[jira] [Closed] (LOG4J2-2167) Memory leak in Apache Tomcat/8.5.24

["Christian Salway (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/LOG4J2-2167?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Christian Salway closed LOG4J2-2167.
------------------------------------
    Resolution: Invalid

> Memory leak in Apache Tomcat/8.5.24
> -----------------------------------
>
>                 Key: LOG4J2-2167
>                 URL: https://issues.apache.org/jira/browse/LOG4J2-2167
>             Project: Log4j 2
>          Issue Type: Bug
>          Components: Web/Servlet
>    Affects Versions: 2.10.0
>         Environment: OS (on AWS): ubuntu-xenial-16.04-amd64-server-20171121.1 (ami-fcc4db98)
> Server version:        Apache Tomcat/8.5.24
> Server built:          Nov 27 2017 13:05:30 UTC
> Server number:         8.5.24.0
> JVM Version:           1.8.0_151-b12
> JVM Vendor:            Oracle Corporation
>            Reporter: Christian Salway
>
> I'm introducing log4j2 as the logger into my application and when I do that, on a reload, undeploy or stop of the Application, a memory leak is left, which only happens once I introduce the logger into the code.
> {noformat}
> The following web applications were stopped (reloaded, undeployed), but their
> classes from previous runs are still loaded in memory, thus causing a memory
> leak (use a profiler to confirm):
> /myapp
> {noformat}
> My log4j2.xml:
> {code:xml}
> <?xml version="1.0" encoding="UTF-8"?>
> <Configuration status="trace">
>     <Appenders>
>         <Console name="Console">
>             <PatternLayout pattern="%d %p [%c] %m%n" />
>         </Console>
>         <File name="File" bufferedIO="true" fileName="${env:CATALINA_BASE}/logs/app-${date:yyyy-mm-dd}.log">
>             <PatternLayout pattern="%d %p %m%n" />
>         </File>
>     </Appenders>
>     <Loggers>
>         <Root level="all" includeLocation="false">
>             <AppenderRef ref="Console" />
>             <AppenderRef ref="File" />
>         </Root>
>     </Loggers>
> </Configuration>
> {code}
> My dependencies in pom.xml:
> {code:xml}
> <dependency>
>     <groupId>org.apache.logging.log4j</groupId>
>     <artifactId>log4j-api</artifactId>
>     <version>2.10.0</version>
> </dependency>
> <dependency>
>     <groupId>org.apache.logging.log4j</groupId>
>     <artifactId>log4j-core</artifactId>
>     <version>2.10.0</version>
> </dependency>
> {code}
> My WebServlet:
> {code:java}
> import org.apache.logging.log4j.Logger;
> import org.apache.logging.log4j.LogManager;
> import javax.servlet.ServletException;
> import javax.servlet.annotation.WebServlet;
> import javax.servlet.http.HttpServlet;
> import javax.servlet.http.HttpServletRequest;
> import javax.servlet.http.HttpServletResponse;
> import java.io.IOException;
> import java.io.PrintWriter;
> @WebServlet(name = "Servlet", urlPatterns = {"/servlet"}, loadOnStartup = 1)
> public class Servlet extends HttpServlet {
>     private final Logger logger = LogManager.getLogger(Servlet.class);
>     protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
>         logger.info("doGet");
>         PrintWriter out = response.getWriter();
>         out.print("Servlet loaded");
>         out.flush();
>         out.close();
>     }
> }
> {code}



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