[DRILL-4323] Hive Native Reader : A simple count(*) throws Incoming batch has an empty schema error

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 1.5.0
• Fix Version/s: 1.6.0
• Component/s: Storage - Hive
• Assignee: Sean Hsuan-Yi Chu
• Reporter: Rahul Kumar Challapalli
• Reviewer: Rahul Kumar Challapalli
• Created: 28/Jan/16 21:20
• Updated: 21/Mar/16 05:04
• Resolved: 05/Feb/16 06:59

Description

git.commit.id.abbrev=3d0b4b0

A simple count query does not work when hive native reader is enabled

0: jdbc:drill:zk=10.10.100.190:5181> select count(*) from customer;
+---------+
| EXPR$0  |
+---------+
| 100000  |
+---------+
1 row selected (3.074 seconds)
0: jdbc:drill:zk=10.10.100.190:5181> alter session set `store.hive.optimize_scan_with_native_readers` = true;
+-------+--------------------------------------------------------+
|  ok   |                        summary                         |
+-------+--------------------------------------------------------+
| true  | store.hive.optimize_scan_with_native_readers updated.  |
+-------+--------------------------------------------------------+
1 row selected (0.2 seconds)
0: jdbc:drill:zk=10.10.100.190:5181> select count(*) from customer;
Error: SYSTEM ERROR: IllegalStateException: Incoming batch [#1341, ProjectRecordBatch] has an empty schema. This is not allowed.

Fragment 0:0

[Error Id: 4c867440-0fd3-4eda-922f-0f5eadcb1463 on qa-node191.qa.lab:31010] (state=,code=0)

Hive DDL for the table :

create table customer
(
    c_customer_sk int,
    c_customer_id string,
    c_current_cdemo_sk int,
    c_current_hdemo_sk int,
    c_current_addr_sk int,
    c_first_shipto_date_sk int,
    c_first_sales_date_sk int,
    c_salutation string,
    c_first_name string,
    c_last_name string,
    c_preferred_cust_flag string,
    c_birth_day int,
    c_birth_month int,
    c_birth_year int,
    c_birth_country string,
    c_login string,
    c_email_address string,
    c_last_review_date string
)
STORED AS PARQUET
LOCATION '/drill/testdata/customer'

Attached the log file with the stacktrace