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Posted to issues@hbase.apache.org by "shenshengli (Jira)" <ji...@apache.org> on 2021/01/04 02:25:00 UTC
[jira] [Commented] (HBASE-25449) 'dfs.client.read.shortcircuit'
should not be set in hbase-default.xml
[ https://issues.apache.org/jira/browse/HBASE-25449?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17257899#comment-17257899 ]
shenshengli commented on HBASE-25449:
-------------------------------------
{quote}Do you mean, users could forget to set it in hbase and in hdfs?
{quote}
Yes.I just left the default value of this configuration empty so that I could use the HDFS configuration directly.
{quote}I don't follow why this hbase-default configuration does not prevail over the hdfs default? Is it that the hdfs jar with hdfs-default it in comes before hbase-default in the classpath?
{quote}
This hbase-default configuration does prevail over the hdfs default,and prevail over the hdfs-site.
{quote}Is it that you observe in operation that the default dfs.client.read.shortcircuit=true in hbase-default is not happening?
{quote}
I find the default dfs.client.read.shortcircuit=false in hbase-default.So, even if this value is true in my HDFs-site.xml, I still need to explicitly set it in hbase-site.xml.
> 'dfs.client.read.shortcircuit' should not be set in hbase-default.xml
> ---------------------------------------------------------------------
>
> Key: HBASE-25449
> URL: https://issues.apache.org/jira/browse/HBASE-25449
> Project: HBase
> Issue Type: Improvement
> Components: conf
> Affects Versions: 2.0.1
> Reporter: shenshengli
> Assignee: shenshengli
> Priority: Major
>
> I think this parameter is not suitable for in hbase-default.xml, because in this case, HDFS explicitly set to "dfs.client.read.shortcircuit=true", hbase rely on HDFS configuration, the parameters in hbase service still is false.Must be explicitly in hbase-site.xml is set to "dfs.client.read.shortcircuit=true" to take effect.
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