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Posted to dev@sling.apache.org by "Karl Pauls (JIRA)" <ji...@apache.org> on 2018/10/10 22:01:00 UTC
[jira] [Updated] (SLING-8006) IndexOutOfBoundsException in
ResourceProviderTracker.setObservationReporterGenerator
[ 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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