Allen George created SPARK-13979:
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Summary: Killed executor is respawned without AWS keys in
standalone spark cluster
Key: SPARK-13979
URL: https://issues.apache.org/jira/browse/SPARK-13979
Project: Spark
Issue Type: Bug
Components: Spark Core
Affects Versions: 1.5.2
Environment: I'm using Spark 1.5.2 with Hadoop 2.7 and running
experiments on a simple standalone cluster:
1 master
2 workers
All ubuntu 14.04 with Java 8/Scala 2.10
Reporter: Allen George
I'm having a problem where respawning a failed executor during a job that
reads/writes parquet on S3 causes subsequent tasks to fail because of missing
AWS keys.
Setup:
I'm using Spark 1.5.2 with Hadoop 2.7 and running experiments on a simple
standalone cluster:
1 master
2 workers
My application is co-located on the master machine, while the two workers are
on two other machines (one worker per machine). All machines are running in
EC2. I've configured my setup so that my application executes its task on two
executors (one executor per worker).
Application:
My application reads and writes parquet files on S3. I set the AWS keys on the
SparkContext by doing:
val sc = new SparkContext()
val hadoopConf = sc.hadoopConfiguration
hadoopConf.set("fs.s3n.awsAccessKeyId", "SOME_KEY")
hadoopConf.set("fs.s3n.awsSecretAccessKey", "SOME_SECRET")
At this point I'm done, and I go ahead and use "sc".
Issue:
I can read and write parquet files without a problem with this setup. *BUT* if
an executor dies during a job and is respawned by a worker, tasks fail with the
following error:
"Caused by: java.lang.IllegalArgumentException: AWS Access Key ID and Secret
Access Key must be specified as the username or password (respectively) of a
s3n URL, or by setting the {{fs.s3n.awsAccessKeyId}} or
{{fs.s3n.awsSecretAccessKey}} properties (respectively)."
I think I've traced this down to the following:
SparkHadoopUtil is initialized with an empty {{SparkConf}}. Later, classes like
{{DataSourceStrategy}} simply call {{SparkHadoopUtil.get.conf}} and access the
(now invalid; missing various properties) {{HadoopConfiguration}} that's built
from this empty {{SparkConf}} object. It's unclear to me why this is done, and
it seems that the code as written would cause broken results anytime callers
use {{SparkHadoopUtil.get.conf}} directly.
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