Hari Sekhon created TEZ-2322:
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Summary: Succeeded count wrong for Pig on Tez job, decreased 380
=> 181
Key: TEZ-2322
URL: https://issues.apache.org/jira/browse/TEZ-2322
Project: Apache Tez
Issue Type: Bug
Affects Versions: 0.5.2
Environment: HDP 2.2
Reporter: Hari Sekhon
Priority: Minor
During a Pig on Tez job the number of succeeded tasks dropped from 380 => 181
as shown below:
{code}
2015-04-15 15:09:56,992 [Timer-0] INFO
org.apache.pig.backend.hadoop.executionengine.tez.TezJob - DAG Status:
status=RUNNING, progress=TotalTasks: 905 Succeeded: 380 Running: 58 Failed: 0
Killed: 0 FailedTaskAttempts: 10 KilledTaskAttempts: 16, diagnostics=
2015-04-15 15:10:16,992 [Timer-0] INFO
org.apache.pig.backend.hadoop.executionengine.tez.TezJob - DAG Status:
status=RUNNING, progress=TotalTasks: 905 Succeeded: 380 Running: 58 Failed: 0
Killed: 0 FailedTaskAttempts: 10 KilledTaskAttempts: 16, diagnostics=
2015-04-15 15:10:36,992 [Timer-0] INFO
org.apache.pig.backend.hadoop.executionengine.tez.TezJob - DAG Status:
status=RUNNING, progress=TotalTasks: 905 Succeeded: 380 Running: 58 Failed: 0
Killed: 0 FailedTaskAttempts: 10 KilledTaskAttempts: 16, diagnostics=
2015-04-15 15:10:56,992 [Timer-0] INFO
org.apache.pig.backend.hadoop.executionengine.tez.TezJob - DAG Status:
status=RUNNING, progress=TotalTasks: 905 Succeeded: 181 Running: 724 Failed: 0
Killed: 0 FailedTaskAttempts: 10 KilledTaskAttempts: 89, diagnostics=
2015-04-15 15:11:16,992 [Timer-0] INFO
org.apache.pig.backend.hadoop.executionengine.tez.TezJob - DAG Status:
status=RUNNING, progress=TotalTasks: 905 Succeeded: 181 Running: 724 Failed: 0
Killed: 0 FailedTaskAttempts: 10 KilledTaskAttempts: 89, diagnostics=
2015-04-15 15:11:36,992 [Timer-0] INFO
org.apache.pig.backend.hadoop.executionengine.tez.TezJob - DAG Status:
status=RUNNING, progress=TotalTasks: 905 Succeeded: 182 Running: 723 Failed: 0
Killed: 0 FailedTaskAttempts: 10 KilledTaskAttempts: 89, diagnostics=
2015-04-15 15:11:56,993 [Timer-0] INFO
org.apache.pig.backend.hadoop.executionengine.tez.TezJob - DAG Status:
status=RUNNING, progress=TotalTasks: 905 Succeeded: 184 Running: 721 Failed: 0
Killed: 0 FailedTaskAttempts: 10 KilledTaskAttempts: 89, diagnostics=
2015-04-15 15:12:16,992 [Timer-0] INFO
org.apache.pig.backend.hadoop.executionengine.tez.TezJob - DAG Status:
status=RUNNING, progress=TotalTasks: 905 Succeeded: 186 Running: 719 Failed: 0
{code}
Now this may be because the tasks failed, some certainly did due to space
exceptions, but surely once a task has finished successfully and is marked as
succeeded it cannot then be removed from the succeeded count? Perhaps the
succeeded counter is incremented too early before the task results are really
saved?
KilledTaskAttempts jumped from 16 => 89 at the same time, but even this doesn't
account for the large drop in number of succeeded tasks.
There was also a noticeable jump in Running tasks from 58 => 724 at the same
time which is suspicious, I'm pretty sure there was no contending job to finish
and release so much more resource to this Tez job.
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