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From "Patni, Ankush" <Ankush.Pa...@altisource.com>
Subject Need help in log4j.xml externalization
Date Wed, 21 Oct 2015 13:38:34 GMT
Hello Team,

I am trying to externalize log4j from my task.

So at present I run all the task from one tar.gz. And inside that I have log4j.xml.

But now I want to externalize the log4j.xml so that I can have more control over logs. So
before running my task I tried to set the JAVA_OPTS:


export JAVA_OPTS="-Dlog4j.configuration=file://$PWD/deploy/alice/config/log4j.xml "



And I get the following error when I run my task :



Like : deploy/alice/bin/run-job.sh --config-factory=org.apache.samza.config.factories.PropertiesConfigFactory
--config-path=file://$PWD/deploy/alice/config/EntryTask.properties



log4j:ERROR Could not create an Appender. Reported error follows.

org.apache.samza.SamzaException: Got null container name from system property: samza.container.name.
This is used as the key for the log appender, so can't proceed.

        at org.apache.samza.logging.log4j.StreamAppender.activateOptions(StreamAppender.java:89)

        at org.apache.log4j.config.PropertySetter.activate(PropertySetter.java:307)

        at org.apache.log4j.xml.DOMConfigurator.parseAppender(DOMConfigurator.java:295)

        at org.apache.log4j.xml.DOMConfigurator.findAppenderByName(DOMConfigurator.java:176)



Then I tried with following command :


export JAVA_OPTS="-Dlog4j.configuration=file://$PWD/deploy/alice/config/log4j.xml -Dsamza.container.name=samza-application-master"


log4j:ERROR Could not create an Appender. Reported error follows.
java.lang.NullPointerException
        at java.io.StringReader.<init>(StringReader.java:50)
        at org.codehaus.jackson.JsonFactory.createJsonParser(JsonFactory.java:636)
        at org.codehaus.jackson.map.ObjectMapper.readValue(ObjectMapper.java:1863)
        at org.apache.samza.logging.log4j.StreamAppender.getConfig(StreamAppender.java:180)
        at org.apache.samza.logging.log4j.StreamAppender.activateOptions(StreamAppender.java:92)
        at org.apache.log4j.config.PropertySetter.activate(PropertySetter.java:307)
        at org.apache.log4j.xml.DOMConfigurator.parseAppender(DOMConfigurator.java:295)



So my doubt is : why we need to give first of all -Dsamza.container.name=samza-application-master
as it is already present in run-am.sh

Second thing could anyone please help me in externilaztion of log4j.xml.

  Regards,
Ankush
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