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From Gerald <gerald...@yahoo.com.sg>
Subject Re: log4j.properties gets loaded twice causing rollling to fail
Date Mon, 14 Jul 2014 14:45:23 GMT
Hi Jake, 

Thank you for the inputs/ advise.
I will look into fixing it with your suggestions.

Dear all, 

also thank you for reading my earlier posts and suggestions.

> On 14 Jul, 2014, at 10:39 pm, "Jacob Kjome" <hoju@visi.com> wrote:
> 
> No.  More likely, there some code in your app performing manual configuration.
> 
> Jake
> 
> 
> On Sun, 13 Jul 2014 16:31:35 +0800
>  Gerald <geraldlsg@yahoo.com.sg> wrote:
>> Hi so in my case, because log4j.properties was not found in my webapps WEB-INF/classes,
the webapp classloader then went to look for the log4j.properties in my tomcat. this second
reloading causes the rolling to fail. I see that subsequently the log4j.properties of my webapp
(in WEB-INF/classes/properties) was loaded towards the end, so can I infer the following?
>> The webapp classloader first tries to load all config files in WEB-INF/classes,and
because log4j properties was not found , then goes back to (re)load log4j.properties in the
tomcat's lib and then comes back to WEB-INF/classes/* to load the remaining configs? and since
the log4j.properties was found in WEB-INF/classes/properties it was eventually loaded.
>> Regards.
>>> On Sun 13 Jul, 2014, at 12:24 pm, "Jacob Kjome" <hoju@visi.com> wrote:
>>> Because Log4j, by default, looks for config files in the default package. Furthermore,
because of Tomcat's child-first classloading behavior, if you place log4j.properties in the
default package of the webapp (WEB-INF/classes) it won't bother looking in the parent classloader
since it will have already found the config file in the webapp classloader.
>>> Note, however, that log4j.xml takes precedence over log4j.properties.  So, if
you have log4j.xml in Tomcat's classpath (in the default package), then even if you have log4j.properties
in the webapp classpath, it will use log4j.xml from the server classpath.  If that case, you'd
need log4j.xml in the webapp's default package to override the server's log4j.xml.  Just thought
I'd point that out.
>>> Jake
>>> On Sun, 13 Jul 2014 00:04:26 +0800
>>>   Gerald <geraldlsg@yahoo.com.sg> wrote:
>>>> Hi Could I trouble you to explain further why putting the application log4j.properties
in WEB-INF/classes, as opposed to WEB-INF/classes/properties, would prevent the webapp classloader
from seeing the tomcat's log4j.properties?
>>>> Gerald
>>>>> On 11 Jul, 2014, at 11:27 pm, "Jacob Kjome" <hoju@visi.com> wrote:
>>>>> Why don't you place your webapp's log4j.properties file in WEB-INF/classes
instead of WEB-INF/classes/properties?  That way, the webapp classloader won't ever see the
tomcat log4j.properties, thus no rolling file appender conflicts.
>>>>> Jake
>>>>> On Fri, 11 Jul 2014 11:16:41 +0800
>>>>>    guowei <geraldlsg@yahoo.com.sg> wrote:
>>>>>> Dear all,
>>>>>> I am using log4j for tomcat internal logging and also application
logging.
>>>>>> I followed Tomcat's instruction to configure log4j rolling and I
also have configured my application to have its own log4j rolling.
>>>>>> log4j.jar is in both Tomcat's lib and web application's lib, each
have their respective log4j.properties
>>>>>> I enabled -Dlog4j.debug and I can see the sequence of the events
>>>>>> 1) log4j.properties for the tomcat gets loaded by Tomcat's StandardClassLoader
>>>>>> 2) the same log4j.properties for tomcat gets loaded by the Tomcat's
WebappClassLoader
>>>>>> 3) application's log4j.properties is loaded
>>>>>> Between 1) and 2) I can see the tomcat files being rolled ( I intentionally
set DailyRollingAppender to yyyy-MM-dd-HH-mm and DEBUG level to make sure lots of things gets
logged). Rolling was working well. Files were rolled on the minute
>>>>>> However, when step 2) kicks in, the rolling of tomcat files failed.
I reckon that the moment the the same log4j.properties is loaded, there is a conflict since
the same appenders are referred twice.
>>>>>> I am not certain has it anything to do with the tomcat's log4j configuration
or appliation's log4j configuration. The Application's log files are rolled correctly.
>>>>>> Would appreciate if anyone can enlighten me.
>>>>>> -----Dlog4j.debug output----
>>>>>> log4j: Trying to find [log4j.xml] using context classloader org.apache.catalina.loader.StandardClassLoader@1529d183.
>>>>>> log4j: Trying to find [log4j.xml] using org.apache.catalina.loader.StandardClassLoader@1529d183
class loader.
>>>>>> log4j: Trying to find [log4j.xml] using ClassLoader.getSystemResource().
>>>>>> log4j: Trying to find [log4j.properties] using context classloader
org.apache.catalina.loader.StandardClassLoader@1529d183.
>>>>>> log4j: Using URL [file:/C:\Apache\Tomcat/lib/log4j.properties] for
automatic log4j configuration.
>>>>>> log4j: Reading configuration from URL file:/C:\Apache\Tomcat/lib/log4j.properties
>>>>>> log4j: Parsing for [root] with value=[WARN,CATALINA,LOCALHOST,MANAGER,HOST-MANAGER,stdout,stderr].
>>>>>> log4j: Level token is [WARN].
>>>>>> log4j: Category root set to WARN
>>>>>> log4j: Parsing appender named "CATALINA".
>>>>>> log4j: Parsing layout options for "CATALINA".
>>>>>> log4j: Setting property [conversionPattern] to [%d [%t] %-5p %c-
%m%n].
>>>>>> log4j: End of parsing for "CATALINA".
>>>>>> log4j: Setting property [encoding] to [UTF-8].
>>>>>> log4j: Setting property [datePattern] to ['.'yyyy-MM-dd-HH-mm'.log'].
>>>>>> log4j: Setting property [file] to [C:\Apache\Tomcat/logs/catalina].
>>>>>> log4j: Setting property [append] to [true].
>>>>>> log4j: setFile called: C:\Apache\Tomcat/logs/catalina, true
>>>>>> log4j: setFile ended
>>>>>> log4j: Appender [CATALINA] to be rolled on top of every minute.
>>>>>> log4j: Parsed "CATALINA" options.
>>>>>> log4j: Handling log4j.additivity.org.apache.catalina.core.ContainerBase.[Catalina].[localhost]=[null]
>>>>>> log4j: Finished configuring.
>>>>>> .
>>>>>> .
>>>>>> #Parsing for rest of the file
>>>>>> .
>>>>>> .
>>>>>> log4j: Parsing for [org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[host-manager]]
with value=[WARN, HOST-MANAGER].
>>>>>> log4j: Level token is [WARN].
>>>>>> log4j: Category org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[host-manager]
set to WARN
>>>>>> log4j: Parsing appender named "HOST-MANAGER".
>>>>>> delegate: false
>>>>>>     repositories:
>>>>>>       /WEB-INF/classes/
>>>>>> ----------> Parent Classloader:
>>>>>> org.apache.catalina.loader.StandardClassLoader@6c79fa4f
>>>>>> .
>>>>>> log4j: Trying to find [log4j.xml] using WebappClassLoader
>>>>>>     context: /mya
>>>>>>     delegate: false
>>>>>>     repositories:
>>>>>>       /WEB-INF/classes/
>>>>>> ----------> Parent Classloader:
>>>>>> org.apache.catalina.loader.StandardClassLoader@6c79fa4f
>>>>>> class loader.
>>>>>> log4j: Trying to find [log4j.xml] using ClassLoader.getSystemResource().
>>>>>> log4j: Trying to find [log4j.properties] using context classloader
WebappClassLoader
>>>>>>     context: /mya
>>>>>>     delegate: false
>>>>>>     repositories:
>>>>>>       /WEB-INF/classes/
>>>>>> ----------> Parent Classloader:
>>>>>> org.apache.catalina.loader.StandardClassLoader@6c79fa4f
>>>>>> .
>>>>>> log4j: Using URL [file://C:\Apache\Tomcat/lib/log4j.properties] for
automatic log4j configuration.
>>>>>> log4j: Using URL [file:/C:\Apache\Tomcat/lib/log4j.properties] for
automatic log4j configuration.
>>>>>> log4j: log4j: Parsing for [root] with value=[WARN,CATALINA,LOCALHOST,MANAGER,HOST-MANAGER,stdout,stderr].
>>>>>> log4j: Level token is [WARN].
>>>>>> Reading configuration from URL file:/C:\Apache\Tomcat/lib/log4j.properties
>>>>>> log4j: Category root set to WARN
>>>>>> log4j: Parsing appender named "CATALINA".
>>>>>> log4j: Parsing layout options for "CATALINA".
>>>>>> log4j: Setting property [conversionPattern] to [%d [%t] %-5p %c-
%m%n].
>>>>>> log4j: End of parsing for "CATALINA".
>>>>>> log4j: Setting property [encoding] to [UTF-8].
>>>>>> log4j: Setting property [datePattern] to ['.'yyyy-MM-dd-HH-mm'.log'].
>>>>>> log4j: Setting property [file] to [C:\Apache\Tomcat/logs/catalina].
>>>>>> log4j: Setting property [append] to [true].
>>>>>> log4j: setFile called: C:\Apache\Tomcat/logs/catalina, true
>>>>>> log4j: setFile ended
>>>>>> log4j: Appender [CATALINA] to be rolled on top of every minute.
>>>>>> log4j: Parsed "CATALINA" options.
>>>>>> log4j: Handling log4j.additivity.org.apache.catalina.core.ContainerBase.[Catalina].[localhost]=[null]
>>>>>> log4j: Finished configuring.
>>>>>> .
>>>>>> .
>>>>>> #Parsing for rest of the appenders
>>>>>> .
>>>>>> .
>>>>>> log4j: Parsing for [org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[host-manager]]
with value=[WARN, HOST-MANAGER].
>>>>>> log4j: Level token is [WARN].
>>>>>> log4j: Category org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[host-manager]
set to WARN
>>>>>> log4j: Parsing appender named "HOST-MANAGER".
>>>>>> .
>>>>>> .
>>>>>> .
>>>>>> log4j: Reading configuration from URL file:/C:\Apache\Tomcat/webapps/mya/WEB-INF/classes/properties/log4j.properties
>>>>>> log4j: Parsing for [org] with value=[INFO, DA, stdout].
>>>>>> log4j: Level token is [INFO].
>>>>>> log4j: Category org set to INFO
>>>>>> log4j: Parsing appender named "DA".
>>>>>> log4j: Parsing layout options for "DA".
>>>>>> log4j: Setting property [conversionPattern] to [%-5p [%t] [%X{userID}]
%d{dd-MM-yyyy HH:mm:ss:SSS} [%30c{1}] - %m  %n].
>>>>>> log4j: End of parsing for "DA".
>>>>>> log4j: Setting property [append] to [true].
>>>>>> log4j: Setting property [file] to [C:\Apache\Tomcat/logs/mya.log].
>>>>>> log4j: Setting property [datePattern] to ['.'yyyy-MM-dd-HH].
>>>>>> log4j: setFile called: C:\Apache\Tomcat/logs/mya.log, true
>>>>>> log4j: setFile ended
>>>>>> log4j: Appender [DA] to be rolled on top of every hour.
>>>>>> log4j: Parsed "DA" options.
>>>>>> log4j: Parsing appender named "stdout".
>>>>>> log4j: Parsing layout options for "stdout".
>>>>>> log4j: Setting property [conversionPattern] to [%-5p [%t] [%X{userID}]
%d{dd-MM-yyyy HH:mm:ss:SSS} [%30c{1}] - %m  %n].
>>>>>> log4j: End of parsing for "stdout".
>>>>>> log4j: Parsed "stdout" options.
>>>>>> log4j: Handling log4j.additivity.org=[null]
>>>>>> .
>>>>>> .
>>>>>> .
>>>>>> #parsing of the application's log4j
>>>>>> .
>>>>>> .
>>>>>> .
>>>>>> log4j:ERROR Failed to rename [C:\Apache\Tomcat/logs/catalina] to
[C:\Apache\Tomcat/logs/catalina.2014-07-10-17-09-20.log].
>>>>>> log4j:ERROR Failed to rename [C:\Apache\Tomcat/logs/localhost] to
[C:\Apache\Tomcat/logs/localhost.2014-07-10-17-09-20.log].
>>>>>> log4j:ERROR Failed to rename [C:\Apache\Tomcat/logs/manager] to [C:\Apache\Tomcat/logs/manager.2014-07-10-17-09-20.log].
>>>>>> log4j:ERROR Failed to rename [C:\Apache\Tomcat/logs/host-manager]
to [C:\Apache\Tomcat/logs/host-manager.2014-07-10-17-09-20.log].
>>>>>> log4j:ERROR Failed to rename [C:\Apache\Tomcat/logs/stdout] to [C:\Apache\Tomcat/logs/stdout.2014-07-10-17-09-20.log].
>>>>>> log4j:ERROR Failed to rename [C:\Apache\Tomcat/logs/stderr] to [C:\Apache\Tomcat/logs/stderr.2014-07-10-17-09-20.log].
>>>>>> ----------------------------------
>>>>>> ----tomcat log4j properties----
>>>>>> log4j.rootLogger=INFO,CATALINA,LOCALHOST,MANAGER,HOST-MANAGER,stdout,stderr
>>>>>> # Define all the appenders
>>>>>> log4j.appender.CATALINA=org.apache.log4j.DailyRollingFileAppender
>>>>>> log4j.appender.CATALINA.File=${catalina.base}/logs/catalina
>>>>>> log4j.appender.CATALINA.Append=true
>>>>>> log4j.appender.CATALINA.Encoding=UTF-8
>>>>>> log4j.appender.CATALINA.DatePattern = '.'yyyy-MM-dd-HH-mm'.log'
>>>>>> log4j.appender.CATALINA.layout = org.apache.log4j.PatternLayout
>>>>>> log4j.appender.CATALINA.layout.ConversionPattern = %d [%t] %-5p %c-
%m%n
>>>>>> .
>>>>>> .
>>>>>> .
>>>>>> log4j.appender.stdout=org.apache.log4j.DailyRollingFileAppender
>>>>>> log4j.appender.stdout.File=${catalina.base}/logs/stdout
>>>>>> log4j.appender.stdout.Append=true
>>>>>> log4j.appender.stdout.Encoding=UTF-8
>>>>>> log4j.appender.stdout.DatePattern = '.'yyyy-MM-dd-HH-mm'.log'
>>>>>> log4j.appender.stdout.layout = org.apache.log4j.PatternLayout
>>>>>> log4j.appender.stdout.layout.ConversionPattern = %d [%t] %-5p %c-
%m%n
>>>>>> # Configure which loggers log to which appenders
>>>>>> log4j.logger.org.apache.catalina.core.ContainerBase.[Catalina].[localhost]=DEBUG,
CATALINA
>>>>>> log4j.logger.org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[\manager]=DEBUG,
MANAGER
>>>>>> log4j.logger.org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[\host-manager]=DEBUG,
HOST-MANAGER
>>>>>> --------end tomcat log4j properties----
>>>>>> ---my application's log4j---
>>>>>> log4j.log.dir=${catalina.home}/logs
>>>>>> #Application Log
>>>>>> log4j.logger.ou.org.to=ALL, DA, stdout
>>>>>> log4j.logger.aud=ALL,AudAppender, stdout
>>>>>> log4j.logger.ou.org.to.osf.core.aop.MethodTrace=ALL, MethodTraceAppender,
stdout
>>>>>> log4j.logger.ou.org.to.osf.core.aop.PerfMonitor=ALL, PerfAppender,
stdout
>>>>>> log4j.appender.stdout=org.apache.log4j.ConsoleAppender
>>>>>> log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
>>>>>> log4j.appender.stdout.layout.ConversionPattern=%-5p [%t] [%X{userID}]
%d{dd-MM-yyyy HH:mm:ss:SSS} [%30c{1}] - %m  %n
>>>>>> log4j.appender.DA=org.apache.log4j.DailyRollingFileAppender
>>>>>> log4j.appender.DA.file=${log4j.log.dir}/mya.log
>>>>>> log4j.appender.DA.layout=org.apache.log4j.PatternLayout
>>>>>> log4j.appender.DA.layout.ConversionPattern=%-5p [%t] [%X{userID}]
%d{dd-MM-yyyy HH:mm:ss:SSS} [%30c{1}] - %m  %n
>>>>>> log4j.appender.DA.DatePattern='.'yyyy-MM-dd-HH
>>>>>> log4j.appender.DA.append=true
>>>>>> --------------------------------------
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