cassandra hive插入null例外

試圖使用配置單元通過DSE 3.1.3將數據導入Cassandra。看來插入一個NULL值不是通過配置單元支持的。這是否支持？cassandra hive插入null例外

人爲的例子：

cqlsh: 
create table foo(id text, name text, primary key(id)); 
create table fooo(id text, name text, primary key(id)); 

insert into foo(id,name) values('a',null); 

hive: (use keyspace where foo and fooo were created) 
insert into table fooo select id,null from foo; 

Stack from jobtracker... 

java.lang.RuntimeException: org.apache.hadoop.hive.ql.metadata.HiveException: Hive Runtime Error while processing row {"id":"a","name":""} 
    at org.apache.hadoop.hive.ql.exec.ExecMapper.map(ExecMapper.java:161) 
    at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:50) 
    at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:436) 
    at org.apache.hadoop.mapred.MapTask.run(MapTask.java:372) 
    at org.apache.hadoop.mapred.Child$4.run(Child.java:266) 
    at java.security.AccessController.doPrivileged(Native Method) 
    at javax.security.auth.Subject.doAs(Subject.java:396) 
    at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1121) 
    at org.apache.hadoop.mapred.Child.main(Child.java:260) 
Caused by: org.apache.hadoop.hive.ql.metadata.HiveException: Hive Runtime Error while processing row {"id":"a","name":""} 
    at org.apache.hadoop.hive.ql.exec.MapOperator.process(MapOperator.java:548) 
    at org.apache.hadoop.hive.ql.exec.ExecMapper.map(ExecMapper.java:143) 
    ... 8 more 
Caused by: java.lang.NullPointerException 
    at org.apache.hadoop.hive.serde2.lazy.LazyUtils.writePrimitiveUTF8(LazyUtils.java:220) 
    at org.apache.hadoop.hive.cassandra.serde.AbstractTableMapping.serialize(AbstractTableMapping.java:149) 
    at org.apache.hadoop.hive.cassandra.serde.AbstractTableMapping.serializeToBytes(AbstractTableMapping.java:118) 
    at org.apache.hadoop.hive.cassandra.cql3.serde.CqlTableMapping.getWritable(CqlTableMapping.java:53) 
    at org.apache.hadoop.hive.cassandra.serde.AbstractColumnSerDe.serialize(AbstractColumnSerDe.java:150)

來源

2013-09-23 kavika

剛剛遇到這個問題我自己，雖然沒有明確的空值。我認爲DSE 3.1.2-3中的Hive CQL3 SERDE存在一個潛在問題。 – Aaronontheweb