olamy commented on code in PR #1799:
URL: https://github.com/apache/maven-resolver/pull/1799#discussion_r2826586935
##########
maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultTrackingFileManager.java:
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@@ -161,9 +161,19 @@ private FileLock fileLock(FileChannel channel, boolean
shared) throws IOExceptio
try {
lock = channel.lock(0, Long.MAX_VALUE, shared);
break;
- } catch (OverlappingFileLockException e) {
+ } catch (OverlappingFileLockException | IOException e) {
+ // For Unix process sun.nio.ch.UnixFileDispatcherImpl.lock0()
is a native method that can throw
+ // IOException
+ // with message "Resource deadlock avoided"
+ // the system call level is involving fcntl() or flock()
+ // If the kernel detects that granting the lock would result
in a deadlock
+ // (where two processes are waiting for each other to release
locks which can happen when two processes
+ // are trying to lock the same file),
+ // it returns an EDEADLK error, which Java throws as an
IOException.
Review Comment:
After the wait time, the other process or thread will have released its
lock.
There is similar code in the Android
https://github.com/androidx/androidx/blob/1c55c017b56b3d702e8013a0aa9baee866ea9fb7/datastore/datastore-core/src/androidMain/kotlin/androidx/datastore/core/MultiProcessCoordinator.android.kt#L77
and coursier
https://github.com/coursier/coursier/blob/345d58581abafac56891dcbaef24ec6e79ce0fb5/modules/bootstrap-launcher/src/main/java/coursier/bootstrap/launcher/Download.java#L208
as well as the comment added here.
Maybe we should limit to this `if(e.getMessage().contains("Resource deadlock
avoided"))` though.
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