Surveys created in v2.0.2 doesn't work in v. 3.0.2

After upgrade to 3.0.2 surveys section throws exception:

com.thoughtworks.xstream.converters.ConversionException: java.util.Collections-SynchronizedMap : java.util.Collections-SynchronizedMap ---- Debugging information ---- message : java.util.Collections-SynchronizedMap cause-exception : com.thoughtworks.xstream.mapper.CannotResolveClassException cause-message : java.util.Collections-SynchronizedMap class : com.adaptavist.confluence.survey.model.Survey required-type : com.adaptavist.confluence.survey.model.Survey converter-type : com.thoughtworks.xstream.converters.reflection.ReflectionConverter path : /com.adaptavist.confluence.survey.model.Survey/sections line number : 7 version : not available -------------------------------
at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(

caused by: com.thoughtworks.xstream.mapper.CannotResolveClassException: java.util.Collections-SynchronizedMap
at com.thoughtworks.xstream.mapper.DefaultMapper.realClass(

I've able to workaround this issue by downgrading x-stream lib from 1.4.5 to 1.2

Is it safe way to deal with the problem?

1 answer

1 accepted

Hi Alexander,

We have already developed a patch for this issue and it will be tested and released to the MarketPlace during the following weeks.

Unfortunately this workaround will not cover every possible scenario so in case you have specific needs, please get in touch with us via our contact-us form ( and our support team will be happy to deal with your query.

Thanks and apologies for any inconvenience caused.

Suggest an answer

Log in or Sign up to answer
Atlassian Community Anniversary

Happy Anniversary, Atlassian Community!

This community is celebrating its one-year anniversary and Atlassian co-founder Mike Cannon-Brookes has all the feels.

Read more
Community showcase
Kesha Thillainayagam
Posted Apr 13, 2018 in Confluence

We want to hear how your non-technical teams are using Confluence!

Hi Community! Kesha (kay-sha) from the Confluence marketing team here! Can you share stories with us on how your non-technical (think Marketing, Sales, HR, legal, etc.) teams are using Confluen...

2,831 views 27 11
Join discussion

Atlassian User Groups

Connect with like-minded Atlassian users at free events near you!

Find a group

Connect with like-minded Atlassian users at free events near you!

Find my local user group

Unfortunately there are no AUG chapters near you at the moment.

Start an AUG

You're one step closer to meeting fellow Atlassian users at your local meet up. Learn more about AUGs

Groups near you