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Sean Poulter commented on IO-544: --------------------------------- Well, your hunch was right Bernd and I'm confused. Instead of a 0 length file, Files.copy is reporting that the destination file is in use: {{java.nio.file.FileSystemException: C:\...\file -> \\Machine2\...\file: The process cannot access the file because it is being used by another process.}} > Should FileUtils.copyFile be flushed and synced before comparing file sizes? > ---------------------------------------------------------------------------- > > Key: IO-544 > URL: https://issues.apache.org/jira/browse/IO-544 > Project: Commons IO > Issue Type: Bug > Components: Utilities > Affects Versions: 2.5 > Environment: Win Server 2008, x86 > Reporter: Sean Poulter > > I've been struggling to troubleshoot intermittent {{IOExceptions}} thrown > from {{FileUtils.doCopyFile}} when copying 2-4KB files from a local temporary > file to a network drive. Despite the error, the file appears on the network > drive when I check. Should the output channel/buffer be forced/flushed before > closing, and synchronized before comparing the file lengths? It's a rather > intermittent issue on a relatively high throughput PC so I'd expect there to > be more IO latency than normal. > I found myself referencing: > * [The source code for FileUtils > v2.5|https://commons.apache.org/proper/commons-io/javadocs/api-2.5/src-html/org/apache/commons/io/FileUtils.html] > * > [FileChannel#force(boolean)|https://docs.oracle.com/javase/8/docs/api/java/nio/channels/FileChannel.html#force-boolean-] > * [IO-443 - FileUtils.copyFile methods throw an unnecessary "Failed to copy > full contents from" exception|https://issues.apache.org/jira/browse/IO-443] > Thanks, > Sean -- This message was sent by Atlassian JIRA (v6.4.14#64029)