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https://issues.apache.org/jira/browse/SLING-7544?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16407942#comment-16407942
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ASF GitHub Bot commented on SLING-7544:
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rombert commented on a change in pull request #5: SLING-7544 - improving
optimized alias lookup to not block during int…
URL:
https://github.com/apache/sling-org-apache-sling-resourceresolver/pull/5#discussion_r176084452
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File path:
src/main/java/org/apache/sling/resourceresolver/impl/mapping/MapEntries.java
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@@ -127,7 +128,9 @@
private Map <String,List <String>> vanityTargets;
- private Map<String, Map<String, String>> aliasMap;
+ private volatile Map<String, Map<String, String>> aliasMap;
Review comment:
Two volatile flags don't ensure consistency. Either use a synchronized block
and non-volatile fileds or ensure thread safety in some other manner.
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> Make optimized alias lookup non-blocking
> ----------------------------------------
>
> Key: SLING-7544
> URL: https://issues.apache.org/jira/browse/SLING-7544
> Project: Sling
> Issue Type: Improvement
> Components: ResourceResolver
> Affects Versions: Resource Resolver 1.5.36
> Reporter: Dominik Süß
> Priority: Major
>
> The implementation of optimized alias lookup as introduced with SLING-2521
> blocks CommonResourceResolver activation while loading aliases to fillup the
> aliasmap. In case a corresponding index is not present yet this can lead to
> full tree traversal while indexing is doing the same in the background.
> The proposed improvements are:
> * making loading of the aliasmap happen asynchronously
> * only use optimized handling as soon as aliasmap is built
> * wait for non traversal index (optional - forced by default, can be turned
> off for small datasets)
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