gertwieland opened a new issue, #7219: URL: https://github.com/apache/hop/issues/7219
### Apache Hop version? 2.18 Production ### Java version? java.version=21.0.11 java.vm.vendor=Eclipse Adoptium ### Operating system Windows ### What happened? **Setup** Sort Rows (20 copies) -> Sorted Merge Only 2 incoming records **Error** <img width="195" height="172" alt="Image" src="https://github.com/user-attachments/assets/c76edd01-e2ba-471a-95d6-906e56ceca3a"; /> 026/06/03 12:00:50 [Error] Sorted merge 4.0 - Unexpected error 2026/06/03 12:00:50 [Error] Sorted merge 4.0 - java.lang.IndexOutOfBoundsException: Index 1 out of bounds for length 1 2026/06/03 12:00:50 [Error] Sorted merge 4.0 - at java.base/jdk.internal.util.Preconditions.outOfBounds(Preconditions.java:100) 2026/06/03 12:00:50 [Error] Sorted merge 4.0 - at java.base/jdk.internal.util.Preconditions.outOfBoundsCheckIndex(Preconditions.java:106) 2026/06/03 12:00:50 [Error] Sorted merge 4.0 - at java.base/jdk.internal.util.Preconditions.checkIndex(Preconditions.java:302) 2026/06/03 12:00:50 [Error] Sorted merge 4.0 - at java.base/java.util.Objects.checkIndex(Objects.java:385) 2026/06/03 12:00:50 [Error] Sorted merge 4.0 - at java.base/java.util.ArrayList.get(ArrayList.java:427) 2026/06/03 12:00:50 [Error] Sorted merge 4.0 - at org.apache.hop.pipeline.transforms.sortedmerge.SortedMerge.getRowSortedFirstCall(SortedMerge.java:145) 2026/06/03 12:00:50 [Error] Sorted merge 4.0 - at org.apache.hop.pipeline.transforms.sortedmerge.SortedMerge.getRowSorted(SortedMerge.java:60) 2026/06/03 12:00:50 [Error] Sorted merge 4.0 - at org.apache.hop.pipeline.transforms.sortedmerge.SortedMerge.processRow(SortedMerge.java:180) 2026/06/03 12:00:50 [Error] Sorted merge 4.0 - at org.apache.hop.pipeline.transform.RunThread.run(RunThread.java:54) 2026/06/03 12:00:50 [Error] Sorted merge 4.0 - at java.base/java.lang.Thread.run(Thread.java:1583) When running Sort Rows with only 1 copy, it runs fine <img width="184" height="178" alt="Image" src="https://github.com/user-attachments/assets/fb2ee8c8-8d30-4918-a287-414193a71853"; /> ### Issue Priority Priority: 1 ### Issue Component Component: Hop Gui -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
