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https://issues.apache.org/jira/browse/SPARK-8939?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14744792#comment-14744792
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Sen Fang commented on SPARK-8939:
---------------------------------
The issue seems to lie in:
https://github.com/amplab/spark-ec2/blob/branch-1.5/templates/root/spark/conf/spark-env.sh#L7
where {{{{spark_worker_instances}}}} is set to empty string
here:
https://github.com/apache/spark/blob/branch-1.5/ec2/spark_ec2.py#L810
This results the following replacement:
{code}
if [ -n ]; then
export SPARK_WORKER_INSTANCES=
fi
{code}
in spark-env.sh. Somehow bash thinks this evaluates to true. This simple fix is
to surround the variable with quote in the if statement.
However, I'm a bit confused that at
https://github.com/apache/spark/blob/v1.5.0/core/src/main/scala/org/apache/spark/SparkConf.scala#L481
suggests this environment variable has been deprecated in favor for
`SPARK_EXECUTOR_INSTANCES` but `--worker-instances` are referenced at a lot of
places thus I'm not sure if we want to remove/deprecate it.
I'm submitting a PR for now since I have tested my fix for YARN and also
verified it didn't break for regular standalone.
> YARN EC2 default setting fails with IllegalArgumentException
> ------------------------------------------------------------
>
> Key: SPARK-8939
> URL: https://issues.apache.org/jira/browse/SPARK-8939
> Project: Spark
> Issue Type: Bug
> Components: EC2
> Affects Versions: 1.5.0
> Reporter: Andrew Or
>
> I just set it up from scratch using the spark-ec2 script. Then I ran
> {code}
> bin/spark-shell --master yarn
> {code}
> which failed with
> {code}
> 15/07/09 03:44:29 ERROR SparkContext: Error initializing SparkContext.
> java.lang.IllegalArgumentException: Unknown/unsupported param
> List(--num-executors, , --executor-memory, 6154m, --executor-memory, 6154m,
> --executor-cores, 2, --name, Spark shell)
> {code}
> This goes away if I provide `--num-executors`, but we should fix the default.
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