[jira] [Created] (CASSANDRA-15924) Avoid emitting empty range tombstones from RangeTombstoneList

["Marcus Eriksson (Jira)" <ji...@apache.org>]

Marcus Eriksson created CASSANDRA-15924:
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             Summary: Avoid emitting empty range tombstones from RangeTombstoneList
                 Key: CASSANDRA-15924
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-15924
             Project: Cassandra
          Issue Type: Bug
            Reporter: Marcus Eriksson
            Assignee: Marcus Eriksson


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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