[jira] [Created] (CASSANDRA-5900) Setting bloom filter fp chance to 1.0 causes ClassCastExceptions

["J.B. Langston (JIRA)" <ji...@apache.org>]

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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