Details

    • Type: Bug
    • Status: Resolved
    • Priority: Low
    • Resolution: Fixed
    • Fix Version/s: 3.11.0
    • Component/s: Legacy/CQL
    • Labels:
      None
    • Severity:
      Low

      Description

      When creating the following user defined AGGREGATION and FUNCTION:

      init.cql
      CREATE FUNCTION state_group_and_total(state map<uuid, int>, type uuid)
          RETURNS NULL ON NULL INPUT
          RETURNS map<uuid, int>
          LANGUAGE java AS '
              Integer count = (Integer) state.get(type);
      
              count = (count == null ? 1 : count + 1);
              state.put(type, count);
      
              return state;
          ';
      
      CREATE OR REPLACE AGGREGATE group_and_total(uuid)
          SFUNC state_group_and_total
          STYPE map<uuid, int>
          INITCOND {};
      

      And creating a statement like:

      SELECT group_and_total("id") FROM mytable;
      

      When mytable is empty, it throws the following null assertion

      ERROR [Native-Transport-Requests-1] 2017-04-03 07:25:09,787 Message.java:623 - Unexpected exception during request; channel = [id: 0xd7d9159b, L:/172.19.0.2:9042 - R:/172.19.0.3:43444]
      java.lang.AssertionError: null
              at org.apache.cassandra.cql3.functions.UDAggregate$2.compute(UDAggregate.java:189) ~[apache-cassandra-3.10.jar:3.10]
              at org.apache.cassandra.cql3.selection.AggregateFunctionSelector.getOutput(AggregateFunctionSelector.java:53) ~[apache-cassandra-3.10.jar:3.10]
              at org.apache.cassandra.cql3.selection.Selection$SelectionWithProcessing$1.getOutputRow(Selection.java:592) ~[apache-cassandra-3.10.jar:3.10]
              at org.apache.cassandra.cql3.selection.Selection$ResultSetBuilder.getOutputRow(Selection.java:430) ~[apache-cassandra-3.10.jar:3.10]
              at org.apache.cassandra.cql3.selection.Selection$ResultSetBuilder.build(Selection.java:424) ~[apache-cassandra-3.10.jar:3.10]
              at org.apache.cassandra.cql3.statements.SelectStatement.process(SelectStatement.java:763) ~[apache-cassandra-3.10.jar:3.10]
              at org.apache.cassandra.cql3.statements.SelectStatement.processResults(SelectStatement.java:400) ~[apache-cassandra-3.10.jar:3.10]
              at org.apache.cassandra.cql3.statements.SelectStatement.execute(SelectStatement.java:378) ~[apache-cassandra-3.10.jar:3.10]
              at org.apache.cassandra.cql3.statements.SelectStatement.execute(SelectStatement.java:251) ~[apache-cassandra-3.10.jar:3.10]
              at org.apache.cassandra.cql3.statements.SelectStatement.execute(SelectStatement.java:79) ~[apache-cassandra-3.10.jar:3.10]
              at org.apache.cassandra.cql3.QueryProcessor.processStatement(QueryProcessor.java:217) ~[apache-cassandra-3.10.jar:3.10]
              at org.apache.cassandra.cql3.QueryProcessor.process(QueryProcessor.java:248) ~[apache-cassandra-3.10.jar:3.10]
              at org.apache.cassandra.cql3.QueryProcessor.process(QueryProcessor.java:233) ~[apache-cassandra-3.10.jar:3.10]
              at org.apache.cassandra.transport.messages.QueryMessage.execute(QueryMessage.java:116) ~[apache-cassandra-3.10.jar:3.10]
              at org.apache.cassandra.transport.Message$Dispatcher.channelRead0(Message.java:517) [apache-cassandra-3.10.jar:3.10]
              at org.apache.cassandra.transport.Message$Dispatcher.channelRead0(Message.java:410) [apache-cassandra-3.10.jar:3.10]
              at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:105) [netty-all-4.0.39.Final.jar:4.0.39.Final]
              at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:366) [netty-all-4.0.39.Final.jar:4.0.39.Final]
              at io.netty.channel.AbstractChannelHandlerContext.access$600(AbstractChannelHandlerContext.java:35) [netty-all-4.0.39.Final.jar:4.0.39.Final]
              at io.netty.channel.AbstractChannelHandlerContext$7.run(AbstractChannelHandlerContext.java:357) [netty-all-4.0.39.Final.jar:4.0.39.Final]
              at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [na:1.8.0_121]
              at org.apache.cassandra.concurrent.AbstractLocalAwareExecutorService$FutureTask.run(AbstractLocalAwareExecutorService.java:162) [apache-cassandra-3.10.jar:3.10]
              at org.apache.cassandra.concurrent.SEPWorker.run(SEPWorker.java:109) [apache-cassandra-3.10.jar:3.10]
              at java.lang.Thread.run(Thread.java:745) [na:1.8.0_121]
      
      

      Even if my FUNCTION only returns state, it creates that assertion null.

      Thank you in advance.

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              • Assignee:
                snazy Robert Stupp
                Reporter:
                PAF PAF
                Authors:
                Robert Stupp
                Reviewers:
                Benjamin Lerer
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                • Created:
                  Updated:
                  Resolved: