Simon Wai created LOG4J2-885:
--------------------------------
Summary: Can't load custom appender from applet/JNLP
Key: LOG4J2-885
URL: https://issues.apache.org/jira/browse/LOG4J2-885
Project: Log4j 2
Issue Type: Bug
Components: Appenders, Configurators, Plugins
Affects Versions: 2.0.2
Environment: Applet
Reporter: Simon Wai
I have a JNLP-launched applet using log4j2. Built-in appenders such as
RollingFileAppender work as expected, but it is unable to load a custom
appender.
Log4j2 with the custom appender works fine when the applet is launched from
Eclipse (Run Configuration = Java Applet), but gives a CLASS_NOT_FOUND error
when launched from a JNLP file on the web server.
Logs when launched from web as a JNLP-based applet (non-working):
{noformat}
2014-10-23 19:39:40,778 DEBUG Generated plugins in 0.005919 seconds, packages:
[com.mycompany.myproduct.common.log4jext, org.apache.logging.log4j.core],
preload: true.
basic: JNLP2ClassLoader.findClass:
org.apache.logging.log4j.core.config.xml.XmlConfiguration$Status: try again ..
basic: JNLP2ClassLoader.findClass:
org.apache.logging.log4j.core.config.xml.XmlConfiguration$ErrorType: try again
..
2014-10-23 19:39:40,781 ERROR Error processing element SwHttp: CLASS_NOT_FOUND
2014-10-23 19:39:40,782 INFO Scanning for classes in
[http://neptune.domain.mycompany.com:9249/app/applets/log4j-core-2.0.2-signed.jar]
matching criteria: annotated with @Plugin
2014-10-23 19:39:40,782 ERROR Could not search jar file
'http:\neptune.domain.mycompany.com:9249\app\applets\log4j-core-2.0.2-signed.jar'
for classes matching criteria: annotated with @Plugin file not found
java.io.FileNotFoundException:
http:\neptune.domain.mycompany.com:9249\app\applets\log4j-core-2.0.2-signed.jar
(The filename, directory name, or volume label syntax is incorrect)
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.<init>(Unknown Source)
at
org.apache.logging.log4j.core.config.plugins.util.ResolverUtil.loadImplementationsInJar(ResolverUtil.java:300)
at
org.apache.logging.log4j.core.config.plugins.util.ResolverUtil.findInPackage(ResolverUtil.java:196)
at
org.apache.logging.log4j.core.config.plugins.util.PluginManager.loadFromPackages(PluginManager.java:177)
at
org.apache.logging.log4j.core.config.plugins.util.PluginManager.collectPlugins(PluginManager.java:156)
at
org.apache.logging.log4j.core.config.plugins.util.PluginManager.collectPlugins(PluginManager.java:136)
at
org.apache.logging.log4j.core.lookup.Interpolator.<init>(Interpolator.java:46)
at
org.apache.logging.log4j.core.config.AbstractConfiguration.doConfigure(AbstractConfiguration.java:337)
at
org.apache.logging.log4j.core.config.AbstractConfiguration.start(AbstractConfiguration.java:150)
at
org.apache.logging.log4j.core.LoggerContext.setConfiguration(LoggerContext.java:364)
at
org.apache.logging.log4j.core.LoggerContext.reconfigure(LoggerContext.java:422)
at
org.apache.logging.log4j.core.LoggerContext.start(LoggerContext.java:146)
at
org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:85)
at
org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:37)
at org.apache.logging.log4j.LogManager.getLogger(LogManager.java:474)
at
com.mycompany.myproduct.applet.myproductApplet.<clinit>(myproductApplet.java:125)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown
Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at java.lang.Class.newInstance(Unknown Source)
at com.sun.deploy.uitoolkit.impl.awt.AWTAppletAdapter$1.run(Unknown
Source)
at java.awt.event.InvocationEvent.dispatch(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$200(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown
Source)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown
Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown
Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)
{noformat}
Logs when launched from Eclipse (working):
{noformat}
2014-10-23 19:37:32,424 DEBUG Starting configuration
XmlConfiguration[location=C:\Users\myuser\Documents\_mycompany\Dev\myproject\trunk\java\com.mycompany.myproduct.staticresources\bin\com\mycompany\myproduct\staticresources\applet\log4j2.xml]
2014-10-23 19:37:32,429 INFO Scanning for classes in
[/C:/Users/myuser/Documents/_mycompany/Dev/myproject/trunk/java/com.mycompany.myproduct.common/bin/com/mycompany/myproduct/common/log4jext]
matching criteria: annotated with @Plugin
2014-10-23 19:37:32,429 DEBUG Checking to see if class
com.mycompany.myproduct.common.log4jext.LogQueue matches criteria [annotated
with @Plugin]
2014-10-23 19:37:32,429 DEBUG Checking to see if class
com.mycompany.myproduct.common.log4jext.SwHttpAppender matches criteria
[annotated with @Plugin]
2014-10-23 19:37:32,430 DEBUG Checking to see if class
com.mycompany.myproduct.common.log4jext.SwHttpAppenderRunnable matches criteria
[annotated with @Plugin]
2014-10-23 19:37:32,435 DEBUG Generated plugins in 0.010325 seconds, packages:
[com.mycompany.myproduct.common.log4jext], preload: false.
2014-10-23 19:37:32,437 DEBUG Found Plugin Map at
jar:file:/C:/Users/myuser/Documents/_mycompany/Dev/myproject/trunk/java/com.mycompany.myproduct.common/src/lib/log4j-core-2.0.2.jar!/META-INF/org/apache/logging/log4j/core/config/plugins/Log4j2Plugins.dat
...etc...
{noformat}
I have examined the main applet .jar on the server. The custom appender's
.class file does exist in the proper subfolder in the .jar.
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