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  1. Cassandra
  2. CASSANDRA-6892

Cassandra 2.0.x validates Thrift columns incorrectly and causes InvalidRequestException



    • Type: Bug
    • Status: Resolved
    • Priority: Low
    • Resolution: Fixed
    • Fix Version/s: 2.0.7
    • Component/s: Legacy/CQL
    • Labels:
    • Severity:


      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:

      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

      The schema of my column family is:

      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;

      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:

          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;


        1. 6892-2.0-v2.txt
          46 kB
          Sylvain Lebresne
        2. 6892-2.0.txt
          23 kB
          Tom Hobbs
        3. CASSANDRA-6892_V1.patch
          0.9 kB
          Christian Spriegel



            • Assignee:
              slebresne Sylvain Lebresne
              christianmovi Christian Spriegel
              Sylvain Lebresne
              Tom Hobbs
            • Votes:
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              • Created: