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https://issues.apache.org/jira/browse/CASSANDRA-5900?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jonathan Ellis updated CASSANDRA-5900:
--------------------------------------
Attachment: 5900.txt
Patch attached.
Note that this only affects "nodetool cfstats" as well as calling the affected
method directly; no internal code calls this method.
> 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
> Attachments: 5900.txt
>
>
> In 1.2, we introduced the ability to turn bloom filters off completely by
> setting fp chance to 1.0. It looks like there is a bug with this though.
> When it's set to 1.0 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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