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https://issues.apache.org/jira/browse/MRESOLVER-370?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17731932#comment-17731932
]
ASF GitHub Bot commented on MRESOLVER-370:
------------------------------------------
gnodet commented on code in PR #299:
URL: https://github.com/apache/maven-resolver/pull/299#discussion_r1227686061
##########
maven-resolver-named-locks/src/main/java/org/eclipse/aether/named/support/NamedLockSupport.java:
##########
@@ -32,18 +39,74 @@ public abstract class NamedLockSupport implements NamedLock
{
private final NamedLockFactorySupport factory;
+ private final ConcurrentHashMap<Thread, Deque<String>> diagnosticState; //
non-null only if diag enabled
Review Comment:
Should we use a `ThreadLocal<Deque>` ?
That would simplify the code a bit imho (untested):
```
private final ThreadLocal<Deque> diagnosticState =
factory.isDiagnosticEnabled() ? ThreadLocal.withInitial(ArrayDeque::new) : null;
```
and then
```
if (diagnosticState != null) {
diagnosticState.get().push("shared");
}
```
> Lock factory should dump lock states on failure
> -----------------------------------------------
>
> Key: MRESOLVER-370
> URL: https://issues.apache.org/jira/browse/MRESOLVER-370
> Project: Maven Resolver
> Issue Type: New Feature
> Components: Resolver
> Reporter: Tamas Cservenak
> Assignee: Tamas Cservenak
> Priority: Major
> Fix For: 1.9.11
>
>
> When adapter "gives up" (as it could not acquire required lock), the error
> currently states "how many retries were against which lock". This gives
> information only about failed lock, but lacks the "whole picture".
> Proposed change: in case of lock failure, factory should dump out all lock
> states (may be huge on big builds), as that would allow simpler
> identification of possible problems. All this could be sorted out at "high
> level" (so no need to fiddle with file locks, hazelcast or redisson), but for
> memory constraints it should NOT be enabled by default, this "diagnostic"
> should be turned off by default, but possible by users to turn on if needed.
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