Francesca Merighi created LOG4J2-817:
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Summary: Log4j2 in a webapp: MongoCleaner thread creates memory
leaks
Key: LOG4J2-817
URL: https://issues.apache.org/jira/browse/LOG4J2-817
Project: Log4j 2
Issue Type: Bug
Components: Appenders
Affects Versions: 2.0.2
Reporter: Francesca Merighi
I'm using log4j 2 with a MongoDBAppender in a webapp (servlet spec 2.5).
Here the web.xml:
<listener>
<listener-class>org.apache.logging.log4j.web.Log4jServletContextListener</listener-class>
</listener> <filter> <filter-name>log4jServletFilter</filter-name>
<filter-class>org.apache.logging.log4j.web.Log4jServletFilter</filter-class>
</filter> <filter-mapping> <filter-name>log4jServletFilter</filter-name>
<url-pattern>/*</url-pattern> <dispatcher>REQUEST</dispatcher>
<dispatcher>FORWARD</dispatcher> <dispatcher>INCLUDE</dispatcher>
<dispatcher>ERROR</dispatcher> <dispatcher>ASYNC</dispatcher><!-- Servlet 3.0
w/ disabled auto-initialization only; not supported in 2.5 --> </filter-mapping>
Here the log4j2 configuration:
<Configuration status="warn">
<Properties>
<Property
name="MongoDbServer">$${jndi:MongoDB.serverAddress.1.host}:$${jndi:MongoDB.serverAddress.1.port}</Property>
<Property name="MongoDbPassword">$${jndi:MongoDB.password}</Property>
</Properties>
<Appenders>
<NoSql name="databaseAppender">
<MongoDb databaseName="LOGS" collectionName="test"
server="${MongoDbServer}" username="LOGS"
password="${MongoDbPassword}" />
</NoSql>
<Async name="Async">
<AppenderRef ref="databaseAppender" />
</Async>
</Appenders>
<Loggers>
<Root level="info">
<AppenderRef ref="Async" />
</Root>
</Loggers>
When i undeply the webapp, this error log appears:
SEVERE: A web application appears to have started a thread named
[MongoCleaner665622824] but has failed to stop it. This is very likely to
create a memory leak.
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