Adam Rauch created IO-811: ----------------------------- Summary: Files.walk() direct and indirect callers fail to close the returned Stream<Path> Key: IO-811 URL: https://issues.apache.org/jira/browse/IO-811 Project: Commons IO Issue Type: Bug Components: Utilities Affects Versions: 2.13.0 Environment: Windows 11, Eclipse Adoptium OpenJDK 17.0.8.1+1 Reporter: Adam Rauch
JDK method Files.walk() clearly documents that the returned Stream<Path> must be closed: "This method must be used within a try-with-resources statement or similar control structure to ensure that the stream's open directories are closed promptly after the stream's operations have completed." However, the Commons IO methods that consume these streams fail to close them. And the methods that pass on these streams fail to document that closing them is required. Problematic methods that I see: * PathUtils.walk() lacks a documentation warning * FilesUncheck.walk() both variants lack a documentation warning * FileUtils.streamFiles() lacks a documentation warning * FileUtils.listFiles() consumes a Files.walk() stream without closing it * FileUtils.iterateFiles() claims to close the stream if the iterator is consumed, however, in my test of consuming an iterator returned from this method, a breakpoint set on FileTreeWalker.close() is never hit Failing to close these streams can result in file handle leaks and other problems, hence the importance of documenting and heading this requirement from the JDK method. -- This message was sent by Atlassian Jira (v8.20.10#820010)