java.util.ConcurrentModificationException

[fo40225]

When opening a large number of files via drag and drop, the following error message occurs:

SEVERE [LongRunningTask] Exception running task
SEVERE [LongRunningTask] java.util.ConcurrentModificationException
        at java.base/java.util.ArrayList$Itr.checkForComodification(ArrayList.java:1096)
        at java.base/java.util.ArrayList$Itr.next(ArrayList.java:1050)
        at org.igv/org.broad.igv.track.TrackGroup.getVisibleTracks(TrackGroup.java:90)
        at org.igv/org.broad.igv.ui.IGV.lambda$visibleTracks$23(IGV.java:2380)
        at java.base/java.util.stream.ReferencePipeline$7$1FlatMap.accept(ReferencePipeline.java:288)
        at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:197)
        at java.base/java.util.LinkedList$LLSpliterator.forEachRemaining(LinkedList.java:1250)
        at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:570)
        at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:560)
        at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:921)
        at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:265)
        at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:723)
        at org.igv/org.broad.igv.ui.IGV.visibleTracks(IGV.java:2381)
        at org.igv/org.broad.igv.ui.IGV.repaint(IGV.java:2275)
        at org.igv/org.broad.igv.ui.IGV.repaint(IGV.java:2261)
        at org.igv/org.broad.igv.ui.IGV.lambda$load$6(IGV.java:1321)
        at org.igv/org.broad.igv.util.LongRunningTask.call(LongRunningTask.java:73)
        at org.igv/org.broad.igv.util.LongRunningTask.call(LongRunningTask.java:43)
        at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:328)
        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1090)
        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:614)
        at java.base/java.lang.Thread.run(Thread.java:1474)

However, when using File > Load from file... to open the same large number of files simultaneously, it works normally.

Environment Information:

openjdk version "25" 2025-09-16 LTS
OpenJDK Runtime Environment Microsoft-12398178 (build 25+36-LTS)
OpenJDK 64-Bit Server VM Microsoft-12398178 (build 25+36-LTS, mixed mode, sharing)
INFO [Main] Startup  IGV Version 2.19.5 07/09/2025 01:47 PM
INFO [Main] Java 25 (build 25+36-LTS) 2025-09-16
INFO [Main] Java Vendor: Microsoft https://www.microsoft.com
INFO [Main] JVM: OpenJDK 64-Bit Server VM Microsoft-12398178
INFO [Main] OS: Windows Server 2022 10.0 amd64