Jed Wesley-Smith created LOG4J2-169:
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Summary: ConfigurationFactory is not thread-safe
Key: LOG4J2-169
URL: https://issues.apache.org/jira/browse/LOG4J2-169
Project: Log4j 2
Issue Type: Bug
Components: Core
Affects Versions: 2.0-beta4
Reporter: Jed Wesley-Smith
We randomly get the following:
{noformat}
java.util.ConcurrentModificationException
at
org.apache.logging.log4j.core.config.ConfigurationFactory$Factory.getConfiguration(ConfigurationFactory.java:377)
at
org.apache.logging.log4j.core.config.ConfigurationFactory$Factory.getConfiguration(ConfigurationFactory.java:361)
at
org.apache.logging.log4j.core.LoggerContext.reconfigure(LoggerContext.java:266)
at
org.apache.logging.log4j.core.LoggerContext.start(LoggerContext.java:134)
at
org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:75)
at
org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:30)
at org.apache.logging.log4j.LogManager.getLogger(LogManager.java:165)
at org.apache.logging.log4j.LogManager.getLogger(LogManager.java:174)
at …
{noformat}
factories is defined as:
{code}
private static List<ConfigurationFactory> factories = new
ArrayList<ConfigurationFactory>();
{code}
The simple fix is to use a java.util.concurrent.CopyOnWriteArrayList:
{code}
private static final List<ConfigurationFactory> factories = new
CopyOnWriteArrayList<ConfigurationFactory>();
{code}
https://svn.apache.org/repos/asf/logging/log4j/log4j2/trunk/core/src/main/java/org/apache/logging/log4j/core/config/ConfigurationFactory.java
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