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https://issues.apache.org/jira/browse/CASSANDRA-16084?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Marcus Eriksson updated CASSANDRA-16084:
----------------------------------------
          Fix Version/s: 4.0-beta3
          Since Version: 4.0-alpha1
    Source Control Link: 
https://github.com/apache/cassandra/commit/9b6e54ee02dc68a99965f1ea9533fd5e781e4cbe
             Resolution: Fixed
                 Status: Resolved  (was: Ready to Commit)

and committed, thanks

> Avoid trying to keep track of RTs for endpoints we won't write to during read 
> repair
> ------------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-16084
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-16084
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Consistency/Coordination
>            Reporter: Marcus Eriksson
>            Assignee: Marcus Eriksson
>            Priority: Normal
>             Fix For: 4.0-beta3
>
>
> During range movements we can have responses for endpoints we won't write to, 
> in this case we don't collect {{PartitionUpdate}}s for those endpoints, but 
> we do try to update the range tombstones. This causes us to fail with this 
> assertion error since we assume a partition deletion to be LIVE if there is 
> no current partition update getting built for an endpoint.
> {code}
> Caused by: java.lang.AssertionError: Error merging RTs on 
> distributed_test_keyspace.tbl: merged=null, versions=[null, Marker 
> INCL_START_BOUND(20)@80/1598882605, Marker 
> INCL_START_BOUND(20)@80/1598882605], 
> sources={[Full(/127.0.0.3:7012,(-3,4611686018427387899]), 
> Full(/127.0.0.1:7012,(-3,4611686018427387899]), 
> Full(/127.0.0.2:7012,(-3,4611686018427387899])]}, debug info:
>  /127.0.0.3:7012 => [distributed_test_keyspace.tbl] key=test1 
> partition_deletion=deletedAt=100, localDeletion=1598882605 columns=[[] | []] 
> repaired_digest= repaired_digest_conclusive==true,
> /127.0.0.1:7012 => [distributed_test_keyspace.tbl] key=test1 
> partition_deletion=deletedAt=50, localDeletion=1598882605 columns=[[] | []] 
> repaired_digest= repaired_digest_conclusive==true
>     Marker INCL_START_BOUND(20)@80/1598882605
>     Marker INCL_END_BOUND(40)@80/1598882605,
> /127.0.0.2:7012 => [distributed_test_keyspace.tbl] key=test1 
> partition_deletion=deletedAt=50, localDeletion=1598882605 columns=[[] | []] 
> repaired_digest= repaired_digest_conclusive==true
>     Marker INCL_START_BOUND(20)@80/1598882605
>     Marker INCL_END_BOUND(40)@80/1598882605
>       at 
> org.apache.cassandra.service.reads.DataResolver$2$1.onMergedRangeTombstoneMarkers(DataResolver.java:384)
>       at 
> org.apache.cassandra.db.rows.UnfilteredRowIterators$UnfilteredRowMergeIterator$MergeReducer.getReduced(UnfilteredRowIterators.java:592)
>       at 
> org.apache.cassandra.db.rows.UnfilteredRowIterators$UnfilteredRowMergeIterator$MergeReducer.getReduced(UnfilteredRowIterators.java:541)
>       at 
> org.apache.cassandra.utils.MergeIterator$ManyToOne.consume(MergeIterator.java:219)
>       at 
> org.apache.cassandra.utils.MergeIterator$ManyToOne.computeNext(MergeIterator.java:158)
>       at 
> org.apache.cassandra.utils.AbstractIterator.hasNext(AbstractIterator.java:47)
>       at 
> org.apache.cassandra.db.rows.UnfilteredRowIterators$UnfilteredRowMergeIterator.computeNext(UnfilteredRowIterators.java:523)
>       at 
> org.apache.cassandra.db.rows.UnfilteredRowIterators$UnfilteredRowMergeIterator.computeNext(UnfilteredRowIterators.java:391)
>       at 
> org.apache.cassandra.utils.AbstractIterator.hasNext(AbstractIterator.java:47)
>       at org.apache.cassandra.db.transform.BaseRows.hasNext(BaseRows.java:133)
>       at 
> org.apache.cassandra.db.transform.FilteredRows.isEmpty(FilteredRows.java:50)
>       at 
> org.apache.cassandra.db.transform.EmptyPartitionsDiscarder.applyToPartition(EmptyPartitionsDiscarder.java:27)
>       at 
> org.apache.cassandra.db.transform.BasePartitions.hasNext(BasePartitions.java:97)
>       at 
> org.apache.cassandra.service.StorageProxy$6.hasNext(StorageProxy.java:1768)
>       at 
> org.apache.cassandra.cql3.statements.SelectStatement.process(SelectStatement.java:777)
>       at 
> org.apache.cassandra.cql3.statements.SelectStatement.processResults(SelectStatement.java:425)
>       at 
> org.apache.cassandra.cql3.statements.SelectStatement.execute(SelectStatement.java:296)
>       at 
> org.apache.cassandra.cql3.statements.SelectStatement.execute(SelectStatement.java:246)
>       at 
> org.apache.cassandra.cql3.statements.SelectStatement.execute(SelectStatement.java:88)
>       at 
> org.apache.cassandra.distributed.impl.Coordinator.executeInternal(Coordinator.java:100)
>       at 
> org.apache.cassandra.distributed.impl.Coordinator.lambda$executeWithResult$0(Coordinator.java:62)
>       at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>       at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
>       at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
>       at 
> io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
>       at java.lang.Thread.run(Thread.java:745)
> Caused by: java.lang.AssertionError: currentDeletion=deletedAt=100, 
> localDeletion=1598882605, marker=Marker INCL_START_BOUND(20)@80/1598882605
>       at 
> org.apache.cassandra.service.reads.repair.RowIteratorMergeListener.onMergedRangeTombstoneMarkers(RowIteratorMergeListener.java:296)
>       at 
> org.apache.cassandra.service.reads.DataResolver$2$1.onMergedRangeTombstoneMarkers(DataResolver.java:370)
>       ... 25 more
> {code}



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