Anant Mittal created TEZ-3814:
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Summary: Inserts into a bucketed table fail randomly with Hive on
Tez
Key: TEZ-3814
URL: https://issues.apache.org/jira/browse/TEZ-3814
Project: Apache Tez
Issue Type: Bug
Affects Versions: 0.7.0
Reporter: Anant Mittal
The MAP phase for Inserts into a bucketed table randomly fails with the error
"Vertex <vertex_id> [Map 1] failed as task <task_id> failed after vertex
succeeded.]DAG did not succeed due to VERTEX_FAILURE. failedVertices:1
killedVertices:0".
The task fails because it fails for all attempts with "<attempt_id> being
failed for too many output errors. failureFraction=0.2,
MAX_ALLOWED_OUTPUT_FAILURES_FRACTION=0.1, uniquefailedOutputReports=1,
MAX_ALLOWED_OUTPUT_FAILURES=10, MAX_ALLOWED_TIME_FOR_TASK_READ_ERROR_SEC=300,
readErrorTimespan=0"
This happens more often if the table is ACID enabled and a delete operation is
performed before the inserts.
I have tried the following:
Changed tez.am.launch.cmd-opts, tez.task.launch.cmd-opts and hive.tez.java.opts
to use parallel GC.
tez.runtime.shuffle.max.allowed.failed.fetch.fraction = 0.95
tez.runtime.shuffle.failed.check.since-last.completion=false
tez.runtime.shuffle.fetch.buffer.percent = 0.1
tez.runtime.shuffle.memory.limit.percent = 0.25
tez.runtime.shuffle.ssl.enable=false
Deleted ".../usercache/<user>/filecache" and ".../usercache/<user>/appcache"
Please advise as to what might be a solution and if anyone else is able to
successfully run large number of inserts on a bucketed table via Tez. I am
using HDP 2.6 dsitribution.
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