[PIG-2534] Pig generating infinite map outputs

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.9.1
• Fix Version/s: 0.10.0, 0.9.3, 0.11
• Hadoop Flags: Reviewed
• Assignee: Daniel Dai
• Reporter: Vivek Padmanabhan
• Created: 15/Feb/12 19:57
• Updated: 26/Jul/13 17:59
• Resolved: 01/Mar/12 07:22

Description

I am getting a strange behavior by Pig in the below script for Pig 0.9.

event_serve = LOAD 'input1'   AS (s, m, l);
cm_data_raw = LOAD 'input2'  AS (s, m, l);

SPLIT cm_data_raw INTO
    cm_serve_raw IF (( (chararray) (s#'key1') == '0') AND ( (chararray) (s#'key2') == '5')),
    cm_click_raw IF (( (chararray) (s#'key1') == '1') AND ( (chararray) (s#'key2') == '5'));

cm_serve = FOREACH cm_serve_raw GENERATE  s#'key3' AS f1,  s#'key4' AS f2, s#'key5' AS f3 ;
cm_serve_lowercase = stream cm_serve through `echo val3`;

cm_serve_final = FOREACH cm_serve_lowercase GENERATE  $0 AS cm_event_guid, $1 AS cm_receive_time, $2 AS cm_ctx_url;

event_serve_filtered = FILTER event_serve BY  (chararray) (s#'key1') neq 'xxx' AND (chararray) (s#'key2') neq 'yyy' ;

event_serve_project = FOREACH event_serve_filtered GENERATE  s#'key3' AS event_guid, s#'key4' AS receive_time;

event_serve_join = join cm_serve_final by (cm_event_guid),
    event_serve_project by (event_guid);

store event_serve_join into 'somewhere';

Input (both input1 and input2 is same)
—
key1#0,key2#5,key3#val3,key4#val4,key5#val5

If i run this pig script with ColumnMapKeyPrune disabled, the job goes through fine and 1 output is created.
But if I run this script by default, then it keeps on generating map output records infinitely.

Issue Links

• relates to: PIG-2566 Refactory ColumnPruneHelper not throw exception in normal flow