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Gary D. Gregory commented on COLLECTIONS-838: --------------------------------------------- [~Gomoliako] If you're not happy with the progress of any issue, the best path forward is to offer a solution in the form of a pull request on GitHub (with a unit test) ;) > Calling SetUtils.union on multiple instances of SetView causes JVM to hang > -------------------------------------------------------------------------- > > Key: COLLECTIONS-838 > URL: https://issues.apache.org/jira/browse/COLLECTIONS-838 > Project: Commons Collections > Issue Type: Bug > Components: Collection > Affects Versions: 4.4 > Reporter: Tanmay Ambre > Priority: Major > Attachments: Test1.java > > > hi, > > Please have a look at the attached test class. If I call the SetUtils.union > multiple times (~40) the JVM hangs. However, it will complete if I reduce the > iterations (~30). > > Stack Trace: > > "main" #1 prio=5 os_prio=31 cpu=829612.28ms elapsed=839.75s > tid=0x000000015d008a00 nid=0x1803 runnable [0x000000016ffc1000] > java.lang.Thread.State: RUNNABLE > at > org.apache.commons.collections4.iterators.IteratorChain.updateCurrentIterator(IteratorChain.java:222) > at > org.apache.commons.collections4.iterators.IteratorChain.hasNext(IteratorChain.java:236) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.FilterIterator.setNextObject(FilterIterator.java:174) > at > org.apache.commons.collections4.iterators.FilterIterator.hasNext(FilterIterator.java:86) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.IteratorChain.updateCurrentIterator(IteratorChain.java:222) > at > org.apache.commons.collections4.iterators.IteratorChain.hasNext(IteratorChain.java:236) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.FilterIterator.setNextObject(FilterIterator.java:174) > at > org.apache.commons.collections4.iterators.FilterIterator.hasNext(FilterIterator.java:86) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.IteratorChain.updateCurrentIterator(IteratorChain.java:222) > at > org.apache.commons.collections4.iterators.IteratorChain.hasNext(IteratorChain.java:236) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.FilterIterator.setNextObject(FilterIterator.java:174) > at > org.apache.commons.collections4.iterators.FilterIterator.hasNext(FilterIterator.java:86) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.IteratorChain.updateCurrentIterator(IteratorChain.java:222) > at > org.apache.commons.collections4.iterators.IteratorChain.hasNext(IteratorChain.java:236) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.FilterIterator.setNextObject(FilterIterator.java:174) > at > org.apache.commons.collections4.iterators.FilterIterator.hasNext(FilterIterator.java:86) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.IteratorChain.updateCurrentIterator(IteratorChain.java:222) > at > org.apache.commons.collections4.iterators.IteratorChain.hasNext(IteratorChain.java:236) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.FilterIterator.setNextObject(FilterIterator.java:174) > at > org.apache.commons.collections4.iterators.FilterIterator.hasNext(FilterIterator.java:86) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.IteratorChain.hasNext(IteratorChain.java:239) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.FilterIterator.setNextObject(FilterIterator.java:174) > at > org.apache.commons.collections4.iterators.FilterIterator.hasNext(FilterIterator.java:86) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.IteratorChain.updateCurrentIterator(IteratorChain.java:222) > at > org.apache.commons.collections4.iterators.IteratorChain.hasNext(IteratorChain.java:236) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.FilterIterator.setNextObject(FilterIterator.java:174) > at > org.apache.commons.collections4.iterators.FilterIterator.hasNext(FilterIterator.java:86) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.IteratorChain.hasNext(IteratorChain.java:239) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.FilterIterator.setNextObject(FilterIterator.java:174) > at > org.apache.commons.collections4.iterators.FilterIterator.hasNext(FilterIterator.java:86) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.IteratorChain.updateCurrentIterator(IteratorChain.java:222) > at > org.apache.commons.collections4.iterators.IteratorChain.hasNext(IteratorChain.java:236) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.FilterIterator.setNextObject(FilterIterator.java:174) > at > org.apache.commons.collections4.iterators.FilterIterator.hasNext(FilterIterator.java:86) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.IteratorChain.hasNext(IteratorChain.java:239) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.FilterIterator.setNextObject(FilterIterator.java:174) > at > org.apache.commons.collections4.iterators.FilterIterator.hasNext(FilterIterator.java:86) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.IteratorChain.hasNext(IteratorChain.java:239) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.FilterIterator.setNextObject(FilterIterator.java:174) > at > org.apache.commons.collections4.iterators.FilterIterator.hasNext(FilterIterator.java:86) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.IteratorChain.hasNext(IteratorChain.java:239) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.FilterIterator.setNextObject(FilterIterator.java:174) > at > org.apache.commons.collections4.iterators.FilterIterator.hasNext(FilterIterator.java:86) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.IteratorChain.hasNext(IteratorChain.java:239) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.FilterIterator.setNextObject(FilterIterator.java:174) > at > org.apache.commons.collections4.iterators.FilterIterator.hasNext(FilterIterator.java:86) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.IteratorChain.hasNext(IteratorChain.java:239) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.FilterIterator.setNextObject(FilterIterator.java:174) > at > org.apache.commons.collections4.iterators.FilterIterator.hasNext(FilterIterator.java:86) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.IteratorChain.updateCurrentIterator(IteratorChain.java:222) > at > org.apache.commons.collections4.iterators.IteratorChain.hasNext(IteratorChain.java:236) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.FilterIterator.setNextObject(FilterIterator.java:174) > at > org.apache.commons.collections4.iterators.FilterIterator.hasNext(FilterIterator.java:86) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.IteratorChain.hasNext(IteratorChain.java:239) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.FilterIterator.setNextObject(FilterIterator.java:174) > at > org.apache.commons.collections4.iterators.FilterIterator.hasNext(FilterIterator.java:86) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.IteratorChain.updateCurrentIterator(IteratorChain.java:222) > at > org.apache.commons.collections4.iterators.IteratorChain.hasNext(IteratorChain.java:236) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.FilterIterator.setNextObject(FilterIterator.java:174) > at > org.apache.commons.collections4.iterators.FilterIterator.hasNext(FilterIterator.java:86) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.IteratorChain.hasNext(IteratorChain.java:239) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.FilterIterator.setNextObject(FilterIterator.java:174) > at > org.apache.commons.collections4.iterators.FilterIterator.hasNext(FilterIterator.java:86) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.IteratorChain.hasNext(IteratorChain.java:239) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.FilterIterator.setNextObject(FilterIterator.java:174) > at > org.apache.commons.collections4.iterators.FilterIterator.hasNext(FilterIterator.java:86) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.IteratorChain.hasNext(IteratorChain.java:239) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.FilterIterator.setNextObject(FilterIterator.java:174) > at > org.apache.commons.collections4.iterators.FilterIterator.hasNext(FilterIterator.java:86) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.IteratorChain.updateCurrentIterator(IteratorChain.java:222) > at > org.apache.commons.collections4.iterators.IteratorChain.hasNext(IteratorChain.java:236) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.FilterIterator.setNextObject(FilterIterator.java:174) > at > org.apache.commons.collections4.iterators.FilterIterator.hasNext(FilterIterator.java:86) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.IteratorChain.updateCurrentIterator(IteratorChain.java:222) > at > org.apache.commons.collections4.iterators.IteratorChain.hasNext(IteratorChain.java:236) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.FilterIterator.setNextObject(FilterIterator.java:174) > at > org.apache.commons.collections4.iterators.FilterIterator.hasNext(FilterIterator.java:86) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.IteratorChain.hasNext(IteratorChain.java:239) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.FilterIterator.setNextObject(FilterIterator.java:174) > at > org.apache.commons.collections4.iterators.FilterIterator.hasNext(FilterIterator.java:86) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.IteratorChain.updateCurrentIterator(IteratorChain.java:222) > at > org.apache.commons.collections4.iterators.IteratorChain.hasNext(IteratorChain.java:236) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.FilterIterator.setNextObject(FilterIterator.java:174) > at > org.apache.commons.collections4.iterators.FilterIterator.hasNext(FilterIterator.java:86) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.IteratorChain.updateCurrentIterator(IteratorChain.java:222) > at > org.apache.commons.collections4.iterators.IteratorChain.hasNext(IteratorChain.java:236) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.FilterIterator.setNextObject(FilterIterator.java:174) > at > org.apache.commons.collections4.iterators.FilterIterator.hasNext(FilterIterator.java:86) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.IteratorChain.updateCurrentIterator(IteratorChain.java:222) > at > org.apache.commons.collections4.iterators.IteratorChain.hasNext(IteratorChain.java:236) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.FilterIterator.setNextObject(FilterIterator.java:174) > at > org.apache.commons.collections4.iterators.FilterIterator.hasNext(FilterIterator.java:86) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.IteratorChain.updateCurrentIterator(IteratorChain.java:222) > at > org.apache.commons.collections4.iterators.IteratorChain.hasNext(IteratorChain.java:236) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.FilterIterator.setNextObject(FilterIterator.java:174) > at > org.apache.commons.collections4.iterators.FilterIterator.hasNext(FilterIterator.java:86) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.IteratorChain.hasNext(IteratorChain.java:239) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.FilterIterator.setNextObject(FilterIterator.java:174) > at > org.apache.commons.collections4.iterators.FilterIterator.hasNext(FilterIterator.java:86) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.IteratorChain.updateCurrentIterator(IteratorChain.java:222) > at > org.apache.commons.collections4.iterators.IteratorChain.hasNext(IteratorChain.java:236) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.FilterIterator.setNextObject(FilterIterator.java:174) > at > org.apache.commons.collections4.iterators.FilterIterator.hasNext(FilterIterator.java:86) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.IteratorChain.hasNext(IteratorChain.java:239) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.FilterIterator.setNextObject(FilterIterator.java:174) > at > org.apache.commons.collections4.iterators.FilterIterator.hasNext(FilterIterator.java:86) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.IteratorChain.updateCurrentIterator(IteratorChain.java:222) > at > org.apache.commons.collections4.iterators.IteratorChain.hasNext(IteratorChain.java:236) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.FilterIterator.setNextObject(FilterIterator.java:174) > at > org.apache.commons.collections4.iterators.FilterIterator.hasNext(FilterIterator.java:86) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.IteratorChain.updateCurrentIterator(IteratorChain.java:222) > at > org.apache.commons.collections4.iterators.IteratorChain.hasNext(IteratorChain.java:236) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.FilterIterator.setNextObject(FilterIterator.java:174) > at > org.apache.commons.collections4.iterators.FilterIterator.hasNext(FilterIterator.java:86) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.IteratorChain.hasNext(IteratorChain.java:239) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.FilterIterator.setNextObject(FilterIterator.java:174) > at > org.apache.commons.collections4.iterators.FilterIterator.hasNext(FilterIterator.java:86) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.IteratorChain.hasNext(IteratorChain.java:239) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.FilterIterator.setNextObject(FilterIterator.java:174) > at > org.apache.commons.collections4.iterators.FilterIterator.hasNext(FilterIterator.java:86) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.IteratorChain.updateCurrentIterator(IteratorChain.java:222) > at > org.apache.commons.collections4.iterators.IteratorChain.hasNext(IteratorChain.java:236) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.FilterIterator.setNextObject(FilterIterator.java:174) > at > org.apache.commons.collections4.iterators.FilterIterator.hasNext(FilterIterator.java:86) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.IteratorChain.hasNext(IteratorChain.java:239) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.FilterIterator.setNextObject(FilterIterator.java:174) > at > org.apache.commons.collections4.iterators.FilterIterator.hasNext(FilterIterator.java:86) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.IteratorChain.hasNext(IteratorChain.java:239) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.FilterIterator.setNextObject(FilterIterator.java:174) > at > org.apache.commons.collections4.iterators.FilterIterator.hasNext(FilterIterator.java:86) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.IteratorChain.updateCurrentIterator(IteratorChain.java:222) > at > org.apache.commons.collections4.iterators.IteratorChain.hasNext(IteratorChain.java:236) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.FilterIterator.setNextObject(FilterIterator.java:174) > at > org.apache.commons.collections4.iterators.FilterIterator.hasNext(FilterIterator.java:86) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at > org.apache.commons.collections4.iterators.IteratorChain.updateCurrentIterator(IteratorChain.java:222) > at > org.apache.commons.collections4.iterators.IteratorChain.hasNext(IteratorChain.java:236) > at > org.apache.commons.collections4.iterators.UnmodifiableIterator.hasNext(UnmodifiableIterator.java:73) > at java.lang.Iterable.forEach(java.base@17.0.2/Iterable.java:74) > at Test1.main(CollectionFunctionsTest.java:107) -- This message was sent by Atlassian Jira (v8.20.10#820010)