Hi,

>org.apache.commons.collections4.map.LinkedMap.writeObject

Wicket does not use commons-collections, so please check where this instance is coming from.

It seems another thread is working on the map while Wicket tries to serialize the page.

Hope this helps
Sven


On 16.05.2016 14:21, Francesco Chicchiriccò wrote:
Hi all,
I am sometimes seeing exceptions like [1] in Syncope console logs, since upgrade to Wicket 7.3.0 - I am sure enough that this was not happening with Wicket 7.2.0.

Any hint?
TIA

Regards.

[1] https://paste.apache.org/Q7Jy



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