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It looks like Spring framework's Log4jConfigListener is having an issue when webapp is deployed as WAR. Log4jConfigListener is defined in web.xml. I got the below error while deploying the application in weblogic 10.3.
weblogic.management.DeploymentException: Cannot set web app root system property when WAR file is not expanded - with nested exception: [java.lang.IllegalStateException: Cannot set web app root system property when WAR file is not expanded].
The solution is deploy the WAR as exploded or don't use Log4jConfigListener. The spring framework documentation also says the WAR should be exploded.
There is some update here. There is a solution available to this without any code change. We just need to set "Archived Real Path Enabled" option checked. Please check this blog entry on how to enable.
Useful Links:
To read more articles on Weblogic, please click here.
Showing posts with label log4j. Show all posts
Showing posts with label log4j. Show all posts
How to change log4j log levels at runtime?
Here is the source code for log4jAdmin.jsp. I have copied under root of my WAR. Once you deployed the WAR, you can change the log levels on the fly without bouncing the servers. Remember you should have configured log4j in your applications properly. Please follow this link if you have any trouble in configuring log4j.
Once you copy this log4jAdmin.jsp under root of your web app, you can access it by entering
http://host_name:port/webapp/log4jAdmin.jsp
log4jAdmin.jsp:
<%@ page language="java" contentType="text/html;charset=UTF-8" %>
<%@ page import="org.apache.log4j.Level" %>
<%@ page import="org.apache.log4j.LogManager" %>
<%@ page import="org.apache.log4j.Logger" %>
<%@ page import="java.util.HashMap" %>
<%@ page import="java.util.Enumeration" %>
<%@ page import="java.util.Set" %>
<%@ page import="java.util.Arrays" %>
<% long beginPageLoadTime = System.currentTimeMillis();%>
<html>
<head>
<title>Log4J Administration</title>
<style type="text/css">
<!--
#content {
margin: 0px;
padding: 0px;
text-align: center;
background-color: #ccc;
border: 1px solid #000;
width: 100%;
}
body {
position: relative;
margin: 10px;
padding: 0px;
color: #333;
}
h1 {
margin-top: 20px;
font: 1.5em Verdana, Arial, Helvetica sans-serif;
}
h2 {
margin-top: 10px;
font: 0.75em Verdana, Arial, Helvetica sans-serif;
text-align: left;
}
a, a:link, a:visited, a:active {
color: red;
text-decoration: none;
text-transform: uppercase;
}
table {
width: 100%;
background-color: #000;
padding: 3px;
border: 0px;
}
th {
font-size: 0.75em;
background-color: #ccc;
color: #000;
padding-left: 5px;
text-align: center;
border: 1px solid #ccc;
white-space: nowrap;
}
td {
font-size: 0.75em;
background-color: #fff;
white-space: nowrap;
}
td.center {
font-size: 0.75em;
background-color: #fff;
text-align: center;
white-space: nowrap;
}
.filterForm {
font-size: 0.9em;
background-color: #000;
color: #fff;
padding-left: 5px;
text-align: left;
border: 1px solid #000;
white-space: nowrap;
}
.filterText {
font-size: 0.75em;
background-color: #fff;
color: #000;
text-align: left;
border: 1px solid #ccc;
white-space: nowrap;
}
.filterButton {
font-size: 0.75em;
background-color: #000;
color: #fff;
padding-left: 5px;
padding-right: 5px;
text-align: center;
border: 1px solid #ccc;
width: 100px;
white-space: nowrap;
}
-->
</style>
</head>
<body onLoad="javascript:document.logFilterForm.logNameFilter.focus();">
<%
String containsFilter = "Contains";
String beginsWithFilter = "Begins With";
String[] logLevels = {"debug", "info", "warn", "error", "fatal", "off"};
String targetOperation = (String) request.getParameter("operation");
String targetLogger = (String) request.getParameter("logger");
String targetLogLevel = (String) request.getParameter("newLogLevel");
String logNameFilter = (String) request.getParameter("logNameFilter");
String logNameFilterType = (String) request.getParameter("logNameFilterType");
%>
<div id="content">
<h1>Log4J Administration</h1>
<div class="filterForm">
<form action="log4jAdmin.jsp" name="logFilterForm">Filter Loggers:
<input name="logNameFilter" type="text" size="50" value="<%=(logNameFilter == null ? "":logNameFilter)%>"
class="filterText"/>
<input name="logNameFilterType" type="submit" value="<%=beginsWithFilter%>" class="filterButton"/>
<input name="logNameFilterType" type="submit" value="<%=containsFilter%>" class="filterButton"/>
<input name="logNameClear" type="button" value="Clear" class="filterButton"
onmousedown='javascript:document.logFilterForm.logNameFilter.value="";'/>
<input name="logNameReset" type="reset" value="Reset" class="filterButton"/>
<param name="operation" value="changeLogLevel"/>
</form>
</div>
<table cellspacing="1">
<tr>
<th width="25%">Logger</th>
<th width="25%">Parent Logger</th>
<th width="15%">Effective Level</th>
<th width="35%">Change Log Level To</th>
</tr>
<%
Enumeration loggers = LogManager.getCurrentLoggers();
HashMap loggersMap = new HashMap(128);
Logger rootLogger = LogManager.getRootLogger();
if (!loggersMap.containsKey(rootLogger.getName())) {
loggersMap.put(rootLogger.getName(), rootLogger);
}
while (loggers.hasMoreElements()) {
Logger logger = (Logger) loggers.nextElement();
if (logNameFilter == null || logNameFilter.trim().length() == 0) {
loggersMap.put(logger.getName(), logger);
} else if (containsFilter.equals(logNameFilterType)) {
if (logger.getName().toUpperCase().indexOf(logNameFilter.toUpperCase()) >= 0) {
loggersMap.put(logger.getName(), logger);
}
} else {
// Either was no filter in IF, contains filter in ELSE IF, or begins with in ELSE
if (logger.getName().startsWith(logNameFilter)) {
loggersMap.put(logger.getName(), logger);
}
}
}
Set loggerKeys = loggersMap.keySet();
String[] keys = new String[loggerKeys.size()];
keys = (String[]) loggerKeys.toArray(keys);
Arrays.sort(keys, String.CASE_INSENSITIVE_ORDER);
for (int i = 0; i < keys.length; i++) {
Logger logger = (Logger) loggersMap.get(keys[i]);
// MUST CHANGE THE LOG LEVEL ON LOGGER BEFORE GENERATING THE LINKS AND THE
// CURRENT LOG LEVEL OR DISABLED LINK WON'T MATCH THE NEWLY CHANGED VALUES
if ("changeLogLevel".equals(targetOperation) && targetLogger.equals(logger.getName())) {
Logger selectedLogger = (Logger) loggersMap.get(targetLogger);
selectedLogger.setLevel(Level.toLevel(targetLogLevel));
}
String loggerName = null;
String loggerEffectiveLevel = null;
String loggerParent = null;
if (logger != null) {
loggerName = logger.getName();
loggerEffectiveLevel = String.valueOf(logger.getEffectiveLevel());
loggerParent = (logger.getParent() == null ? null : logger.getParent().getName());
}
%>
<tr>
<td><%=loggerName%>
</td>
<td><%=loggerParent%>
</td>
<td><%=loggerEffectiveLevel%>
</td>
<td class="center">
<%
for (int cnt = 0; cnt < logLevels.length; cnt++) {
String url = "log4jAdmin.jsp?operation=changeLogLevel&logger=" + loggerName + "&newLogLevel=" + logLevels[cnt] + "&logNameFilter=" + (logNameFilter != null ? logNameFilter : "") + "&logNameFilterType=" + (logNameFilterType != null ? logNameFilterType : "");
if (logger.getLevel() == Level.toLevel(logLevels[cnt]) || logger.getEffectiveLevel() == Level.toLevel(logLevels[cnt])) {
%>
[<%=logLevels[cnt].toUpperCase()%>]
<%
} else {
%>
<a href='<%=url%>'>[<%=logLevels[cnt]%>]</a>
<%
}
}
%>
</td>
</tr>
<%
}
%>
</table>
<h2>
Revision: 1.0<br/>
Page Load Time (Millis): <%=(System.currentTimeMillis() - beginPageLoadTime)%>
</h2>
</div>
</body>
</html>
Once you copy this log4jAdmin.jsp under root of your web app, you can access it by entering
http://host_name:port/webapp/log4jAdmin.jsp
log4jAdmin.jsp:
<%@ page language="java" contentType="text/html;charset=UTF-8" %>
<%@ page import="org.apache.log4j.Level" %>
<%@ page import="org.apache.log4j.LogManager" %>
<%@ page import="org.apache.log4j.Logger" %>
<%@ page import="java.util.HashMap" %>
<%@ page import="java.util.Enumeration" %>
<%@ page import="java.util.Set" %>
<%@ page import="java.util.Arrays" %>
<% long beginPageLoadTime = System.currentTimeMillis();%>
<html>
<head>
<title>Log4J Administration</title>
<style type="text/css">
<!--
#content {
margin: 0px;
padding: 0px;
text-align: center;
background-color: #ccc;
border: 1px solid #000;
width: 100%;
}
body {
position: relative;
margin: 10px;
padding: 0px;
color: #333;
}
h1 {
margin-top: 20px;
font: 1.5em Verdana, Arial, Helvetica sans-serif;
}
h2 {
margin-top: 10px;
font: 0.75em Verdana, Arial, Helvetica sans-serif;
text-align: left;
}
a, a:link, a:visited, a:active {
color: red;
text-decoration: none;
text-transform: uppercase;
}
table {
width: 100%;
background-color: #000;
padding: 3px;
border: 0px;
}
th {
font-size: 0.75em;
background-color: #ccc;
color: #000;
padding-left: 5px;
text-align: center;
border: 1px solid #ccc;
white-space: nowrap;
}
td {
font-size: 0.75em;
background-color: #fff;
white-space: nowrap;
}
td.center {
font-size: 0.75em;
background-color: #fff;
text-align: center;
white-space: nowrap;
}
.filterForm {
font-size: 0.9em;
background-color: #000;
color: #fff;
padding-left: 5px;
text-align: left;
border: 1px solid #000;
white-space: nowrap;
}
.filterText {
font-size: 0.75em;
background-color: #fff;
color: #000;
text-align: left;
border: 1px solid #ccc;
white-space: nowrap;
}
.filterButton {
font-size: 0.75em;
background-color: #000;
color: #fff;
padding-left: 5px;
padding-right: 5px;
text-align: center;
border: 1px solid #ccc;
width: 100px;
white-space: nowrap;
}
-->
</style>
</head>
<body onLoad="javascript:document.logFilterForm.logNameFilter.focus();">
<%
String containsFilter = "Contains";
String beginsWithFilter = "Begins With";
String[] logLevels = {"debug", "info", "warn", "error", "fatal", "off"};
String targetOperation = (String) request.getParameter("operation");
String targetLogger = (String) request.getParameter("logger");
String targetLogLevel = (String) request.getParameter("newLogLevel");
String logNameFilter = (String) request.getParameter("logNameFilter");
String logNameFilterType = (String) request.getParameter("logNameFilterType");
%>
<div id="content">
<h1>Log4J Administration</h1>
<div class="filterForm">
<form action="log4jAdmin.jsp" name="logFilterForm">Filter Loggers:
<input name="logNameFilter" type="text" size="50" value="<%=(logNameFilter == null ? "":logNameFilter)%>"
class="filterText"/>
<input name="logNameFilterType" type="submit" value="<%=beginsWithFilter%>" class="filterButton"/>
<input name="logNameFilterType" type="submit" value="<%=containsFilter%>" class="filterButton"/>
<input name="logNameClear" type="button" value="Clear" class="filterButton"
onmousedown='javascript:document.logFilterForm.logNameFilter.value="";'/>
<input name="logNameReset" type="reset" value="Reset" class="filterButton"/>
<param name="operation" value="changeLogLevel"/>
</form>
</div>
<table cellspacing="1">
<tr>
<th width="25%">Logger</th>
<th width="25%">Parent Logger</th>
<th width="15%">Effective Level</th>
<th width="35%">Change Log Level To</th>
</tr>
<%
Enumeration loggers = LogManager.getCurrentLoggers();
HashMap loggersMap = new HashMap(128);
Logger rootLogger = LogManager.getRootLogger();
if (!loggersMap.containsKey(rootLogger.getName())) {
loggersMap.put(rootLogger.getName(), rootLogger);
}
while (loggers.hasMoreElements()) {
Logger logger = (Logger) loggers.nextElement();
if (logNameFilter == null || logNameFilter.trim().length() == 0) {
loggersMap.put(logger.getName(), logger);
} else if (containsFilter.equals(logNameFilterType)) {
if (logger.getName().toUpperCase().indexOf(logNameFilter.toUpperCase()) >= 0) {
loggersMap.put(logger.getName(), logger);
}
} else {
// Either was no filter in IF, contains filter in ELSE IF, or begins with in ELSE
if (logger.getName().startsWith(logNameFilter)) {
loggersMap.put(logger.getName(), logger);
}
}
}
Set loggerKeys = loggersMap.keySet();
String[] keys = new String[loggerKeys.size()];
keys = (String[]) loggerKeys.toArray(keys);
Arrays.sort(keys, String.CASE_INSENSITIVE_ORDER);
for (int i = 0; i < keys.length; i++) {
Logger logger = (Logger) loggersMap.get(keys[i]);
// MUST CHANGE THE LOG LEVEL ON LOGGER BEFORE GENERATING THE LINKS AND THE
// CURRENT LOG LEVEL OR DISABLED LINK WON'T MATCH THE NEWLY CHANGED VALUES
if ("changeLogLevel".equals(targetOperation) && targetLogger.equals(logger.getName())) {
Logger selectedLogger = (Logger) loggersMap.get(targetLogger);
selectedLogger.setLevel(Level.toLevel(targetLogLevel));
}
String loggerName = null;
String loggerEffectiveLevel = null;
String loggerParent = null;
if (logger != null) {
loggerName = logger.getName();
loggerEffectiveLevel = String.valueOf(logger.getEffectiveLevel());
loggerParent = (logger.getParent() == null ? null : logger.getParent().getName());
}
%>
<tr>
<td><%=loggerName%>
</td>
<td><%=loggerParent%>
</td>
<td><%=loggerEffectiveLevel%>
</td>
<td class="center">
<%
for (int cnt = 0; cnt < logLevels.length; cnt++) {
String url = "log4jAdmin.jsp?operation=changeLogLevel&logger=" + loggerName + "&newLogLevel=" + logLevels[cnt] + "&logNameFilter=" + (logNameFilter != null ? logNameFilter : "") + "&logNameFilterType=" + (logNameFilterType != null ? logNameFilterType : "");
if (logger.getLevel() == Level.toLevel(logLevels[cnt]) || logger.getEffectiveLevel() == Level.toLevel(logLevels[cnt])) {
%>
[<%=logLevels[cnt].toUpperCase()%>]
<%
} else {
%>
<a href='<%=url%>'>[<%=logLevels[cnt]%>]</a>
<%
}
}
%>
</td>
</tr>
<%
}
%>
</table>
<h2>
Revision: 1.0<br/>
Page Load Time (Millis): <%=(System.currentTimeMillis() - beginPageLoadTime)%>
</h2>
</div>
</body>
</html>
Configure log4j in weblogic server
I have recently configured log4j for our web applications deployed in weblogic 10.3 domain. The steps are given below:
1. Copy log4j-1.2.9.jar & wllog4j.jar under domain_root/lib folder.
2. Create log4j.xml and drop it under domain_root folder. If you have log4j.xml inside the application(EAR/WAR), I would recommend to move outside EAR/WAR as changing severity (log level) would require re-deployment. To avoid this, we can move log4j.xml into domain root folder but again the server needs to be bounced. But there is a fix. Click here for more info.
3. Login to weblogic server console. Go to Servers -> Admin Server-> Logging. Click on advanced mode. Change the logging implementation from JDK to Log4J. Click save.
4. Activate changes. Re-start the admin server.
This should enable log4j and should write logging into log file mentioned in log4j.xml or properties file.
Hang on! There is a catch here. Say now I want to change the log level from DEBUG into WARN or ERROR. How do i do? We go to log4j.xml and change the level. Now how does this change take into effect? It needs bouncing of the server. That part i didn't like it. But guess what I have a solution for this. Please click here for changing the log levels on the fly at run time. Log4jAdmin.jsp will do the trick.
Some of our readers asked for example of log4j.xml. If you google it you will get plenty of them, still I am honoring your requests. Here you go, folks:
log4j.xml:
<?xml version="1.0" encoding="UTF-8" ?><!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration>
<appender name="CONSOLE" class="org.apache.log4j.ConsoleAppender">
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern"
value="%d [%t] %-5p %c - %m%n"/>
</layout>
</appender>
<appender name="FILE" class="org.apache.log4j.RollingFileAppender">
<param name="File" value="/log/myApp.log"/>
<param name="Append" value="true"/>
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d{ISO8601} %t %-5p %c{2} - %m%n"/>
</layout>
</appender>
<logger name="org.apache">
<level value="WARN"/>
</logger>
<logger name="org.springframework">
<level value="WARN"/>
</logger>
<root>
<level value="DEBUG"/>
<appender-ref ref="FILE"/>
<!-- <appender-ref ref="CONSOLE"/> -->
</root>
</log4j:configuration>
I have disabled log4j to write into weblogic console by commenting out. If you want to enable it just uncomment it and bounce the server, you are done!
1. Copy log4j-1.2.9.jar & wllog4j.jar under domain_root/lib folder.
2. Create log4j.xml and drop it under domain_root folder. If you have log4j.xml inside the application(EAR/WAR), I would recommend to move outside EAR/WAR as changing severity (log level) would require re-deployment. To avoid this, we can move log4j.xml into domain root folder but again the server needs to be bounced. But there is a fix. Click here for more info.
3. Login to weblogic server console. Go to Servers -> Admin Server-> Logging. Click on advanced mode. Change the logging implementation from JDK to Log4J. Click save.
4. Activate changes. Re-start the admin server.
This should enable log4j and should write logging into log file mentioned in log4j.xml or properties file.
Hang on! There is a catch here. Say now I want to change the log level from DEBUG into WARN or ERROR. How do i do? We go to log4j.xml and change the level. Now how does this change take into effect? It needs bouncing of the server. That part i didn't like it. But guess what I have a solution for this. Please click here for changing the log levels on the fly at run time. Log4jAdmin.jsp will do the trick.
Some of our readers asked for example of log4j.xml. If you google it you will get plenty of them, still I am honoring your requests. Here you go, folks:
log4j.xml:
<?xml version="1.0" encoding="UTF-8" ?><!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration>
<appender name="CONSOLE" class="org.apache.log4j.ConsoleAppender">
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern"
value="%d [%t] %-5p %c - %m%n"/>
</layout>
</appender>
<appender name="FILE" class="org.apache.log4j.RollingFileAppender">
<param name="File" value="/log/myApp.log"/>
<param name="Append" value="true"/>
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d{ISO8601} %t %-5p %c{2} - %m%n"/>
</layout>
</appender>
<logger name="org.apache">
<level value="WARN"/>
</logger>
<logger name="org.springframework">
<level value="WARN"/>
</logger>
<root>
<level value="DEBUG"/>
<appender-ref ref="FILE"/>
<!-- <appender-ref ref="CONSOLE"/> -->
</root>
</log4j:configuration>
I have disabled log4j to write into weblogic console by commenting out. If you want to enable it just uncomment it and bounce the server, you are done!
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