[jira] [Updated] (PIG-2534) Pig generating infinite map outputs

["Daniel Dai (Updated) (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/PIG-2534?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Daniel Dai updated PIG-2534:
----------------------------

    Attachment: PIG-2534-2.patch

Attach PIG-2534-2.patch to add comments to setOutputUids, also fix a findbug warning. For refactory, we can certainly do it, but since that is lower priority, I will open a separate ticket to address it.
                
> Pig generating infinite map outputs
> -----------------------------------
>
>                 Key: PIG-2534
>                 URL: https://issues.apache.org/jira/browse/PIG-2534
>             Project: Pig
>          Issue Type: Bug
>    Affects Versions: 0.9.1
>            Reporter: Vivek Padmanabhan
>         Attachments: PIG-2534-1.patch, PIG-2534-2.patch
>
>
> I am getting a strange behavior by Pig in the below script for Pig 0.9.
> {code}
> 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';
> {code}
> 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. 

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