[DRILL-817] Parquet file created from impala using data from an impala table causes drill to hang

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.4.0
• Component/s: Storage - Parquet
• Assignee: DrillCommitter
• Reporter: Norris Lee
• Created: 22/May/14 18:21
• Updated: 03/Jul/14 17:08
• Resolved: 03/Jul/14 17:08

Description

A normal table was created with impala:

[localhost.localdomain:21000] > create table integer_table2 (keycolumn string, column1 int) row format delimited fields terminated by ',';
Query: create table integer_table2 (keycolumn string, column1 int) row format delimited fields terminated by ','

Returned 0 row(s) in 0.10s
[localhost.localdomain:21000] > show tables;
Query: show tables
+-----------------------+
| name                  |
+-----------------------+
| integer_table2        |
+-----------------------+
Returned 1 row(s) in 0.01s

Data from a csv is loaded into the table

46:44 PDT 2014)
[localhost.localdomain:21000] > load data inpath '/user/hive/warehouse/Integer_Table.csv' overwrite into table integer_table2;
Query: load data inpath '/user/hive/warehouse/Integer_Table.csv' overwrite into table integer_table2
+----------------------------------------------------------+
| summary                                                  |
+----------------------------------------------------------+
| Loaded 1 file(s). Total files in destination location: 1 |
+----------------------------------------------------------+
Returned 1 row(s) in 0.23s

A parquet table was then created in impala and data loaded in from the first table:

[localhost.localdomain:21000] > create table integer_table (keycolumn string, column1 int) row format delimited fields terminated by ',' stored as parquet;
Query: create table integer_table (keycolumn string, column1 int) row format delimited fields terminated by ',' stored as parquet

Returned 0 row(s) in 0.10s
[localhost.localdomain:21000] > insert overwrite table integer_table select * from integer_table2;
Query: insert overwrite table integer_table select * from integer_table2
Inserted 18 rows in 0.20s

The parquet file (in the format <long alphanumeric string>_data.0 and renamed) was extracted from hdfs and moved to drill's dfs. The query through sqlline hangs:

0: jdbc:drill:schema=hivestg> select * from `dfs`.`/opt/drill/integer.parquet`;
<hang>