RE: log4j app logging

[Lemke, Michael ST/HZA-ZIC2]

On Thursday, December 27, 2018 5:35 PM, Mark H. Wood wrote:
>On Wed, Dec 19, 2018 at 06:52:20PM +, Lemke, Michael  ST/HZA-ZIC2 wrote:
>> On December 19, 2018 6:54 PM Lemke, Michael wrote:
>> >On December 18, 2018 8:52 PM Christopher Schultz wrote:
>> >>On 12/18/18 12:42, Lemke, Michael  ST/HZA-ZIC2 wrote:
>> >>> I have an old webapp that uses log4j 1.2 and which I am trying to 
>> >>> deploy on tomcat. For the heck of it I can't get tomcat to use the 
>> >>> log4.properties file. What am I doing wrong?
>> >>
>> >>
...
>> >I guess I have a terrible mess of all sorts of loggers in my libraries. I am
>> >not good at all the different Java loggers. The log4j.properties I want 
>> >to use is for log4j-1.2.27 so not quite bleeding edge ??. Then there are 
>> >other libs that pull in slf4j-api-1.7.25.jar, there is a 
>> >jcl-over-slf4j-1.7.25.jar, 
>> >logback-classic-1.2.3.jar, logback-core-1.2.3.jar.
>> >
>
>If this happens to be a project built with Maven then 'mvn
>dependency:tree' should tell you which artifacts are pulling in
>SLF4J.  You may need to run this more than once as you comb out
>transitive dependencies one by one.
>
>But it's possible to use multiple logging frameworks in one webapp. if
>you include/exclude the right artifacts.  See
>https://www.slf4j.org/legacy.html if you need to do this with SLF4J
>and Log4J v1.

Thank you very much, Mark, this was very helpful. With it I could clean up the 
mess. 
Most important part was to get rid of logback-* and switch everything to slf4j
with the help of slf4j-log4j12. Now everything seems to be working.

Thanks again,
Michael

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Re: log4j app logging

[Mark H. Wood]

On Wed, Dec 19, 2018 at 06:52:20PM +, Lemke, Michael  ST/HZA-ZIC2 wrote:
> On December 19, 2018 6:54 PM Lemke, Michael wrote:
> >On December 18, 2018 8:52 PM Christopher Schultz wrote:
> >>On 12/18/18 12:42, Lemke, Michael  ST/HZA-ZIC2 wrote:
> >>> I have an old webapp that uses log4j 1.2 and which I am trying to 
> >>> deploy on tomcat. For the heck of it I can't get tomcat to use the 
> >>> log4.properties file. What am I doing wrong?
> >>
> >>
> >>How are you initializing log4j?
> >
> >Good question. I just dug a little and have to say I don't know. It
> >is a myfaces 1.1 application and I just realized jsf  has logging built
> >in somehow. I can't find any explicit call to Logger.getLogger in the 
> >code. 
> >
> >I guess I have a terrible mess of all sorts of loggers in my libraries. I am
> >not good at all the different Java loggers. The log4j.properties I want 
> >to use is for log4j-1.2.27 so not quite bleeding edge ??. Then there are 
> >other libs that pull in slf4j-api-1.7.25.jar, there is a 
> >jcl-over-slf4j-1.7.25.jar, 
> >logback-classic-1.2.3.jar, logback-core-1.2.3.jar.
> >
> >Well, I do get quite lot of logging from the app in the tomcat logfiles, so
> >something is working. But I don't know how to configure it.
> >
> >This used to work when I ran it on resin but I also changed quite a bit on
> >the code when I switched to tomcat. I'll try without all the new stuff.
> 
> And this was it. The old version without the stuff that pulls in all the other
> log libraries it works. So tomcat is out of the loop. Sorry for the noise.
> (But if someone has a hint on my mess I wouldn't mind.)

If this happens to be a project built with Maven then 'mvn
dependency:tree' should tell you which artifacts are pulling in
SLF4J.  You may need to run this more than once as you comb out
transitive dependencies one by one.

But it's possible to use multiple logging frameworks in one webapp. if
you include/exclude the right artifacts.  See
https://www.slf4j.org/legacy.html if you need to do this with SLF4J
and Log4J v1.

-- 
Mark H. Wood
Lead Technology Analyst

University Library
Indiana University - Purdue University Indianapolis
755 W. Michigan Street
Indianapolis, IN 46202
317-274-0749
www.ulib.iupui.edu


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RE: log4j app logging

[Lemke, Michael ST/HZA-ZIC2]

On December 19, 2018 6:54 PM Lemke, Michael wrote:
>On December 18, 2018 8:52 PM Christopher Schultz wrote:
>>On 12/18/18 12:42, Lemke, Michael  ST/HZA-ZIC2 wrote:
>>> I have an old webapp that uses log4j 1.2 and which I am trying to 
>>> deploy on tomcat. For the heck of it I can't get tomcat to use the 
>>> log4.properties file. What am I doing wrong?
>>
>>
>>How are you initializing log4j?
>
>Good question. I just dug a little and have to say I don't know. It
>is a myfaces 1.1 application and I just realized jsf  has logging built
>in somehow. I can't find any explicit call to Logger.getLogger in the 
>code. 
>
>I guess I have a terrible mess of all sorts of loggers in my libraries. I am
>not good at all the different Java loggers. The log4j.properties I want 
>to use is for log4j-1.2.27 so not quite bleeding edge ??. Then there are 
>other libs that pull in slf4j-api-1.7.25.jar, there is a 
>jcl-over-slf4j-1.7.25.jar, 
>logback-classic-1.2.3.jar, logback-core-1.2.3.jar.
>
>Well, I do get quite lot of logging from the app in the tomcat logfiles, so
>something is working. But I don't know how to configure it.
>
>This used to work when I ran it on resin but I also changed quite a bit on
>the code when I switched to tomcat. I'll try without all the new stuff.

And this was it. The old version without the stuff that pulls in all the other
log libraries it works. So tomcat is out of the loop. Sorry for the noise.
(But if someone has a hint on my mess I wouldn't mind.)

Thanks,
Michael

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RE: log4j app logging

[Lemke, Michael ST/HZA-ZIC2]

Christopher,

On December 18, 2018 8:52 PM Christopher Schultz wrote:
>On 12/18/18 12:42, Lemke, Michael  ST/HZA-ZIC2 wrote:
>> I have an old webapp that uses log4j 1.2 and which I am trying to 
>> deploy on tomcat. For the heck of it I can't get tomcat to use the 
>> log4.properties file. What am I doing wrong?
>
>Are you trying to get Tomcat to use the log4j.properties file from
>your application? 

No, this is not what I want to do.

>If so, that's not going to work, because Tomcagt
>starts up long before your application is loaded, and so the log4j.jar
>file and log4j.properties file are not used at all.
>
>Your *application* should be able to use log4j without any problems as
>long as the log4j.jar file is in WEB-INB/lib and your log4j.properties
>file is in (usually) WEB-INF/classes/log4j.properties.

Right, I want my application to use its log4j.properties.

>
>> tomcat 9.0.6 is installed as a Windows service and does serve my 
>> webapp, so the app is working fine. The project is mavenized, I
>> put log4.properties to src/main/resources and it ends up in the jar
>> file of my application. Is there anything special that needs to be
>> done?
>
>How are you initializing log4j?

Good question. I just dug a little and have to say I don't know. It
is a myfaces 1.1 application and I just realized jsf  has logging built
in somehow. I can't find any explicit call to Logger.getLogger in the 
code. 

I guess I have a terrible mess of all sorts of loggers in my libraries. I am
not good at all the different Java loggers. The log4j.properties I want 
to use is for log4j-1.2.27 so not quite bleeding edge . Then there are 
other libs that pull in slf4j-api-1.7.25.jar, there is a 
jcl-over-slf4j-1.7.25.jar, 
logback-classic-1.2.3.jar, logback-core-1.2.3.jar.

Well, I do get quite lot of logging from the app in the tomcat logfiles, so
something is working. But I don't know how to configure it.

This used to work when I ran it on resin but I also changed quite a bit on
the code when I switched to tomcat. I'll try without all the new stuff.

Thanks,
Michael

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Re: log4j app logging

[Christopher Schultz]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA256

Michael,

On 12/18/18 13:53, Lemke, Michael  ST/HZA-ZIC2 wrote:
> Thanks, Ryan, this JULI thing actually is what worries me. I don't
> care about tomcat's logging at the moment. It is my webapp's
> logging I can't figure out. It worked on other containers.

Oh, good: you are trying just to manage your own application's logging.

I have this class running as a ServletContextListener:

package xxx;

import javax.servlet.ServletContextListener;
import javax.servlet.ServletContextEvent;

import org.apache.log4j.PropertyConfigurator;
import org.apache.log4j.Logger;
import org.apache.log4j.LogManager;

/**
 * A listener to initialize log4j.
 *
 * @author Chris Schultz
 * @version $Revision: 17834 $ $Date: 2015-12-16 11:03:13 -0500 (Wed,
16 Dec 2015) $
 */
public class Log4jListener
implements ServletContextListener
{
private Logger logger;

@SuppressWarnings("unused")
public void contextInitialized(ServletContextEvent e)
{
// Trigger loading of the log4j.properties file from the
classpath.
new PropertyConfigurator();

logger = Logger.getLogger(this.getClass());

logger.info("Log4j initialized");
}

public void contextDestroyed(ServletContextEvent e)
{
if(LogManager.class.getClassLoader()
   .equals(this.getClass().getClassLoader()))
{
if(null != logger)
logger.info("Log4j was loaded by application
classloader; shutting down.");

LogManager.shutdown();
}
else
{
if(null != logger)
logger.info("Log4j was loaded by some other
ClassLoader; not shutting down.");
}
}
}

Calling the PropertyConfigurator constructor causes that class to look
for log4j.properties in various places, including (due to the way the
WebappClassLoader works), WEB-INF/classes. It should also look in the
"top-level" of any application JAR files that are in WEB-INF/lib.

You said that "your JAR file contains log4j.properties". Usually
applications are packaged as WAR files (or exploded WAR directories).
Are you using embedded Tomcat or Spring Boot or anything like that?
Where is your JAR file located?

- -chris

> -Original Message- From: Ryan Palmer Sent: Tuesday,
> December 18, 2018 7:49 PM
> 
> Michael,
> 
> Tomcat uses JULI internally. Have you taken necessary steps to
> redirect JULI to log4j?
> 
> Thanks, Ryan
> 
>  From: Lemke, Michael ST/HZA-ZIC2
>  Sent: Tuesday, December 18, 2018 10:20
> AM To: Tomcat Users List Subject: RE: log4j app logging
> 
> On December 18, 2018 6:59 PM Ryan Palmer wrote:
>> 
>> The file needs to be named
>> log4j.properties<http://log4j.properties> (or .xml, .json, etc.)
>> and needs to be in the classpath. You ommitted the 'j'.
> 
> Thanks for spotting this. Unfortunately, this typo was only in the
> email:
> 
> pc# ls src/main/resources/ com  log4j.properties
> 
> 
> So for being in the classpath it is sufficient to have it packaged
> in the jar, isn't it?
> 
> Archive:  myapp-1.1.0-SNAPSHOT.jar Length   MethodSize  Cmpr
> DateTime   CRC-32   Name   --  --- 
> -- -    0  Stored0   0% 12-18-2018
> 16:56   META-INF/ 98  Defl:N   91   7% 12-18-2018 16:56
> 48730e36  META-INF/MANIFEST.MF 0  Stored0   0% 12-18-2018
> 16:56   META-INF/maven/ ... 0  Stored0   0%
> 12-18-2018 16:56   com/ ... 1123  Defl:N  451  60%
> 12-18-2018 16:56 eea5d81a  log4j.properties
> 
> It ought to be something simple but before further digging into my
> setup details I want to make sure there isn't something special for
> tomcat. Something in ${catalina.base}/conf or conflicts with
> tomcat's logging system.
> 
> 
>> On Dec 18, 2018, at 9:42 AM, "Lemke, Michael ST/HZA-ZIC2" wrote:
>> 
>> I have an old webapp that uses log4j 1.2 and which I am trying to
>> deploy on tomcat. For the heck of it I can't get tomcat to use
>> the log4.properties<http://log4.properties> file. What am I doing
>> wrong?
>> 
>> tomcat 9.0.6 is installed as a Windows service and does serve my
>> webapp, so the app is working fine. The project is mavenized, I
>> put log4.properties<http://log4.properties> to src/main/resources
>> and it ends up in the jar file of my application. Is there
>> anything special that needs to be done?
>> 
>> 
>> 
>> To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For
>> additional commands, e-mail: users-h...@tomcat.apache.org
>> 
> 
> -

Re: log4j app logging

[Christopher Schultz]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA256

Michael,

On 12/18/18 12:42, Lemke, Michael  ST/HZA-ZIC2 wrote:
> I have an old webapp that uses log4j 1.2 and which I am trying to 
> deploy on tomcat. For the heck of it I can't get tomcat to use the 
> log4.properties file. What am I doing wrong?

Are you trying to get Tomcat to use the log4j.properties file from
your application? If so, that's not going to work, because Tomcagt
starts up long before your application is loaded, and so the log4j.jar
file and log4j.properties file are not used at all.

Your *application* should be able to use log4j without any problems as
long as the log4j.jar file is in WEB-INB/lib and your log4j.properties
file is in (usually) WEB-INF/classes/log4j.properties.

> tomcat 9.0.6 is installed as a Windows service and does serve my 
> webapp, so the app is working fine. The project is mavenized, I
> put log4.properties to src/main/resources and it ends up in the jar
> file of my application. Is there anything special that needs to be
> done?

How are you initializing log4j?

- -chris
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RE: log4j app logging

[Lemke, Michael ST/HZA-ZIC2]

Thanks, Ryan, this JULI thing actually is what worries me. I don't care about 
tomcat's logging at the moment. It is my webapp's logging I can't figure out. 
It worked on other containers.

-Original Message-
From: Ryan Palmer
Sent: Tuesday, December 18, 2018 7:49 PM

Michael,

Tomcat uses JULI internally. Have you taken necessary steps to redirect JULI to 
log4j?

Thanks,
Ryan


From: Lemke, Michael ST/HZA-ZIC2 
Sent: Tuesday, December 18, 2018 10:20 AM
To: Tomcat Users List
Subject: RE: log4j app logging

On December 18, 2018 6:59 PM
Ryan Palmer wrote:
>
>The file needs to be named log4j.properties<http://log4j.properties> (or .xml, 
>.json, etc.) and needs to be in the classpath. You ommitted the 'j'.

Thanks for spotting this. Unfortunately, this typo was only in the email:

pc# ls src/main/resources/
com  log4j.properties


So for being in the classpath it is sufficient to have it packaged in the jar, 
isn't it?

Archive:  myapp-1.1.0-SNAPSHOT.jar
 Length   MethodSize  CmprDateTime   CRC-32   Name
  --  ---  -- -   
   0  Stored0   0% 12-18-2018 16:56   META-INF/
  98  Defl:N   91   7% 12-18-2018 16:56 48730e36  META-INF/MANIFEST.MF
   0  Stored0   0% 12-18-2018 16:56   META-INF/maven/
...
   0  Stored0   0% 12-18-2018 16:56   com/
...
1123  Defl:N  451  60% 12-18-2018 16:56 eea5d81a  log4j.properties

It ought to be something simple but before further digging into my setup 
details I want to make sure there isn't something special for tomcat. Something 
in ${catalina.base}/conf or conflicts with tomcat's logging system.


>On Dec 18, 2018, at 9:42 AM, "Lemke, Michael ST/HZA-ZIC2" wrote:
>
>I have an old webapp that uses log4j 1.2 and which I am trying to deploy on 
>tomcat. For the heck of it I can't get tomcat to use the 
>log4.properties<http://log4.properties> file. What am I doing wrong?
>
>tomcat 9.0.6 is installed as a Windows service and does serve my webapp, so 
>the app is working fine. The project is mavenized, I put 
>log4.properties<http://log4.properties> to src/main/resources and it ends up 
>in the jar file of my application. Is there anything special that needs to be 
>done?
>
>
>
>To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org
>For additional commands, e-mail: users-h...@tomcat.apache.org
>

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Re: log4j app logging

[Ryan Palmer]

Michael,

Tomcat uses JULI internally. Have you taken necessary steps to redirect JULI to 
log4j?

Thanks,
Ryan


From: Lemke, Michael ST/HZA-ZIC2 
Sent: Tuesday, December 18, 2018 10:20 AM
To: Tomcat Users List
Subject: RE: log4j app logging

On December 18, 2018 6:59 PM
Ryan Palmer wrote:
>
>The file needs to be named log4j.properties<http://log4j.properties> (or .xml, 
>.json, etc.) and needs to be in the classpath. You ommitted the 'j'.

Thanks for spotting this. Unfortunately, this typo was only in the email:

pc# ls src/main/resources/
com  log4j.properties


So for being in the classpath it is sufficient to have it packaged in the jar, 
isn't it?

Archive:  myapp-1.1.0-SNAPSHOT.jar
 Length   MethodSize  CmprDateTime   CRC-32   Name
  --  ---  -- -   
   0  Stored0   0% 12-18-2018 16:56   META-INF/
  98  Defl:N   91   7% 12-18-2018 16:56 48730e36  META-INF/MANIFEST.MF
   0  Stored0   0% 12-18-2018 16:56   META-INF/maven/
...
   0  Stored0   0% 12-18-2018 16:56   com/
...
1123  Defl:N  451  60% 12-18-2018 16:56 eea5d81a  log4j.properties

It ought to be something simple but before further digging into my setup 
details I want to make sure there isn't something special for tomcat. Something 
in ${catalina.base}/conf or conflicts with tomcat's logging system.


>On Dec 18, 2018, at 9:42 AM, "Lemke, Michael ST/HZA-ZIC2" wrote:
>
>I have an old webapp that uses log4j 1.2 and which I am trying to deploy on 
>tomcat. For the heck of it I can't get tomcat to use the 
>log4.properties<http://log4.properties> file. What am I doing wrong?
>
>tomcat 9.0.6 is installed as a Windows service and does serve my webapp, so 
>the app is working fine. The project is mavenized, I put 
>log4.properties<http://log4.properties> to src/main/resources and it ends up 
>in the jar file of my application. Is there anything special that needs to be 
>done?
>
>
>
>To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org
>For additional commands, e-mail: users-h...@tomcat.apache.org
>

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RE: log4j app logging

[Lemke, Michael ST/HZA-ZIC2]

On December 18, 2018 6:59 PM
Ryan Palmer wrote:
>
>The file needs to be named log4j.properties (or .xml, 
>.json, etc.) and needs to be in the classpath. You ommitted the 'j'.

Thanks for spotting this. Unfortunately, this typo was only in the email:

pc# ls src/main/resources/
com  log4j.properties


So for being in the classpath it is sufficient to have it packaged in the jar, 
isn't it?

Archive:  myapp-1.1.0-SNAPSHOT.jar
 Length   MethodSize  CmprDateTime   CRC-32   Name
  --  ---  -- -   
   0  Stored0   0% 12-18-2018 16:56   META-INF/
  98  Defl:N   91   7% 12-18-2018 16:56 48730e36  META-INF/MANIFEST.MF
   0  Stored0   0% 12-18-2018 16:56   META-INF/maven/
...
   0  Stored0   0% 12-18-2018 16:56   com/
...
1123  Defl:N  451  60% 12-18-2018 16:56 eea5d81a  log4j.properties

It ought to be something simple but before further digging into my setup 
details I want to make sure there isn't something special for tomcat. Something 
in ${catalina.base}/conf or conflicts with tomcat's logging system.


>On Dec 18, 2018, at 9:42 AM, "Lemke, Michael ST/HZA-ZIC2" wrote:
>
>I have an old webapp that uses log4j 1.2 and which I am trying to deploy on 
>tomcat. For the heck of it I can't get tomcat to use the 
>log4.properties file. What am I doing wrong?
>
>tomcat 9.0.6 is installed as a Windows service and does serve my webapp, so 
>the app is working fine. The project is mavenized, I put 
>log4.properties to src/main/resources and it ends up 
>in the jar file of my application. Is there anything special that needs to be 
>done?
>
>
>
>To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org
>For additional commands, e-mail: users-h...@tomcat.apache.org
>

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Re: log4j app logging

[Ryan Palmer]

Michael,

The file needs to be named log4j.properties (or .xml, 
.json, etc.) and needs to be in the classpath. You ommitted the 'j'.

Sent from BlueMail
On Dec 18, 2018, at 9:42 AM, "Lemke, Michael ST/HZA-ZIC2" 
mailto:lemke...@schaeffler.com>> wrote:

I have an old webapp that uses log4j 1.2 and which I am trying to deploy on 
tomcat. For the heck of it I can't get tomcat to use the 
log4.properties file. What am I doing wrong?

tomcat 9.0.6 is installed as a Windows service and does serve my webapp, so the 
app is working fine. The project is mavenized, I put 
log4.properties to src/main/resources and it ends up in 
the jar file of my application. Is there anything special that needs to be done?



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