I'm currently in the process of upgrading JIRA 6.4 to 7.0. The installation etc went smoothly, but now i'm getting the following error when trying to load a page:
2015-10-13 14:22:46,261 http-bio-18091-exec-5 ERROR [o.a.c.c.C.[.[localhost].[/].[action]] Servlet.service() for servlet [action] in context with path  threw exception
com.atlassian.cache.CacheException: com.atlassian.util.concurrent.LazyReference$InitializationException: com.atlassian.util.concurrent.LazyReference$InitializationException: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'com.atlassian.jira.toolkit.customfield.searchers.UserPickerSearcher': Bean instantiation via constructor failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.atlassian.jira.toolkit.customfield.searchers.UserPickerSearcher]: Constructor threwexception; nested exception is java.lang.NoSuchMethodError: com.atlassian.jira.issue.customfields.searchers.UserPickerSearcher.<init>(Lcom/atlassian/jira/jql/resolver/UserResolver;Lcom/atlassian/jira/jql/operand/JqlOperandResolver;Lcom/atlassian/jira/security/JiraAuthenticationContext;Lcom/atlassian/jira/issue/customfields/converters/UserConverter;Lcom/atlassian/jira/bc/user/search/UserPickerSearchService;Lcom/atlassian/jira/issue/customfields/searchers/transformer/CustomFieldInputHelper;Lcom/atlassian/jira/user/util/UserManager;Lcom/atlassian/jira/web/FieldVisibilityManager;)V
Sorry for the bad formatting/line endings. For the complete log see: http://pastebin.com/rgPE4xyv
Every pageload seems to give a slightly different error, i've left a few in there at the bottom of the log.
As far as i can tell it all comes down to:
Error creating bean with name 'com.atlassian.jira.toolkit.customfield.searchers.UserPickerSearcher'
I have googled this but can't seem to find anything useful. I've tried removing some unnessecary plugins and empty the plugin cache. Did some restarts, but no luck.
Any help would be greatly appreciated.
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