Concurrency bug in tools.deps use of Aether/Maven libs?

Question

Occasionally, I've been seeing this error:

[org.eclipse.aether.internal.impl.DefaultTrackingFileManager] [] {} Failed to read tracking file '/home/sean/.m2/repository/org/apache/maven/maven/3.8.8/_remote.repositories' java.nio.channels.ClosedChannelException

which leads to

Expected HashMap$TreeNode, but was given HashMap$Node, at java.util.HashMap$TreeNode/moveRootToFront (HashMap.java:2020) - runtime error (unexpected type).

And the only solution seems to be to blow away part of the ~/.m2/repository and use -Sforce to recompute/redownload.

Any idea what might cause this sort of error? (Windows/WSL2, Ubuntu 20.04, all the very latest CLI/Clojure etc). See Slack thread for more discussion: https://clojurians.slack.com/archives/C6QH853H8/p1784653752175769

More of the stacktrace:
`
at java.base/sun.nio.ch.FileChannelImpl.ensureOpen(FileChannelImpl.java:169)

    at java.base/sun.nio.ch.FileChannelImpl.lock(FileChannelImpl.java:1676)
    at org.eclipse.aether.internal.impl.DefaultTrackingFileManager.fileLock(DefaultTrackingFileManager.java:171)
    at org.eclipse.aether.internal.impl.DefaultTrackingFileManager.read(DefaultTrackingFileManager.java:65)
    at org.eclipse.aether.internal.impl.EnhancedLocalRepositoryManager.readRepos(EnhancedLocalRepositoryManager.java:220)
    at org.eclipse.aether.internal.impl.EnhancedLocalRepositoryManager.checkFind(EnhancedLocalRepositoryManager.java:151)
    at org.eclipse.aether.internal.impl.EnhancedLocalRepositoryManager.find(EnhancedLocalRepositoryManager.java:128)
    at org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolve(DefaultArtifactResolver.java:360)
    at org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolveArtifacts(DefaultArtifactResolver.java:261)
    at org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolveArtifact(DefaultArtifactResolver.java:243)
    at org.apache.maven.repository.internal.DefaultModelResolver.resolveModel(DefaultModelResolver.java:158)
    at org.apache.maven.repository.internal.DefaultModelResolver.resolveModel(DefaultModelResolver.java:204)
    at org.apache.maven.model.building.DefaultModelBuilder.readParentExternally(DefaultModelBuilder.java:1035)
    at org.apache.maven.model.building.DefaultModelBuilder.readParent(DefaultModelBuilder.java:827)
    at org.apache.maven.model.building.DefaultModelBuilder.build(DefaultModelBuilder.java:336)
    at org.apache.maven.model.building.DefaultModelBuilder.build(DefaultModelBuilder.java:248)
    at org.apache.maven.repository.internal.DefaultArtifactDescriptorReader.loadPom(DefaultArtifactDescriptorReader.java:293)
    at org.apache.maven.repository.internal.DefaultArtifactDescriptorReader.readArtifactDescriptor(DefaultArtifactDescriptorReader.java:183)
    at org.eclipse.aether.internal.impl.DefaultRepositorySystem.readArtifactDescriptor(DefaultRepositorySystem.java:269)
    at clojure.tools.deps.extensions.maven$read_descriptor.invokeStatic(maven.clj:117)
    at clojure.tools.deps.extensions.maven$read_descriptor.invoke(maven.clj:108)
    at clojure.tools.deps.extensions.maven$eval61086$fn__61087.invoke(maven.clj:148)

`

Comments

which file system is hosting the local maven repo?

is there any chance another tool is simultaneously updating these files outside the CLI? (such as your IDE or an AI tool)

---

Everything is on WSL2 (Ubuntu 20.04). No, nothing is updating these files outside of the CLI.