[
https://issues.apache.org/jira/browse/SLING-8006?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Karl Pauls updated SLING-8006:
------------------------------
Description:
When a ResourceProvider goes away while being activated, we remove it from the
list of handlers for a given path. However, we don't remove the empty list of
handlers in the case where it was the only available handler for a given path.
That can lead to a problem later on where we assume that if we have a list of
handlers for a path it will at least contain one handler (and just use
.get(0)). This happens in the
ResourceProviderTracker.setObservationReporterGenerator method and will cause
IOOB Exceptions from that point onwards.
Looks like this:
{noformat}
java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
at java.util.ArrayList.rangeCheck(ArrayList.java:657)
at java.util.ArrayList.get(ArrayList.java:433)
at
org.apache.sling.resourceresolver.impl.providers.ResourceProviderTracker.setObservationReporterGenerator(ResourceProviderTracker.java:155)
at
org.apache.sling.resourceresolver.impl.observation.ResourceChangeListenerWhiteboard.updateProviderTracker(ResourceChangeListenerWhiteboard.java:109)
at
org.apache.sling.resourceresolver.impl.observation.ResourceChangeListenerWhiteboard.access$100(ResourceChangeListenerWhiteboard.java:44)
at
org.apache.sling.resourceresolver.impl.observation.ResourceChangeListenerWhiteboard$1.addingService(ResourceChangeListenerWhiteboard.java:88)
at
org.apache.sling.resourceresolver.impl.observation.ResourceChangeListenerWhiteboard$1.addingService(ResourceChangeListenerWhiteboard.java:64)
{noformat}
was:
When a ResourceProvider goes away while being activated, we remove it from the
list of handlers for a given path. However, we don't remove the empty list of
handlers in the case where it was the only available handler for a given path.
That can lead to a problem later on where we assume that if we have a list of
handlers for a path it will at least contain one handler (and just use
.get(0)). This happens in the
ResourceProviderTracker.setObservationReporterGenerator method and will cause
IOOB Exceptions from that point onwards.
> IndexOutOfBoundsException in
> ResourceProviderTracker.setObservationReporterGenerator
> ------------------------------------------------------------------------------------
>
> Key: SLING-8006
> URL: https://issues.apache.org/jira/browse/SLING-8006
> Project: Sling
> Issue Type: Bug
> Components: ResourceResolver
> Affects Versions: Resource Resolver 1.6.6
> Reporter: Karl Pauls
> Assignee: Karl Pauls
> Priority: Major
> Fix For: Resource Resolver 1.6.8
>
>
> When a ResourceProvider goes away while being activated, we remove it from
> the list of handlers for a given path. However, we don't remove the empty
> list of handlers in the case where it was the only available handler for a
> given path.
> That can lead to a problem later on where we assume that if we have a list of
> handlers for a path it will at least contain one handler (and just use
> .get(0)). This happens in the
> ResourceProviderTracker.setObservationReporterGenerator method and will cause
> IOOB Exceptions from that point onwards.
> Looks like this:
> {noformat}
> java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
> at java.util.ArrayList.rangeCheck(ArrayList.java:657)
> at java.util.ArrayList.get(ArrayList.java:433)
> at
> org.apache.sling.resourceresolver.impl.providers.ResourceProviderTracker.setObservationReporterGenerator(ResourceProviderTracker.java:155)
>
> at
> org.apache.sling.resourceresolver.impl.observation.ResourceChangeListenerWhiteboard.updateProviderTracker(ResourceChangeListenerWhiteboard.java:109)
>
> at
> org.apache.sling.resourceresolver.impl.observation.ResourceChangeListenerWhiteboard.access$100(ResourceChangeListenerWhiteboard.java:44)
>
> at
> org.apache.sling.resourceresolver.impl.observation.ResourceChangeListenerWhiteboard$1.addingService(ResourceChangeListenerWhiteboard.java:88)
>
> at
> org.apache.sling.resourceresolver.impl.observation.ResourceChangeListenerWhiteboard$1.addingService(ResourceChangeListenerWhiteboard.java:64)
>
> {noformat}
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