Project cannot be built. Possible open file handle -------------------------------------------------- Key: JBIDE-18983 URL: https://issues.jboss.org/browse/JBIDE-18983 Project: Tools (JBoss Tools) Issue Type: Bug Affects Versions: 4.2.1.Final Environment: luna x64 windows 8.1 x64 java 8u25 x64 Reporter: Cody Lerum Frequently when working in a Java EE7 project I will get an error like. "The project was not built due to "Could not delete '/gp-server/target/classes/META-INF`.". Fix the problem, then try refreshing this project and building since it may be inconsistent. I've looked into a process explorer in windows and then this case is happening there is always a javaw.exe process with a file handle to "V:\workspace\gp-server\target\classes\META-INF\persistence.xml It looks like either jboss tools or eclipse is holding on to a file handle for this.