J.B. Langston created CASSANDRA-5900:
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Summary: Setting bloom filter fp chance to 1.0 causes
ClassCastExceptions
Key: CASSANDRA-5900
URL: https://issues.apache.org/jira/browse/CASSANDRA-5900
Project: Cassandra
Issue Type: Bug
Components: Core
Reporter: J.B. Langston
In 1.2, we introduced the ability to turn SSTables off completely by setting fp
chance to 1.0. It looks like there is a bug with this though. When it's set to
one the following errors occur because AlwaysPresentFilter is not present in
the switch statement here at
https://github.com/apache/cassandra/blob/cassandra-1.2/src/java/org/apache/cassandra/utils/FilterFactory.java#L91,
and we default to Murmur3BloomFilter for an unknown type.
Exception in thread "main" java.lang.ClassCastException:
org.apache.cassandra.utils.AlwaysPresentFilter cannot be cast to
org.apache.cassandra.utils.Murmur3BloomFilter
at
org.apache.cassandra.utils.FilterFactory.serializedSize(FilterFactory.java:91)
at
org.apache.cassandra.io.sstable.SSTableReader.getBloomFilterSerializedSize(SSTableReader.java:531)
at
org.apache.cassandra.metrics.ColumnFamilyMetrics$15.value(ColumnFamilyMetrics.java:273)
at
org.apache.cassandra.metrics.ColumnFamilyMetrics$15.value(ColumnFamilyMetrics.java:268)
at
org.apache.cassandra.db.ColumnFamilyStore.getBloomFilterDiskSpaceUsed(ColumnFamilyStore.java:1825)
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