Saranya Krishnakumar created CASSANDRA-21723:
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Summary: Wrap-around shard silently skipped during coordinated
SSTable import for mutation tracking enabled tables
Key: CASSANDRA-21723
URL: https://issues.apache.org/jira/browse/CASSANDRA-21723
Project: Apache Cassandra
Issue Type: Bug
Reporter: Saranya Krishnakumar
TrackedImportTransfers.create() creates shards for streaming during SSTable
import for tracked tables. For the wrap around shard, with min>max,
IntervalTree.search silently returns an empty list of SSTables. As a result, no
TrackedImportTransfer is created for that shard, and a SELECT query after
successful import returns partial data. Fix needed is to create the interval
with Interval tree's actual maximum bound when right < left endpoint, so that
the wrap-around shard's data is transferred.
For a 3 node cluster with tokens, -5534023222112865485, -1844674407370955163
and 1844674407370955159
Shards from system.shards are:
-9223372036854775808,-5534023222112865485
-5534023222112865485,-1844674407370955163
-1844674407370955163,1844674407370955159
1844674407370955159, -9223372036854775808
>From import logs for node 1, only 3 shards are transferred,
INFO [node1_LocalTrackedTransfers:2] 2026-09-24 15:30:09,543
TrackedImportTransfer.java:375 - [TrackedImportTransfer #MutationId\{1, 1, 18,
1790289009}] Starting streaming transfer
TrackedImportTransfer{keyspace='sstable_import_tracked',
range=(-9223372036854775808,-5534023222112865485]
INFO [node1_LocalTrackedTransfers:2] 2026-09-24 15:30:09,704
TrackedImportTransfer.java:375 - [TrackedImportTransfer #MutationId\{1, 3, 26,
1790289009}] Starting streaming transfer
TrackedImportTransfer{keyspace='sstable_import_tracked',
range=(-5534023222112865485,-1844674407370955163]
INFO [node1_LocalTrackedTransfers:2] 2026-09-24 15:30:09,814
TrackedImportTransfer.java:375 - [TrackedImportTransfer #MutationId\{1, 4, 16,
1790289009}] Starting streaming transfer
TrackedImportTransfer{keyspace='sstable_import_tracked',
range=(-1844674407370955163,1844674407370955159]
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