How to configure log4j for a druid noide

[dav...@blismedia.com]

Hi,

I am currently deploying my nodes on a few machines and I was actually wondering about the best method to deal with log files.

As far as I know, Druid is using log4j. I have tried to drop a log4j.properties in the same folder of the realtime.properties file, but with no luck.

What's the right way of doing this?

Thanks,

Davide

@BlisMedia

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[Davide Anastasia]

Alright, I have managed using -Dlog4j.configuration. Is that the right way?

D.

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[Davide Anastasia]

Hi,

Despite thinking that I had managed to do this, I am still stuck. I have read the page http://druid.io/docs/0.6.145/Logging.html , and wrote my new log4j.xml file:

<?xml version="1.0" encoding="UTF-8" ?>

<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">

<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">

  <appender name="FileAppender" class="org.apache.log4j.DailyRollingFileAppender">

    <param name="file" value="/mnt/druid/logs/historical.log" />

    <param name="MaxBackupIndex" value="5" />

    <param name="MaxFileSize" value="10MB" />

    <param name="DatePattern" value="'.'yyyy-MM-dd-HH" />

    <layout class="org.apache.log4j.PatternLayout">

      <param name="ConversionPattern" value="%d{ISO8601} %-5p [%t] %c - %m%n"/>

    </layout>

  </appender>

  <!-- ServerView-related stuff is way too chatty -->

  <logger name="io.druid.client.BatchServerInventoryView">

    <level value="warn"/>

  </logger>

  <logger name="io.druid.curator.inventory.CuratorInventoryManager">

    <level value="warn"/>

  </logger>

  <root>

    <priority value="INFO" />

    <appender-ref ref="FileAppender"/>

  </root>

</log4j:configuration>

Unfortunately, either storing the file in the classpath (same directory where my runtime.properties is stored), or using the -Dlog4j.properties=... is helping. 

I am using 0.6.130 currently, but I can switch to another version, if required. 

Can anybody give me an hint of what I am doing wrong?

Thanks,

Davide

[Gian Merlino]

Putting it on your classpath should work, as long as it is before the jars. We do something like "java -cp conf:druid-foo.jar io.druid.cli.Main server broker" where "conf" is a directory containing the log4j.xml. Does it still not get picked up if you do something like that?

[Davide Anastasia]

Thanks Gian,

it does work if I invert the order!

Cheers,

Davide

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[Kiran Raj]

Hello guys,

 I am trying to make changes to my log4j2.xml file under(/opt/druid/conf/druid/_common) 

 Once I make the changes how do I see the changes should I restart something ??

Thanks!

-Kiran

[Gian Merlino]

Yes, you should restart all your Druid services to pick up the changes. I think log4j2 has a "watching" mode but that isn't configured by default.

Gian

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[Kiran Raj]

Thanks. Restarting the Druid services helped. 

On Thursday, January 5, 2017 at 9:06:59 PM UTC+5:30, Gian Merlino wrote:

Yes, you should restart all your Druid services to pick up the changes. I think log4j2 has a "watching" mode but that isn't configured by default.

Gian

On Thu, Jan 5, 2017 at 4:17 AM, Kiran Raj <kiranf...@gmail.com> wrote:

Hello guys,

 I am trying to make changes to my log4j2.xml file under(/opt/druid/conf/druid/_common) 

 Once I make the changes how do I see the changes should I restart something ??

Thanks!

-Kiran

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[Kiran Raj]

Hello again,

 I am working with druid and I have a situation.

 I need a log4j2.xml under druid/conf/druid/_common that can take care of all the log file(Broker,Coordinator etc). 

 

Problem I am facing:-

 when I add multiple "RollingFile" to handle each of the .log file. But it seems to go wrong.

Can you help me solve this? 

[Gian Merlino]

What's going wrong exactly?

Gian

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