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https://issues.apache.org/jira/browse/SLING-11317?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17536005#comment-17536005
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Konrad Windszus commented on SLING-11317:
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[~schulm] Thanks for the report. Can you come up with a PR containing the fix
and in the best case a test case for that behaviour?
> 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
>
> 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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