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https://issues.apache.org/jira/browse/CASSANDRA-15924?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17154556#comment-17154556
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Alex Petrov commented on CASSANDRA-15924:
-----------------------------------------
+1 as well. Thank you for the patch!
> Avoid emitting empty range tombstones from RangeTombstoneList
> -------------------------------------------------------------
>
> Key: CASSANDRA-15924
> URL: https://issues.apache.org/jira/browse/CASSANDRA-15924
> Project: Cassandra
> Issue Type: Bug
> Components: Consistency/Coordination
> Reporter: Marcus Eriksson
> Assignee: Marcus Eriksson
> Priority: Normal
> Fix For: 3.0.x, 3.11.x, 4.x
>
>
> In {{RangeTombstoneList#iterator}} there is a chance we emit empty range
> tombstones depending on the slice passed in. This can happen during read
> repair with either an empty slice or with paging and the final page being
> empty.
> This creates problems in RTL if we try to insert a new range tombstone which
> covers the empty ones;
> {code}
> Caused by: java.lang.AssertionError
> at
> org.apache.cassandra.db.RangeTombstoneList.insertFrom(RangeTombstoneList.java:541)
> at
> org.apache.cassandra.db.RangeTombstoneList.addAll(RangeTombstoneList.java:217)
> at
> org.apache.cassandra.db.MutableDeletionInfo.add(MutableDeletionInfo.java:141)
> at
> org.apache.cassandra.db.partitions.AtomicBTreePartition.addAllWithSizeDelta(AtomicBTreePartition.java:137)
> at org.apache.cassandra.db.Memtable.put(Memtable.java:254)
> at
> org.apache.cassandra.db.ColumnFamilyStore.apply(ColumnFamilyStore.java:1210)
> at org.apache.cassandra.db.Keyspace.applyInternal(Keyspace.java:573)
> at org.apache.cassandra.db.Keyspace.apply(Keyspace.java:421)
> at org.apache.cassandra.db.Mutation.apply(Mutation.java:210)
> at org.apache.cassandra.db.Mutation.apply(Mutation.java:215)
> at org.apache.cassandra.db.Mutation.apply(Mutation.java:224)
> at
> org.apache.cassandra.cql3.statements.ModificationStatement.executeInternalWithoutCondition(ModificationStatement.java:582)
> at
> org.apache.cassandra.cql3.statements.ModificationStatement.executeInternal(ModificationStatement.java:572)
> {code}
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