fuggy_yama created CASSANDRA-9773:
-------------------------------------
Summary: Hadoop Cassandra integration - cannot output to table
with only primary key columns
Key: CASSANDRA-9773
URL: https://issues.apache.org/jira/browse/CASSANDRA-9773
Project: Cassandra
Issue Type: Bug
Components: Hadoop
Environment: Cassandra 2.0.13, Hadoop 1.0.4
Reporter: fuggy_yama
I have following table in cassandra:
{code:sql}CREATE TABLE IF NOT EXISTS summary
(
it int,
id int,
x float,
y float,
PRIMARY KEY (it, id, x, y)
){code}
In hadoop job definition i set output/update query:
{code:java}String outputQuery = "UPDATE " + params.get("output_keyspace") + "."
+ params.get("output_column_family") + " SET x=?, y=?";
CqlConfigHelper.setOutputCql(job.getConfiguration(), outputQuery);{code}
When hadoop job wants to write results from reducers to cassandra then I get
this exception:
{code:java}java.io.IOException: java.lang.RuntimeException: failed to prepare
cql query UPDATE mgr_kmeans_out_cs.summary_1g SET x=?, y=? WHERE "it" = ? AND
"id" = ? AND "x" = ? AND "y" = ?
at
org.apache.cassandra.hadoop.cql3.CqlRecordWriter$RangeClient.run(CqlRecordWriter.java:256)
Caused by: java.lang.RuntimeException: failed to prepare cql query UPDATE
mgr_kmeans_out_cs.summary_1g SET x=?, y=? WHERE "it" = ? AND "id" = ? AND "x" =
? AND "y" = ?
at
org.apache.cassandra.hadoop.cql3.CqlRecordWriter$RangeClient.preparedStatement(CqlRecordWriter.java:300)
at
org.apache.cassandra.hadoop.cql3.CqlRecordWriter$RangeClient.run(CqlRecordWriter.java:237)
Caused by: InvalidRequestException(why:PRIMARY KEY part x found in SET part)
at
org.apache.cassandra.thrift.Cassandra$prepare_cql3_query_result$prepare_cql3_query_resultStandardScheme.read(Cassandra.java:51017)
at
org.apache.cassandra.thrift.Cassandra$prepare_cql3_query_result$prepare_cql3_query_resultStandardScheme.read(Cassandra.java:50994)
at
org.apache.cassandra.thrift.Cassandra$prepare_cql3_query_result.read(Cassandra.java:50933)
at org.apache.thrift.TServiceClient.receiveBase(TServiceClient.java:78)
at
org.apache.cassandra.thrift.Cassandra$Client.recv_prepare_cql3_query(Cassandra.java:1756)
at
org.apache.cassandra.thrift.Cassandra$Client.prepare_cql3_query(Cassandra.java:1742)
at
org.apache.cassandra.hadoop.cql3.CqlRecordWriter$RangeClient.preparedStatement(CqlRecordWriter.java:296)
... 1 more{code}
*Can hadoop joob write data to a cassandra table having only PRIMARY KEY
columns?*
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