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https://issues.apache.org/jira/browse/WICKET-6167?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15294971#comment-15294971
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Martin Grigorov commented on WICKET-6167:
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This ticket is related to WICKET-6107.
But all it does is to broadcast a Wicket event whenever a WebSocket connection
is closed.
After the broadcast Wicket detaches the request cycle and here it seems you
have a component with custom Java serialization (custom writeObject()?!) that
modifies it children during the serialization.
> Random ConcurrentModificationException since upgrade to 7.3.0
> -------------------------------------------------------------
>
> Key: WICKET-6167
> URL: https://issues.apache.org/jira/browse/WICKET-6167
> Project: Wicket
> Issue Type: Bug
> Components: wicket-native-websocket
> Affects Versions: 7.3.0
> Environment: Apache Syncope 2.0.0-SNAPSHOT
> Reporter: Francesco Chicchiriccò
> Assignee: Martin Grigorov
>
> As [reported in mailing
> list|https://lists.apache.org/thread.html/Zqmev2wqdxnjxya] we randomly see
> exceptions (see [an example|https://paste.apache.org/Q7Jy]) in Apache Syncope
> admin console logs after upgrading from Wicket 7.2.0.
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