``` ### Running Command ```shell ./bin/seatunnel-cluster.sh -d -r master ``` ### Error Exception ```log [947010428246949889] 2025-02-26 15:01:29,878 ERROR [.s.e.s.c.CheckpointCoordinator] [hz.main.generic-operation.thread-30] - report error from task org.apache.seatunnel.common.utils.SeaTunnelException: java.lang.IndexOutOfBoundsException: Index 0 out of bounds for length 0 at java.base/jdk.internal.util.Preconditions.outOfBounds(Preconditions.java:64) at java.base/jdk.internal.util.Preconditions.outOfBoundsCheckIndex(Preconditions.java:70) at java.base/jdk.internal.util.Preconditions.checkIndex(Preconditions.java:248) at java.base/java.util.Objects.checkIndex(Objects.java:374) at java.base/java.util.ArrayList.get(ArrayList.java:459) at org.apache.seatunnel.connectors.seatunnel.jdbc.sink.JdbcSink.createWriter(JdbcSink.java:132) at org.apache.seatunnel.connectors.seatunnel.jdbc.sink.JdbcSink.createWriter(JdbcSink.java:66) at org.apache.seatunnel.api.sink.multitablesink.MultiTableSink.createWriter(MultiTableSink.java:80) at org.apache.seatunnel.engine.server.task.flow.SinkFlowLifeCycle.restoreState(SinkFlowLifeCycle.java:342) at org.apache.seatunnel.engine.server.task.SeaTunnelTask.lambda$restoreState$16(SeaTunnelTask.java:426) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1655) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at org.apache.seatunnel.engine.server.task.SeaTunnelTask.restoreState(SeaTunnelTask.java:423) at org.apache.seatunnel.engine.server.checkpoint.operation.NotifyTaskRestoreOperation.lambda$null$0(NotifyTaskRestoreOperation.java:107) at java.base/java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1736) at org.apache.seatunnel.api.tracing.MDCRunnable.run(MDCRunnable.java:43) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) at java.base/java.lang.Thread.run(Thread.java:829) at org.apache.seatunnel.engine.server.checkpoint.CheckpointCoordinator.reportCheckpointErrorFromTask(CheckpointCoordinator.java:391) ~[seatunnel-starter.jar:2.3.9] at org.apache.seatunnel.engine.server.checkpoint.CheckpointManager.reportCheckpointErrorFromTask(CheckpointManager.java:182) ~[seatunnel-starter.jar:2.3.9] at org.apache.seatunnel.engine.server.checkpoint.operation.CheckpointErrorReportOperation.runInternal(CheckpointErrorReportOperation.java:48) ~[seatunnel-starter.jar:2.3.9] at org.apache.seatunnel.engine.server.task.operation.TracingOperation.run(TracingOperation.java:42) ~[seatunnel-starter.jar:2.3.9] at com.hazelcast.spi.impl.operationservice.Operation.call(Operation.java:189) ~[seatunnel-starter.jar:2.3.9] at com.hazelcast.spi.impl.operationservice.impl.OperationRunnerImpl.call(OperationRunnerImpl.java:273) ~[seatunnel-starter.jar:2.3.9] at com.hazelcast.spi.impl.operationservice.impl.OperationRunnerImpl.run(OperationRunnerImpl.java:248) ~[seatunnel-starter.jar:2.3.9] at com.hazelcast.spi.impl.operationservice.impl.OperationRunnerImpl.run(OperationRunnerImpl.java:213) ~[seatunnel-starter.jar:2.3.9] at com.hazelcast.spi.impl.operationexecutor.impl.OperationThread.process(OperationThread.java:175) ~[seatunnel-starter.jar:2.3.9] at com.hazelcast.spi.impl.operationexecutor.impl.OperationThread.process(OperationThread.java:139) ~[seatunnel-starter.jar:2.3.9] at com.hazelcast.spi.impl.operationexecutor.impl.OperationThread.executeRun(OperationThread.java:123) ~[seatunnel-starter.jar:2.3.9] ``` ### Zeta or Flink or Spark Version Zeta ### Java or Scala Version Java 1.8 ### Screenshots _No response_ ### Are you willing to submit PR? - [x] Yes I am willing to submit a PR! ### Code of Conduct - [x] I agree to follow this project's [Code of Conduct](https://www.apache.org/foundation/policies/conduct) -- This is an automated message from the Apache Git Service. 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