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https://issues.apache.org/jira/browse/LOG4J2-2480?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Stefano Rocca updated LOG4J2-2480:
----------------------------------
Environment:
Windows 10
JDK 1.8.0_144
Tomcat 8.0.36
Log4j2 2.11.1
was:
We're using:
Windows 10
JDK 1.8.0_144
Tomcat 8.0.36
Log4j2 2.11.1
Priority: Minor (was: Critical)
Description:
Hi,
we'd like to use a servlet init parameter inside the log4jConfiguration
parameter like this (web.xml):
{{ <context-param>}}
{{ <description>Log4j config location</description>}}
{{ <param-name>log4jConfiguration</param-name>}}
{{
<param-value>${web:initParam.config.folder}/log4j2_ui.xml</param-value>}}
{{ </context-param>}}
where config.folder is a servlet init parameter (defined in context.xml).
Looking at org.apache.logging.log4j.web.Log4jWebInitializerImpl we have seen at
line 104 that it is possible to use variable substitution inside
log4jConfiguration
{{final String location = this.substitutor.replace(this.servletContext}}
{{ .getInitParameter(LOG4J_CONFIG_LOCATION));}}
but in our case it does not work: we see that it recognizes the variable and it
tries to lookup the value in the servlet context but in the following method of
org.apache.logging.log4j.web.WebLookup, at line 35 ctx is null
{{ public String lookup(final LogEvent event, final String key) {}}
{{ final ServletContext ctx =
WebLoggerContextUtils.getServletContext(); {color:#ff0000}<-- returns
null!{color}}}
{{ if (ctx == null) {}}
{{ return null; {color:#ff0000}<-- exits{color}}}
Thanks in advance.
Stefano
was:
Hi,
we'd like to use a servlet init parameter inside the log4jConfiguration
parameter like this (web.xml):
{{ <context-param>}}
{{ <description>Log4j config location</description>}}
{{ <param-name>log4jConfiguration</param-name>}}
{{
<param-value>${web:initParam.config.folder}/log4j2_ui.xml</param-value>}}
{{ </context-param>}}
where config.folder is a servlet init parameter (defined in context.xml).
Looking at org.apache.logging.log4j.web.Log4jWebInitializerImpl we have seen at
line 104 that it is possible to use variable substitution inside
log4jConfiguration
{{final String location = this.substitutor.replace(this.servletContext}}
{{ .getInitParameter(LOG4J_CONFIG_LOCATION));}}
but in our case it does not work: we see that it recognizes the variable and it
tries to lookup the value in the servlet context but in the following method of
org.apache.logging.log4j.web.WebLookup, at line 35 ctx is null
{{ public String lookup(final LogEvent event, final String key) {}}
{{ final ServletContext ctx = WebLoggerContextUtils.getServletContext();
{color:#FF0000}<-- returns null!{color}}}
{{ if (ctx == null) {}}
{{ return null; {color:#FF0000}<-- exits{color}}}
{{ }}}
Thanks in advance.
Stefano
> WebLookup not working in log4jConfiguration parameter
> -----------------------------------------------------
>
> Key: LOG4J2-2480
> URL: https://issues.apache.org/jira/browse/LOG4J2-2480
> Project: Log4j 2
> Issue Type: Bug
> Components: Web/Servlet
> Affects Versions: 2.11.1
> Environment: Windows 10
> JDK 1.8.0_144
> Tomcat 8.0.36
> Log4j2 2.11.1
> Reporter: Stefano Rocca
> Priority: Minor
>
> Hi,
> we'd like to use a servlet init parameter inside the log4jConfiguration
> parameter like this (web.xml):
> {{ <context-param>}}
> {{ <description>Log4j config location</description>}}
> {{ <param-name>log4jConfiguration</param-name>}}
> {{
> <param-value>${web:initParam.config.folder}/log4j2_ui.xml</param-value>}}
> {{ </context-param>}}
> where config.folder is a servlet init parameter (defined in context.xml).
> Looking at org.apache.logging.log4j.web.Log4jWebInitializerImpl we have seen
> at line 104 that it is possible to use variable substitution inside
> log4jConfiguration
> {{final String location = this.substitutor.replace(this.servletContext}}
> {{ .getInitParameter(LOG4J_CONFIG_LOCATION));}}
> but in our case it does not work: we see that it recognizes the variable and
> it tries to lookup the value in the servlet context but in the following
> method of org.apache.logging.log4j.web.WebLookup, at line 35 ctx is null
> {{ public String lookup(final LogEvent event, final String key) {}}
> {{ final ServletContext ctx =
> WebLoggerContextUtils.getServletContext(); {color:#ff0000}<-- returns
> null!{color}}}
> {{ if (ctx == null) {}}
> {{ return null; {color:#ff0000}<-- exits{color}}}
> Thanks in advance.
> Stefano
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