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From "Claus Ibsen (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (CAMEL-10562) UnsupportedOperationException in DefaultCamelContext#safelyStartRouteServices
Date Thu, 08 Dec 2016 08:43:58 GMT

     [ https://issues.apache.org/jira/browse/CAMEL-10562?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Claus Ibsen resolved CAMEL-10562.
---------------------------------
    Resolution: Fixed
      Assignee: Claus Ibsen

Thanks for reporting and the PR

> UnsupportedOperationException in DefaultCamelContext#safelyStartRouteServices
> -----------------------------------------------------------------------------
>
>                 Key: CAMEL-10562
>                 URL: https://issues.apache.org/jira/browse/CAMEL-10562
>             Project: Camel
>          Issue Type: Bug
>          Components: camel-core
>    Affects Versions: 2.18.0, 2.18.1
>         Environment: Oracle JDK 1.8.0_(<20)
>            Reporter: Stefan
>            Assignee: Claus Ibsen
>            Priority: Critical
>             Fix For: 2.18.2, 2.19.0
>
>
> DefaultCamelContext#safelyStartRouteServices the following code is called:
> {code}
> Collections.sort(startupListeners, new OrderedComparator());
> {code}
> {{startupListeners}} is a {{CopyOnWriteArrayList}}.
> In the specification of Collections.sort it is stated, that an UnsupportedOperationException
is thrown if the collections listiterator doesn't support the set-operation.
> Sadly, the documentation of CopyOnWriteArrayList#listIterator states, that the listiterator
doesn't support this operation.
> As expected in this szenario, the UnsupportedOperationException is thrown during startup
of the camel context if an Oracle JDK 1.8.0 with patchlevel lower than 20 is used.
> In 1.8.0_20 the operation Collections#sort(List,Comparator) is rewritten to delegate
to List#sort(Comparator) so it doesn't matter anymore if the lists listIterator supports the
set-operation.
> The issue can trivially been fixed by replacing the line by
> {code}
> startupListeners.sort(new OrderedComparator());
> {code}



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