Jacek Lewandowski created CASSANDRA-18013:
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Summary: Splitter sometimes creates different number of splits
than requested
Key: CASSANDRA-18013
URL: https://issues.apache.org/jira/browse/CASSANDRA-18013
Project: Cassandra
Issue Type: Bug
Components: Local/Compaction
Reporter: Jacek Lewandowski
Assignee: Jacek Lewandowski
{{Splitter}} in some cases may produce one split more than requested. When it
happens, it fails with assertion error when assertions are enabled.
Test to reproduce the issue:
{code:java}
Splitter splitter = getSplitter(Murmur3Partitioner.instance);
long lt = 0;
long rt = 31;
Range<Token> range = new
Range<>(getWrappedToken(Murmur3Partitioner.instance, BigInteger.valueOf(lt)),
getWrappedToken(Murmur3Partitioner.instance, BigInteger.valueOf(rt)));
for (int i = 1; i <= (rt - lt); i++)
{
List<Token> splits = splitter.splitOwnedRanges(i, Arrays.asList(new
Splitter.WeightedRange(1.0d, range)), false);
logger.info("{} splits of {} are: {}", i, range, splits);
Assertions.assertThat(splits).hasSize(i);
}
{code}
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