[jira] [Created] (SAMZA-60) Specify log directory as a Java property for Log4j

["Chris Riccomini (JIRA)" <ji...@apache.org>]

Chris Riccomini created SAMZA-60:
------------------------------------

             Summary: Specify log directory as a Java property for Log4j
                 Key: SAMZA-60
                 URL: https://issues.apache.org/jira/browse/SAMZA-60
             Project: Samza
          Issue Type: Bug
          Components: container, yarn
    Affects Versions: 0.6.0
            Reporter: Chris Riccomini


We currently specify SAMZA_LOG_DIR as an environment variable when starting Samza's YARN AM, and also when starting a Samza container with YARN.

It'd be nice to expose the Samza job's name as an environment variable, as well: SAMZA_JOB_NAME.

It'd also be nice to use these variables in log4j.xml (for example), so we can have a file-based appender. Unfortunately, it appears that Log4j wants Java system properties, not environment variables.

Let's update run-class.sh to append new Java system properties to SAMZA_OPTS:

{noformat}
SAMZA_OPTS="$SAMZA_OPTS -Dsamza.log.dir=$SAMZA_LOG_DIR -Dsamza.job.name=$SAMZA_JOB_NAME"
{noformat}

Then, in log4j.xml, we should be able to set a file appender:

{noformat}
      <appender  name = "samzaAppender" class="org.apache.log4j.RollingFileAppender">
        ...
        <param name="file" value="${samza.log.dir}/${samza.job.name}.log" />
        ...
    </appender>
{noformat}



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