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https://issues.apache.org/jira/browse/CASSANDRA-6892?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13943544#comment-13943544
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Tyler Hobbs commented on CASSANDRA-6892:
----------------------------------------
After investigating this a bit with Christian, it turns out the column that was
failing the insert was named "key2", which was one of the key aliases. I
didn't think that key aliases were supposed to affect validation of Thrift
columns, but after looking at some tickets and code, it seems like that may be
intentional. Can anybody confirm that?
> Cassandra 2.0.x validates Thrift columns incorrectly and causes
> InvalidRequestException
> ---------------------------------------------------------------------------------------
>
> Key: CASSANDRA-6892
> URL: https://issues.apache.org/jira/browse/CASSANDRA-6892
> Project: Cassandra
> Issue Type: Bug
> Components: API
> Reporter: Christian Spriegel
> Assignee: Tyler Hobbs
> Priority: Minor
> Fix For: 2.0.7
>
> Attachments: CASSANDRA-6892_V1.patch
>
>
> I just upgrade my local dev machine to Cassandra 2.0, which causes one of my
> automated tests to fail now. With the latest 1.2.x it was working fine.
> The Exception I get on my client (using Hector) is:
> {code}
> me.prettyprint.hector.api.exceptions.HInvalidRequestException:
> InvalidRequestException(why:(Expected 8 or 0 byte long (21))
> [MDS_0][MasterdataIndex][key2] failed validation)
> at
> me.prettyprint.cassandra.service.ExceptionsTranslatorImpl.translate(ExceptionsTranslatorImpl.java:52)
> at
> me.prettyprint.cassandra.connection.HConnectionManager.operateWithFailover(HConnectionManager.java:265)
> at
> me.prettyprint.cassandra.model.ExecutingKeyspace.doExecuteOperation(ExecutingKeyspace.java:113)
> at
> me.prettyprint.cassandra.model.MutatorImpl.execute(MutatorImpl.java:243)
> at
> me.prettyprint.cassandra.service.template.AbstractColumnFamilyTemplate.executeBatch(AbstractColumnFamilyTemplate.java:115)
> at
> me.prettyprint.cassandra.service.template.AbstractColumnFamilyTemplate.executeIfNotBatched(AbstractColumnFamilyTemplate.java:163)
> at
> me.prettyprint.cassandra.service.template.ColumnFamilyTemplate.update(ColumnFamilyTemplate.java:69)
> at
> com.mycompany.spring3utils.dataaccess.cassandra.AbstractCassandraDAO.doUpdate(AbstractCassandraDAO.java:482)
> ....
> Caused by: InvalidRequestException(why:(Expected 8 or 0 byte long (21))
> [MDS_0][MasterdataIndex][key2] failed validation)
> at
> org.apache.cassandra.thrift.Cassandra$batch_mutate_result.read(Cassandra.java:20833)
> at org.apache.thrift.TServiceClient.receiveBase(TServiceClient.java:78)
> at
> org.apache.cassandra.thrift.Cassandra$Client.recv_batch_mutate(Cassandra.java:964)
> at
> org.apache.cassandra.thrift.Cassandra$Client.batch_mutate(Cassandra.java:950)
> at
> me.prettyprint.cassandra.model.MutatorImpl$3.execute(MutatorImpl.java:246)
> at
> me.prettyprint.cassandra.model.MutatorImpl$3.execute(MutatorImpl.java:1)
> at
> me.prettyprint.cassandra.service.Operation.executeAndSetResult(Operation.java:104)
> at
> me.prettyprint.cassandra.connection.HConnectionManager.operateWithFailover(HConnectionManager.java:258)
> ... 46 more
> {code}
> The schema of my column family is:
> {code}
> create column family MasterdataIndex with
> compression_options = {sstable_compression:SnappyCompressor,
> chunk_length_kb:64} and
> comparator = UTF8Type and
> key_validation_class = 'CompositeType(UTF8Type,LongType)' and
> default_validation_class = BytesType;
> {code}
> From the error message it looks like Cassandra is trying to validate the
> value with the key-validator! (My value in this case it 21 bytes long)
> I studied the Cassandra 2.0 code and found something wrong. It seems in
> CFMetaData.addDefaultKeyAliases it passes the KeyValidator into
> ColumnDefinition.partitionKeyDef. Inside ColumnDefinition the validator is
> expected to be the value validator!
> In CFMetaData:
> {code}
> private List<ColumnDefinition>
> addDefaultKeyAliases(List<ColumnDefinition> pkCols)
> {
> for (int i = 0; i < pkCols.size(); i++)
> {
> if (pkCols.get(i) == null)
> {
> Integer idx = null;
> AbstractType<?> type = keyValidator;
> if (keyValidator instanceof CompositeType)
> {
> idx = i;
> type = ((CompositeType)keyValidator).types.get(i);
> }
> // For compatibility sake, we call the first alias 'key'
> rather than 'key1'. This
> // is inconsistent with column alias, but it's probably not
> worth risking breaking compatibility now.
> ByteBuffer name = ByteBufferUtil.bytes(i == 0 ?
> DEFAULT_KEY_ALIAS : DEFAULT_KEY_ALIAS + (i + 1));
> ColumnDefinition newDef =
> ColumnDefinition.partitionKeyDef(name, type, idx); // type is LongType in my
> case, as it uses keyValidator !!!
> column_metadata.put(newDef.name, newDef);
> pkCols.set(i, newDef);
> }
> }
> return pkCols;
> }
> ...
> public AbstractType<?> getValidator() // in ThriftValidation this is
> expected to be the value validator!
> {
> return validator;
> }
> {code}
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