SocketAppender is causing a classloader leak -------------------------------------------- Key: LBCORE-205 URL: http://jira.qos.ch/browse/LBCORE-205 Project: logback-core Issue Type: Bug Components: Appender Affects Versions: 0.9.28 Environment: Apache Maven 3.0.3 (r1075438; 2011-02-28 18:31:09+0100) Maven home: /opt/local/share/java/maven3 Java version: 1.6.0_24, vendor: Apple Inc. Java home: /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home Default locale: en_US, platform encoding: MacRoman OS name: "mac os x", version: "10.6.7", arch: "x86_64", family: "mac" Tomcat 7.0.12 Reporter: Joern Huxhorn Assignee: Logback dev list Priority: Critical A classloader leak is caused by SocketAppender which prevents webapps from being properly undeployed and garbage collected. Steps to reproduce: 1.) Download and start Lilith. A server needs to be running and accepting the connection of the SocketAppender. Otherwise the leak will not happen. 2.) Build the webapp at https://github.com/huxi/lilith/tree/master/sandbox/logback-access-sandbox You can toggle the warning by removing or adding the SocketAppender in logback.xml. 3.) Deploy the webapp on Tomcat 7.0.12. 4.) Produce some events by accessing the webapp. 5.) Undeploy the webapp. 6.) Click on "Find leaks". Clicking on "Find leaks" causes the following message to be emitted: 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): /lb-access-sandbox Unfortunately, there is no other information in any log file. The above warning message disappears if the logback-classic SocketAppender is removed from the configuration. I stumbled upon this issue while fixing http://sourceforge.net/apps/trac/lilith/ticket/96 -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://jira.qos.ch/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira