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From "Brad Willard (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SPARK-5008) Persistent HDFS does not recognize EBS Volumes
Date Tue, 13 Jan 2015 17:42:34 GMT

    [ https://issues.apache.org/jira/browse/SPARK-5008?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14275586#comment-14275586
] 

Brad Willard commented on SPARK-5008:
-------------------------------------

[~nchammas] I went ahead and created a cluster with this

./spark-ec2 -v 1.2.0 --wait 235 -k ....... --copy-aws-credentials --hadoop-major-version 1
-z us-east-1c -s 2 -m c1.medium -t c1.medium launch spark-hdfs-bug --ebs-vol-size 10 --ebs-vol-type
gp2 --ebs-vol-num 1

I updated the core-site.xml and switched /vol -> to /vol0. ran copy-dir and restarted via
stop-all.sh and start-all.sh.
That brings it up in a broken state. However if I then modify the core-site.xml back to /vol
on master and restart, it works correctly.

So that's a partial solution. I assume this is because the master node doesn't get an ebs
volume.

> Persistent HDFS does not recognize EBS Volumes
> ----------------------------------------------
>
>                 Key: SPARK-5008
>                 URL: https://issues.apache.org/jira/browse/SPARK-5008
>             Project: Spark
>          Issue Type: Bug
>          Components: EC2
>    Affects Versions: 1.2.0
>         Environment: 8 Node Cluster Generated from 1.2.0 spark-ec2 script.
> -m c3.2xlarge -t c3.8xlarge --ebs-vol-size 300 --ebs-vol-type gp2 --ebs-vol-num 1
>            Reporter: Brad Willard
>
> Cluster is built with correct size EBS volumes. It creates the volume at /dev/xvds and
it mounted to /vol0. However when you start persistent hdfs with start-all script, it starts
but it isn't correctly configured to use the EBS volume.
> I'm assuming some sym links or expected mounts are not correctly configured.
> This has worked flawlessly on all previous versions of spark.
> I have a stupid workaround by installing pssh and mucking with it by mounting it to /vol,
which worked, however it doesn't not work between restarts.



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