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From "Philip Thompson (JIRA)" <>
Subject [jira] [Commented] (CASSANDRA-8358) Bundled tools shouldn't be using Thrift API
Date Tue, 20 Jan 2015 23:25:34 GMT


Philip Thompson commented on CASSANDRA-8358:

Second progress update:
1. JAVA-312 is still being finalized but should be done soon. At that point I will begin on
2. I am able to run pig locally against tables with a subset of data types. Still waiting
on CASSANDRA-8622 to ensure I am not breaking any of the pig tests. Once everything is working
locally, I will take Brandon's advice and run Pig against a real cluster. 

> Bundled tools shouldn't be using Thrift API
> -------------------------------------------
>                 Key: CASSANDRA-8358
>                 URL:
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Aleksey Yeschenko
>            Assignee: Philip Thompson
>             Fix For: 3.0
> In 2.1, we switched cqlsh to the python-driver.
> In 3.0, we got rid of cassandra-cli.
> Yet there is still code that's using legacy Thrift API. We want to convert it all to
use the java-driver instead.
> 1. BulkLoader uses Thrift to query the schema tables. It should be using java-driver
metadata APIs directly instead.
> 2. o.a.c.hadoop.cql3.CqlRecordWriter is using Thrift
> 3. o.a.c.hadoop.ColumnFamilyRecordReader is using Thrift
> 4. o.a.c.hadoop.AbstractCassandraStorage is using Thrift
> 5. o.a.c.hadoop.pig.CqlStorage is using Thrift
> Some of the things listed above use Thrift to get the list of partition key columns or
clustering columns. Those should be converted to use the Metadata API of the java-driver.
> Somewhat related to that, we also have badly ported code from Thrift in o.a.c.hadoop.cql3.CqlRecordReader
(see fetchKeys()) that manually fetches columns from schema tables instead of properly using
the driver's Metadata API.
> We need all of it fixed. One exception, for now, is o.a.c.hadoop.AbstractColumnFamilyInputFormat
- it's using Thrift for its describe_splits_ex() call that cannot be currently replaced by
any java-driver call (?).
> Once this is done, we can stop starting Thrift RPC port by default in cassandra.yaml.

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