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Posted to dev@flume.apache.org by Ralph Goers <ra...@dslextreme.com> on 2022/06/13 21:01:53 UTC

Log4j & user doc

Tristan,

Although I see references to -Dflume.root.logger I see no place that actually implements support for it. So I removed those from the documentation.

There are still references to Log4j 1 but those are all for Flume’s Log4j Appender, which still targets Log4j 1. 

Please review the Flume web site for any other issues there.

Ralph

Re: Log4j & user doc

Posted by Ralph Goers <ra...@dslextreme.com>.
Sorry, yes I was going to mention that I added this support as noted by Sean. However, it only works when the configuration in in properties format.
Flume is currently packaged with an XML configuration, probably because I hate the properties format. But as Sean notes, this could be resolved by converting log4j2.xml to log4j2.properties and making sure to include the system property reference.

Ralph


> On Jun 14, 2022, at 9:59 AM, Sean Busbey <sb...@apple.com.INVALID> wrote:
> 
> Log4j 2.17.2 added the needed building blocks via LOG4J2-3341 at the request of the Hadoop and HBase projects.
> 
> For example, the out of the box HBase log4j2.properties file includes several references to system properties, including this for the root logger:
> 
> ```
> rootLogger = ${sys:hbase.root.logger:-INFO,console}
> ```
> 
> And then our out of the box bootstrapping scripts include setting the parameter based on an environment variable:
> 
> ```
> HBASE_OPTS="$HBASE_OPTS -Dhbase.root.logger=${HBASE_ROOT_LOGGER:-INFO,console}"
> ```
> 
> We could implement something similar to allow setting a system property to change the root logger.
> 
>> On Jun 13, 2022, at 4:33 PM, Tristan Stevens <tr...@apache.org> wrote:
>> 
>> Hi Ralph,
>> That's the one that I had trouble with. Is there an equivalent system parameter that you can set to get the same behaviour with log4j2?
>> 
>> Tristan
>> 
>> Get Outlook for Android<https://aka.ms/AAb9ysg>
>> 
>> ________________________________
>> From: Ralph Goers <ra...@dslextreme.com>
>> Sent: Monday, 13 June 2022, 22:04
>> To: dev@flume.apache.org <de...@flume.apache.org>
>> Subject: Log4j & user doc
>> 
>> Tristan,
>> 
>> Although I see references to -Dflume.root.logger I see no place that actually implements support for it. So I removed those from the documentation.
>> 
>> There are still references to Log4j 1 but those are all for Flume’s Log4j Appender, which still targets Log4j 1.
>> 
>> Please review the Flume web site for any other issues there.
>> 
>> Ralph
>> 
> 
>

Re: Log4j & user doc

Posted by Sean Busbey <sb...@apple.com.INVALID>.
Log4j 2.17.2 added the needed building blocks via LOG4J2-3341 at the request of the Hadoop and HBase projects.

For example, the out of the box HBase log4j2.properties file includes several references to system properties, including this for the root logger:

```
rootLogger = ${sys:hbase.root.logger:-INFO,console}
```

And then our out of the box bootstrapping scripts include setting the parameter based on an environment variable:

```
HBASE_OPTS="$HBASE_OPTS -Dhbase.root.logger=${HBASE_ROOT_LOGGER:-INFO,console}"
```

We could implement something similar to allow setting a system property to change the root logger.

> On Jun 13, 2022, at 4:33 PM, Tristan Stevens <tr...@apache.org> wrote:
> 
> Hi Ralph,
> That's the one that I had trouble with. Is there an equivalent system parameter that you can set to get the same behaviour with log4j2?
> 
> Tristan
> 
> Get Outlook for Android<https://aka.ms/AAb9ysg>
> 
> ________________________________
> From: Ralph Goers <ra...@dslextreme.com>
> Sent: Monday, 13 June 2022, 22:04
> To: dev@flume.apache.org <de...@flume.apache.org>
> Subject: Log4j & user doc
> 
> Tristan,
> 
> Although I see references to -Dflume.root.logger I see no place that actually implements support for it. So I removed those from the documentation.
> 
> There are still references to Log4j 1 but those are all for Flume’s Log4j Appender, which still targets Log4j 1.
> 
> Please review the Flume web site for any other issues there.
> 
> Ralph
>

Re: Log4j & user doc

Posted by Tristan Stevens <tr...@apache.org>.
Hi Ralph,
That's the one that I had trouble with. Is there an equivalent system parameter that you can set to get the same behaviour with log4j2?

Tristan

Get Outlook for Android<https://aka.ms/AAb9ysg>

________________________________
From: Ralph Goers <ra...@dslextreme.com>
Sent: Monday, 13 June 2022, 22:04
To: dev@flume.apache.org <de...@flume.apache.org>
Subject: Log4j & user doc

Tristan,

Although I see references to -Dflume.root.logger I see no place that actually implements support for it. So I removed those from the documentation.

There are still references to Log4j 1 but those are all for Flume’s Log4j Appender, which still targets Log4j 1.

Please review the Flume web site for any other issues there.

Ralph