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https://issues.apache.org/jira/browse/SLING-11317?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17540149#comment-17540149
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Martin Schulze commented on SLING-11317:
----------------------------------------
(Draft) PR:
https://github.com/apache/sling-org-apache-sling-rewriter/pull/7/files
> Rewriter configuration gets "lost" in ProcessorManagerImpl when package with
> another configuration gets deployed
> ----------------------------------------------------------------------------------------------------------------
>
> Key: SLING-11317
> URL: https://issues.apache.org/jira/browse/SLING-11317
> Project: Sling
> Issue Type: Bug
> Reporter: Martin Schulze
> Priority: Major
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> On our AEM 6.5 instance (org.apache.sling.rewriter-1.2.2, but nothing major
> happened with this class since this version) we have multiple rewriter
> configurations and sometimes after a deployment of another package with a
> rewriter configuration, a configurations is not triggered anymore and the
> instance has to be restarted to get it working again.
> I've tracked the issue down and found the issue lies in the
> {{ProcessorManagerImpl}} [0]. There are two fields, {{processors}} and
> {{orderedProcessor}}, which are supposed to be mostly (inactive configs are
> not in the {{orderedProcessors}}) "in sync", which is important because later
> on there is an {{updateProcessor}} method [2], where the updated config has
> to be found in the {{processors}} field, but they diverge from the start, in
> the addProcessor [1] method, the added config never reaches the
> {{processors}} field, because the newConfigs local variable never gets added
> to the processors field. This lead to the issue, that in the updateProcessor
> method, which gets triggered through the ResourceChangeListener, a
> configuration gets wrongfully deleted [3].
> [0]
> https://github.com/apache/sling-org-apache-sling-rewriter/blob/master/src/main/java/org/apache/sling/rewriter/impl/ProcessorManagerImpl.java
> [1]
> https://github.com/apache/sling-org-apache-sling-rewriter/blob/master/src/main/java/org/apache/sling/rewriter/impl/ProcessorManagerImpl.java#L240
> [2]
> https://github.com/apache/sling-org-apache-sling-rewriter/blob/master/src/main/java/org/apache/sling/rewriter/impl/ProcessorManagerImpl.java#L299
> [3]
> https://github.com/apache/sling-org-apache-sling-rewriter/blob/master/src/main/java/org/apache/sling/rewriter/impl/ProcessorManagerImpl.java#L378
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