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HIVE MR VS TEZ difference in output, ,Hi,

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HIVE MR VS TEZ difference in output, ,Hi,

New Contributor

Hi,

Hive table created using normal MR is not accessing records when using TEZ as execution engine and vice versa.

I created one table using normal MR and the same table I am trying to access by setting engine as TEZ, when using tez, zero records fetching and if i remove tez then getting all records and same is applicable in reverse condition. Why such difference?

,

1 ACCEPTED SOLUTION

Accepted Solutions

Re: HIVE MR VS TEZ difference in output, ,Hi,

Rising Star

@S. Sali

I am pretty sure it might be something related to the way the bucketed table is loaded. Did you have necessary properties set when loading the Hive table ? Especially hive.enforce.bucketing = true

https://cwiki.apache.org/confluence/display/Hive/LanguageManual+DDL+BucketedTables

I would recommend recreate the table by setting necessary properties and let me know if that works.

16 REPLIES 16

Re: HIVE MR VS TEZ difference in output, ,Hi,

Rising Star

@S. Sali

Can you post the transcript of the commands you have executed ? Also what version of HDP are you on and what is the Hive version ?

Re: HIVE MR VS TEZ difference in output, ,Hi,

New Contributor

Hi,

I have uploaded the screenshot here, first one using MR and second using the TEZ.

Version 2.3.2.0-2950

8811-using-mr.png

8812-using-tez.png

Re: HIVE MR VS TEZ difference in output, ,Hi,

Rising Star

@S. Sali

What version of HDP and Hive you are using ? Also can you upload the output of

describe formatted grdm.fnl_glbl_currency

Re: HIVE MR VS TEZ difference in output, ,Hi,

New Contributor

hadoop and hive version - 2.3.2.0-2950

hive> describe formatted grdm.fnl_glbl_currency > ; OK # col_name data_type comment currency_sk int currency_cd varchar(55) currency_dsc varchar(4000) country_nm varchar(255) row_effective_start_dt date row_effective_end_dt date created_job_run_id int updated_job_run_id int created_dts timestamp modified_dts timestamp source_system_join_key varchar(1000) natural_key_col_checksum_str varchar(255) type1_column_checksum_str varchar(255) type2_column_checksum_str varchar(255) system_gen_rec_flg varchar(1) # Partition Information # col_name data_type comment source_system_sk int current_rec_flg string #

Detailed Table Information Database: grdm Owner: cmanyar CreateTime: Mon Oct 03 15:51:54 CDT 2016 LastAccessTime: UNKNOWN Protect Mode: None Retention: 0

Location: hdfs://DenaliQA/dl/hive/warehouse/final/be/global/grdm/grdm.db/fnl_glbl_currency

Table Type: MANAGED_TABLE Table Parameters: orc.compress SNAPPY transient_lastDdlTime 1475527914 # Storage Information SerDe Library: org.apache.hadoop.hive.ql.io.orc.OrcSerde InputFormat: org.apache.hadoop.hive.ql.io.orc.OrcInputFormat OutputFormat: org.apache.hadoop.hive.ql.io.orc.OrcOutputFormat Compressed: No Num Buckets: 10 Bucket Columns: [source_system_join_key] Sort Columns: [] Storage Desc Params: field.delim \u0001 serialization.format \u0001 Time taken: 1.992 seconds, Fetched: 48 row(s) hive>

Highlighted

Re: HIVE MR VS TEZ difference in output, ,Hi,

Rising Star

@S. Sali

Do you see this kind of behavior with any other tables or just the bucketed tables ? Can you please check ?

Re: HIVE MR VS TEZ difference in output, ,Hi,

New Contributor

Hi,

I checked the some temp table which is input for final table (grdm.fnl_glbl_currency) and it don't have any bucket specified

Bucket Columns: []

For those temp table, can see the count from both(MR and TEZ) and count is same.

So is it because of bucketing?

How it differs from firing the query from TEZ and from MR?

What is the solution in such situation. Anything I need to specify, do you have any idea?

Re: HIVE MR VS TEZ difference in output, ,Hi,

Rising Star

@S. Sali

I am pretty sure it might be something related to the way the bucketed table is loaded. Did you have necessary properties set when loading the Hive table ? Especially hive.enforce.bucketing = true

https://cwiki.apache.org/confluence/display/Hive/LanguageManual+DDL+BucketedTables

I would recommend recreate the table by setting necessary properties and let me know if that works.

Re: HIVE MR VS TEZ difference in output, ,Hi,

New Contributor

my hdp is 2.3 hive 1.2 sql union all itself

use tez and orc is right

bug use mr is 0

this is my ddl

CREATE TABLE `test.web`
( `id` string , `uid` string , `user_id` int ) 
PARTITIONED BY (`p_date` string) 
ROW FORMAT DELIMITED
FIELDS TERMINATED BY '\t'
COLLECTION ITEMS TERMINATED BY ','
MAP KEYS TERMINATED BY ':' 
LINES TERMINATED BY '\n' 
NULL DEFINED AS '' 
STORED AS ORC 
TBLPROPERTIES('orc.compress'='SNAPPY')

sql

SELECT
	count(*)
FROM
	(
		SELECT
			id,
			user_id
		FROM
			test.web
		WHERE
			p_date = 20171129
		AND user_id > 0
		UNION ALL
			SELECT
				id,
				user_id
			FROM
				test.web
			WHERE
				p_date = 20171129
			AND stat_id = 'adm'
			AND user_id > 0
	) a

can help me ??

Re: HIVE MR VS TEZ difference in output, ,Hi,

New Contributor

hive 1.2 hive.enforce.bucketing default is true

Do need other parameters?

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