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Posted to issues@hbase.apache.org by "Andrew Purtell (JIRA)" <ji...@apache.org> on 2013/07/11 03:39:49 UTC
[jira] [Comment Edited] (HBASE-8926) Do not set default GC options
in hbase-env.sh
[ https://issues.apache.org/jira/browse/HBASE-8926?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13705374#comment-13705374 ]
Andrew Purtell edited comment on HBASE-8926 at 7/11/13 1:39 AM:
----------------------------------------------------------------
Not a big deal.
bq. How are we going to default to CMS then
Yes, that is what I am arguing, we don't set up any GC in hbase-env.sh, or HBASE_OPTS. Everybody is going to change this. Every other 'export ...' line in hbase-env.sh is commented out except for HBASE_OPTS.
bq. If G1 is used, shouldn't that setting override HBASE_OPTS anyway?
One common method for incrementally updating configuration is to do something effectively like:
{noformat}
echo "HBASE_OPTS=\"\$HBASE_OPTS foo\"" >> /etc/hbase/conf/hbase-env.sh
{noformat}
It's also trivial to edit hbase-env.sh with sed but since every other setting in the default hbase-env.sh seems to serve a documentary purpose...
was (Author: apurtell):
Not a big deal.
bq. How are we going to default to CMS then
Yes, that is what I am arguing, we don't set up any GC in hbase-env.sh, or HBASE_OPTS. Everybody is going to change this. Every other setting in hbase-env.sh is commented except for HBASE_OPTS.
bq. If G1 is used, shouldn't that setting override HBASE_OPTS anyway?
One common method for incrementally updating configuration is to do something effectively like:
{noformat}
echo "HBASE_OPTS=\"\$HBASE_OPTS foo\"" >> /etc/hbase/conf/hbase-env.sh
{noformat}
It's also trivial to edit hbase-env.sh with sed but since every other setting in the default hbase-env.sh seems to serve a documentary purpose...
> Do not set default GC options in hbase-env.sh
> ---------------------------------------------
>
> Key: HBASE-8926
> URL: https://issues.apache.org/jira/browse/HBASE-8926
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.98.0, 0.95.2, 0.94.10
> Reporter: Andrew Purtell
> Assignee: Andrew Purtell
> Priority: Trivial
> Attachments: 8926.patch
>
>
> Exporting default GC options in HBASE_OPTS from hbase-env.sh by default can interfere with some deployment scenarios. We probably shouldn't be doing that.
> Noticed this when using scripts to set up EC2 test clusters for G1 GC. Having "-XX:+UseConcMarkSweepGC" on the command line in that case will cause the JVMs to fail to launch.
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