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Posted to issues@ozone.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2020/12/07 13:44:00 UTC
[jira] [Updated] (HDDS-4525) Replace Hadoop variables and functions
in Ozone shell scripts with Ozone-specific ones
[ https://issues.apache.org/jira/browse/HDDS-4525?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
ASF GitHub Bot updated HDDS-4525:
---------------------------------
Labels: pull-request-available (was: )
> Replace Hadoop variables and functions in Ozone shell scripts with Ozone-specific ones
> --------------------------------------------------------------------------------------
>
> Key: HDDS-4525
> URL: https://issues.apache.org/jira/browse/HDDS-4525
> Project: Hadoop Distributed Data Store
> Issue Type: Improvement
> Components: Ozone CLI
> Reporter: Attila Doroszlai
> Assignee: Attila Doroszlai
> Priority: Critical
> Labels: pull-request-available
>
> Currently Ozone relies on {{HADOOP_\*}} environment variables (eg. {{HADOOP_HOME}}) for historical and practical reasons (code reuse). This can lead t unexpected results if Hadoop and Ozone are both present on a node and they share their environment. Eg. we had to implement a workaround for finding {{ozone-config.sh}} relative to the script being executed when {{HADOOP_HOME}} points to Hadoop, not Ozone (HDDS-1912 and HDDS-4450).
> Another similar severe problem happens if we would like to access Ozone filesystem both via {{ozone}} and {{hadoop}} commands. The latter needs shaded Ozone FS JAR in {{HADOOP_CLASSPATH}}. The same {{HADOOP_CLASSPATH}} results in {{ClassNotFound}} for {{ozone}}.
> The solution proposed in HDDS-1912:
> bq. Long-term we may need to replace all the HADOOP_ environment variable with an OZONE_ environment variable, but that would be a significant bigger change.
> This would allow using different classpaths, logging parameters, and more.
> To be backward compatible, we should use existing {{HADOOP_}} variables as fallback for the corresponding {{OZONE_}} ones, but let {{OZONE_X}} take precedence over {{HADOOP_X}} if the former is defined.
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