elharo opened a new issue, #1070:
URL: https://github.com/apache/maven-compiler-plugin/issues/1070
## Bug Description
`CompilerMojo.getOutputDirectoryPerVersion()` at
`src/main/java/org/apache/maven/plugin/compiler/CompilerMojo.java` line 350
calls `Files.walk(root, 1)` without wrapping the result in a try-with-resources
block. The returned `Stream<Path>` encapsulates a `DirectoryStream` handle that
is not released until garbage collection.
## Impact
On large multi-release projects with many versioned source directories, this
can cause "Too many open files" errors because the directory streams are not
promptly closed.
## Code
```java
Files.walk(root, 1).forEach((path) -> {
// ...
});
```
## Fix
Wrap in try-with-resources:
```java
try (Stream<Path> stream = Files.walk(root, 1)) {
stream.forEach((path) -> {
// ...
});
}
```
This ensures the stream (and its underlying directory handle) is closed
immediately after processing.
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