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Posted to dev@sling.apache.org by "Carsten Ziegeler (JIRA)" <ji...@apache.org> on 2013/07/18 13:06:48 UTC
[jira] [Resolved] (SLING-2975) MapEntry#compareTo method is not
consistent and might throw ISE on Java7
[ https://issues.apache.org/jira/browse/SLING-2975?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Carsten Ziegeler resolved SLING-2975.
-------------------------------------
Resolution: Fixed
Fixed as described above - if the two patterns have the same length, the result of comparing them is returned
> MapEntry#compareTo method is not consistent and might throw ISE on Java7
> ------------------------------------------------------------------------
>
> Key: SLING-2975
> URL: https://issues.apache.org/jira/browse/SLING-2975
> Project: Sling
> Issue Type: Bug
> Components: ResourceResolver
> Affects Versions: Resource Resolver 1.0.6
> Reporter: Carsten Ziegeler
> Assignee: Carsten Ziegeler
> Fix For: Resource Resolver 1.1.0
>
>
> On Java7 sorting the map entries might result in an IllegalStateException:
> java.lang.IllegalArgumentException: Comparison method violates its general
> contract!
> at java.util.ComparableTimSort.mergeLo(ComparableTimSort.java:714)
> at java.util.ComparableTimSort.mergeAt(ComparableTimSort.java:451)
> at java.util.ComparableTimSort.mergeCollapse(ComparableTimSort.java:376)
> at java.util.ComparableTimSort.sort(ComparableTimSort.java:182)
> at java.util.ComparableTimSort.sort(ComparableTimSort.java:146)
> at java.util.Arrays.sort(Arrays.java:472)
> at java.util.Collections.sort(Collections.java:155)
> The behaviour of sorting has changed with Java7 (see http://stackoverflow.com/questions/7849539/comparison-method-violates-its-general-contract-java-7-only) and it now throws such an exception if the compare method is not implemented in an consistent way.
> In our case: if the two strings have the same lengths, always 1 is returned, so compareTo("a", "b") returns 1 while compareTo("b", "a") returns 1 as well
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