[
https://issues.apache.org/jira/browse/LOG4J2-3231?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17459623#comment-17459623
]
Phong X. Nguyen commented on LOG4J2-3231:
-----------------------------------------
Sure. Stack trace below:
(After looking more carefully, it looks like someone's unit test stubs out
{{InetAddress}, which is probably triggering the problem. Still, should this be
fixed?)
{code:java}
java.lang.ExceptionInInitializerError
at java.net.NetworkInterface.<clinit>(NetworkInterface.java:65)
at
org.apache.logging.log4j.core.util.NetUtils.getLocalIps(NetUtils.java:102)
at
org.apache.logging.log4j.core.net.JndiManager.<clinit>(JndiManager.java:61)
at
org.apache.logging.log4j.core.lookup.Interpolator.<init>(Interpolator.java:112)
at
org.apache.logging.log4j.core.config.AbstractConfiguration.<init>(AbstractConfiguration.java:131)
at
org.apache.logging.log4j.core.config.NullConfiguration.<init>(NullConfiguration.java:32)
at
org.apache.logging.log4j.core.LoggerContext.<clinit>(LoggerContext.java:85)
at
org.apache.logging.log4j.core.selector.ClassLoaderContextSelector.createContext(ClassLoaderContextSelector.java:254)
at
org.apache.logging.log4j.core.selector.ClassLoaderContextSelector.locateContext(ClassLoaderContextSelector.java:218)
at
org.apache.logging.log4j.core.selector.ClassLoaderContextSelector.getContext(ClassLoaderContextSelector.java:136)
at
org.apache.logging.log4j.core.selector.ClassLoaderContextSelector.getContext(ClassLoaderContextSelector.java:123)
at
org.apache.logging.log4j.core.selector.ClassLoaderContextSelector.getContext(ClassLoaderContextSelector.java:117)
at
org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:150)
at
org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:47)
at org.apache.logging.log4j.LogManager.getContext(LogManager.java:196)
at
org.apache.logging.log4j.spi.AbstractLoggerAdapter.getContext(AbstractLoggerAdapter.java:137)
at
org.apache.logging.slf4j.Log4jLoggerFactory.getContext(Log4jLoggerFactory.java:55)
at
org.apache.logging.log4j.spi.AbstractLoggerAdapter.getLogger(AbstractLoggerAdapter.java:47)
at
org.apache.logging.slf4j.Log4jLoggerFactory.getLogger(Log4jLoggerFactory.java:33)
at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:363)
at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:388)
at org.example.App.<clinit>(App.java:12)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at
org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:365)
at
org.apache.maven.surefire.junit4.JUnit4Provider.executeWithRerun(JUnit4Provider.java:273)
at
org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:238)
at
org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:159)
at
org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:384)
at
org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:345)
at
org.apache.maven.surefire.booter.ForkedBooter.execute(ForkedBooter.java:126)
at
org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:418)
Caused by: java.lang.NullPointerException
at java.net.Inet6Address.<init>(Inet6Address.java:377)
at java.net.NetworkInterface.getAll(Native Method)
at
java.net.NetworkInterface.getNetworkInterfaces(NetworkInterface.java:355)
at
java.net.DefaultInterface.chooseDefaultInterface(DefaultInterface.java:67)
at java.net.DefaultInterface.<clinit>(DefaultInterface.java:46)
... 32 more
{code}
{code:java}
package org.example;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Hello world!
*
*/
public class App
{
private static final Logger logger = LoggerFactory.getLogger(App.class);
public int foo() {
logger.info("Test Foo!");
return 10;
}
public int bar() {
logger.info("Test Bar!");
return foo();
}
public static void main( String[] args )
{
System.out.println( "Hello World!" );
}
}
{code}
{code:java}
package org.example;
import static org.junit.Assert.assertEquals;
import mockit.Expectations;
import mockit.Mocked;
import mockit.Tested;
import mockit.integration.junit4.JMockit;
import org.junit.Test;
import org.junit.runner.RunWith;
import java.net.InetAddress;
/**
* Unit test for simple App.
*/
@RunWith(JMockit.class)
public class AppTest
{
@Tested
App app;
@Mocked(stubOutClassInitialization = true)
InetAddress inetAddress;
@Test
public void testFoo()
{
new Expectations(app) {{
app.foo();
result = 15;
}};
assertEquals(15, app.bar());
}
}
{code}
{code:xml}
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0";
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
http://maven.apache.org/xsd/maven-4.0.0.xsd";>
<modelVersion>4.0.0</modelVersion>
<groupId>org.example</groupId>
<artifactId>log4j2-issue</artifactId>
<version>1.0-SNAPSHOT</version>
<name>log4j2-issue</name>
<!-- FIXME change it to the project's website -->
<url>http://www.example.com</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.13.2</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.32</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-slf4j-impl</artifactId>
<version>2.16.0</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-api</artifactId>
<version>2.16.0</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
<version>2.16.0</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-1.2-api</artifactId>
<version>2.16.0</version>
</dependency>
<dependency>
<groupId>org.jmockit</groupId>
<artifactId>jmockit</artifactId>
<version>1.24</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<pluginManagement><!-- lock down plugins versions to avoid using Maven
defaults (may be moved to parent pom) -->
<plugins>
<!-- clean lifecycle, see
https://maven.apache.org/ref/current/maven-core/lifecycles.html#clean_Lifecycle
-->
<plugin>
<artifactId>maven-clean-plugin</artifactId>
<version>3.1.0</version>
</plugin>
<!-- default lifecycle, jar packaging: see
https://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_jar_packaging
-->
<plugin>
<artifactId>maven-resources-plugin</artifactId>
<version>3.0.2</version>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.0</version>
</plugin>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.22.1</version>
</plugin>
<plugin>
<artifactId>maven-jar-plugin</artifactId>
<version>3.0.2</version>
</plugin>
<plugin>
<artifactId>maven-install-plugin</artifactId>
<version>2.5.2</version>
</plugin>
<plugin>
<artifactId>maven-deploy-plugin</artifactId>
<version>2.8.2</version>
</plugin>
<!-- site lifecycle, see
https://maven.apache.org/ref/current/maven-core/lifecycles.html#site_Lifecycle
-->
<plugin>
<artifactId>maven-site-plugin</artifactId>
<version>3.7.1</version>
</plugin>
<plugin>
<artifactId>maven-project-info-reports-plugin</artifactId>
<version>3.0.0</version>
</plugin>
</plugins>
</pluginManagement>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<configuration>
<trimStackTrace>false</trimStackTrace>
</configuration>
</plugin>
</plugins>
</build>
</project>
{code}
> JndiManager.isJndiEnabled generates a call to NetUtils.getLocalIps
> ------------------------------------------------------------------
>
> Key: LOG4J2-3231
> URL: https://issues.apache.org/jira/browse/LOG4J2-3231
> Project: Log4j 2
> Issue Type: Bug
> Components: Core
> Affects Versions: 2.16.0
> Reporter: Phong X. Nguyen
> Priority: Major
>
> While trying to upgrade from 2.15.0 to 2.16.0, we discovered some of our unit
> tests were failing. On further investigation, we realized that the new
> {{JndiManager.isJndiEnabled()}} method, on first call, causes initialization
> of all static members of {{{}JndiManager{}}}, including a call to
> {{{}NetUtils.getLocalIps{}}}. In at least one of our unit test frameworks,
> this generates a NullPointerException.
> Could some of the {{permanentAllowed}} lists initialization be deferred to
> avoid this issue?
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