elharo opened a new issue, #12606:
URL: https://github.com/apache/maven/issues/12606
# DefaultDependencyResolver: Unbounded per-instance module caches
**Found in:** maven-4.0.x branch
**File:**
`impl/maven-impl/src/main/java/org/apache/maven/impl/resolver/DefaultDependencyResolver.java`
(lines 81, 86-89, 97-98)
**Severity:** Medium
## Description
The class is `@Singleton` but the `moduleCaches` map holds
`PathModularizationCache` instances that are never cleaned up:
```java
private final Map<Runtime.Version, PathModularizationCache> moduleCaches;
public DefaultDependencyResolver() {
moduleCaches = new ConcurrentHashMap<>();
}
```
Each unique `Runtime.Version` creates a new cache entry that stays in memory
for the lifetime of the JVM. The TODOs on lines 78 and 87 acknowledge this
should be session-wide. This is a memory leak in long-running build
environments (e.g., Maven in server mode, IDE integration).
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