xueluning created HIVE-24441:
--------------------------------
Summary: There is no backup task for some mapJoin in version 2.3.6
Key: HIVE-24441
URL: https://issues.apache.org/jira/browse/HIVE-24441
Project: Hive
Issue Type: Bug
Affects Versions: 2.3.6
Environment: hive version 2.3.6
Reporter: xueluning
Attachments: 2_3_2.png, 2_3_6.png
I'm using AWS EMR5.30 with hive-2.3.6.
I run a sql script using hive command, it failed and stoped on a map join local
task to fetch the small table into hashtable.
but what I exceped is that when the mapjoin local task failed ,it run the
backup task which is a common join.
but this issue doesn't happen on hive-2.3.2. I run the same script on
hive-2.3.2。the mapjoin local task failed and then "ATTEMPT: Execute
BackupTask:".
when I explain the same script, the error stage has backup stage on hive-2.3.2
but not for hive-2.3.6.
attached screenshot show differents.
on hive-2.3.2, Stage-28 is the mapJoin operate local task. we can see it has a
backup stage.
on hive-2.3.6, Stage-27 is the same stage, but it does not have a backup stage.
this stage is the root stage fetch data from input table.
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
