Hi, I am application developer team supporting.NET project in Michaels Stores. We have been using log4net.dll version 1.2.10.0 for application logs for our project. The application is implemented in .NET , C# with 3.5 framework.
Recently we have faced System.OutOfMemoryException exception thrown by the application. We have opened case with Microsoft. Microsoft analyzed and said memory consumption is due to FileSystemWatcher objects used by log4net.Config.XmlConfigurator+ConfigureAndWatchHandler which are still alive and pinned objects. >From the memory dump, They found >2000 instances of >log4net.Config.XmlConfigurator+ConfigureAndWatchHandler and the >FileSystemWatcher objects created that contributed this issue. The issue is >happening due to the fragmentation of Gen2 Heap. The reason for the >fragmentation is the pinned System.IO.Overlapped objects used by >FileSystemWatcher objects. To resolve the memory issue, we need to get rid of the fragmentation caused by pinned objects used by FileSystemWatcher objects We have created logger object in singleton class but not sure how multiple objects are being created. When looking at the log4net.dll help from Apache web page, we found the below link for log4net that have bug (LOG4NET-158) in version 1.2.10.0 saying XmlConfigurator.ConfigureAndWatch() leaks resources if called multiple times https://issues.apache.org/jira/browse/LOG4NET-158?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12601148#action_12601148 The issue was fixed in version 1.2.11.0. Please let us know if above memory issue was related to the bug and it has been resolved in the next release. Any help would be greatly appreciated . Best Regards, Yuvraj Work: 972 409 5703 | Support: 972 400 0174 | Cell: 469 438 1396 _____________________________________________________________________________ Scanned by IBM Email Security Management Services powered by MessageLabs. For more information please visit http://www-935.ibm.com/services/us/index.wss/offerfamily/iss/a1026954 _____________________________________________________________________________
