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Product Version = NetBeans IDE 7.1.2 (Build 201204101705) Operating System = Windows 7 version 6.1 running on amd64 Java; VM; Vendor = 1.7.0_04 Runtime = Java HotSpot(TM) 64-Bit Server VM 23.0-b21 I have a java project stored at C:\Users\SandroV\Documents\NetBeansProjects\JbNfse, here project A; I have a java library project at C:\Users\SandroV\Documents\NetBeansProjects\libNotaClientBetha, here project B; I have a folder temp into c:\users\username\documents\netbeansprojects. When I open any file from temp folder (maybe on Notepad) and I try to compile the A project then I get a error that can't delete a file from B project . I need to close the file from temp folder to make possible to compile. libNotaClientBetha.init: libNotaClientBetha.deps-clean: Updating property file: C:\Users\SandroV\Documents\NetBeansProjects\JbNfse\build\built-clean.properties Deleting directory C:\Users\SandroV\Documents\NetBeansProjects\libNotaClientBetha\build C:\Users\SandroV\Documents\NetBeansProjects\JbNfse\nbproject\build-impl.xml:1034: The following error occurred while executing this line: C:\Users\SandroV\Documents\NetBeansProjects\JbNfse\nbproject\build-impl.xml:1060: The following error occurred while executing this line: C:\Users\SandroV\Documents\NetBeansProjects\libNotaClientBetha\nbproject\build-impl.xml:1030: Unable to delete file C:\Users\SandroV\Documents\NetBeansProjects\libNotaClientBetha\dist\libNotaClientBetha.jar FALHA NA CONSTRUÇÃO (tempo total: 0 segundos)
I have the same issue with NetBeans IDE 7.2 (Build 201207171143) on Windows XP Whenever i try to clean and build, it will fail 3 different times, with 3 different jar files. at the 4th try works just fine. It's not that bad, but it's getting annoying. Thanks! Sebastian Alcaino this is the line that's failing on the build-impl.xml file <delete dir="${dist.dir}" followsymlinks="false" includeemptydirs="true"/>
Same problem for me with NetBeans IDE 7.2.1 (Build 201210100934). No way to compile applet because the previous version is not deleted. No way to delete myFile.jar in Windows nor DOS neither. DOS diagnostic: This file is being used by another process. Windows diagnostic : This file is open in Java(TM) platform SE library. Please check that Netbeans closes the file after building.
On second analysis, it seams that the process locking the file for deletion is the browser. I am using Chrome, and when I close Chrome totally (not only the tab but the application) then Netbeans builds the jar perfectly.
I have a large set of projects with a custom build script. This error occurs for me all the time due to the IDE itself initiating a "Background Scan" as soon as I start a "Clean and Build". The Background Scan opens JAR files under Windows, then the "Clean" part of the build fails with "Unable to delete file". In my opinion, the background scan should not start until after a build is complete, and if it's currently in progress, it should be paused (with no files open) and restarted after the build is complete. As it currently stands, you can't even pause or stop the "Background Scan" at all.
For me, this happens when I forget to stop the server before a compile/build. In NetBeans, go to the Services tab, right-click your server, and stop it. That might be the process that's holding onto the file/folder that the build process can't delete. Sometimes people used to standalone Eclipse or Websphere IDE's assume the server likewise gets restarted by default in NetBeans -- it doesn't.
According to comment 5 it seems that the handler is held by web server. Reassigning to web server integration.
@Tomas, this bug has nothing to do with web server for me, it is simply that the "Clean and Build" triggers a background scan (of every project) as soon as some files in one project are deleted. If I do a separate "Clean" first, then a "Build" the clean manages to finish before the background scan locks the files.
Clean on Web/EE Projects undeploys app from the server first so it should not be a server issue. Most of the comments do not refer to Web app nor server either. Sorry I'm passing back.
When the project depends on the library project the IDE does not use the library jar for resolution (it does not open it), it rather uses caches created for library sources. However the IDE opens the library jar to lookup annotation processors. The IDE overrides the Ant <delete> task to mutually exclude processors lookup and deletion of the jar file. There was one missing place where exclusion was needed which was fixed in dev build Jun 3, 2016 jet-main 2f4bac15b236. So should be fixed now. However we have several similar reports where the jar was opened by some external process not the IDE. Please if the problem happens even with current dev build try to find the process holding the affected jar file using the sysinternals process monitor https://technet.microsoft.com/en-us/sysinternals/processmonitor.aspx. Thanks! Fixed jet-main 2f4bac15b236