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使用 Cassandra 1.1.6、Pig 0.10.0 和 Hadoop 1.1.0，我可以成功运行 examples/pig 中 cassandra 提供的 pig_cassandra 示例脚本。

但是当我改变

rows = LOAD 'cassandra://PigTest/SomeApp' USING CassandraStorage();

至：

rows = LOAD 'cassandra://PigTest/SomeApp?widerows=true' USING CassandraStorage();

我收到以下错误：

java.lang.IndexOutOfBoundsException: Index: 8, Size: 2
    at java.util.ArrayList.rangeCheck(ArrayList.java:604)
    at java.util.ArrayList.get(ArrayList.java:382)
    at org.apache.pig.data.DefaultTuple.get(DefaultTuple.java:156)
    at org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.POProject.processInputBag(POProject.java:579)
    at org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.POProject.getNext(POProject.java:248)
    at org.apache.pig.backend.hadoop.executionengine.physicalLayer.PhysicalOperator.getNext(PhysicalOperator.java:316)
    at org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POForEach.processPlan(POForEach.java:332)
    at org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POForEach.getNext(POForEach.java:284)
    at org.apache.pig.backend.hadoop.executionengine.physicalLayer.PhysicalOperator.processInput(PhysicalOperator.java:290)
    at org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POForEach.getNext(POForEach.java:233)
    at org.apache.pig.backend.hadoop.executionengine.physicalLayer.PhysicalOperator.processInput(PhysicalOperator.java:290)
    at org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POPreCombinerLocalRearrange.getNext(POPreCombinerLocalRearrange.java:126)
    at org.apache.pig.backend.hadoop.executionengine.physicalLayer.PhysicalOperator.processInput(PhysicalOperator.java:290)
    at org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POForEach.getNext(POForEach.java:233)
    at org.apache.pig.backend.hadoop.executionengine.physicalLayer.PhysicalOperator.processInput(PhysicalOperator.java:290)
    at org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POLocalRearrange.getNext(POLocalRearrange.java:256)
    at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigGenericMapBase.runPipeline(PigGenericMapBase.java:271)
    at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigGenericMapBase.map(PigGenericMapBase.java:266)
    at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigGenericMapBase.map(PigGenericMapBase.java:64)
    at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:144)
    at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:764)
    at org.apache.hadoop.mapred.MapTask.run(MapTask.java:370)                                                                                                                                                                                                                                                                                                           
    at org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:212)

在本地和 mapreduce 模式下运行时，或者如果我设置 PIG_WIDEROW_INPUT=true，就会发生这种情况。

以下 Pig Latin 脚本将因“widerows=true”参数而失败。

rows = LOAD 'cassandra://PigTest/SomeApp?widerows=true' USING CassandraStorage();
cols = FOREACH rows GENERATE flatten(columns.name);
DUMP cols;

我似乎无法超越这一点，在使用宽行输入时不读取 SomeApp 列族中的静态列。其他列族也存在同样的问题。

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1 回答 1

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我有一个类似的问题。这可能是因为 get_paged_slices 中的错误已在以后的 1.1.x 版本中修复。解决方案是将 Cassandra 升级到1.1.8 1.1.9

看：

于 2012-12-31T20:39:15.193 回答