[HIVE-131] insert overwrite directory leaves behind uncommitted/tmp files from failed tasks

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Fix Version/s: 0.3.0
• Component/s: Query Processor
• Hadoop Flags: Reviewed

Release Note

HIVE-131. Remove uncommitted files from failed tasks. (Joydeep Sen Sarma via zshao)

• Assignee: Joydeep Sen Sarma
• Reporter: Joydeep Sen Sarma
• Created: 07/Dec/08 10:07
• Updated: 20/Nov/23 10:33
• Resolved: 19/Feb/09 02:38

Description

_tmp files are getting left behind on insert overwrite directory:

/user/jssarma/ctst1/40422_m_000195_0.deflate <r 3> 13285 2008-12-07 01:47 rw-r-r- jssarma supergroup
/user/jssarma/ctst1/40422_m_000196_0.deflate <r 3> 3055 2008-12-07 01:46 rw-r-r- jssarma supergroup
/user/jssarma/ctst1/_tmp.40422_m_000033_0 <r 3> 0 2008-12-07 01:53 rw-r-r- jssarma supergroup
/user/jssarma/ctst1/_tmp.40422_m_000037_1 <r 3> 0 2008-12-07 01:53 rw-r-r- jssarma supergroup

this happened with speculative execution. the code looks good (in fact in this case many speculative tasks were launched - and only a couple caused problems). Almost seems like these files did not appear in the namespace until after the map-reduce job finished and the movetask did a listing of the output dir ..

Issue Links

• is duplicated by: HIVE-277 Files created by redundant tasks that have been killed are taken into consideration
• relates to: HIVE-27884 LLAP: Reuse FileSystem objects from cache across different tasks in the same LLAP daemon