We just upgraded from JIRA 5.2 to JIRA 6.0 and now any attempt to create or edit a ticket fails with this exception:
java.lang.ClassCastException: com.atlassian.jira.user.BridgedDirectoryUser cannot be cast to java.lang.String
Any ideas of how to fix or troubleshoot this error? We've created a support request, but thinking someone might have an idea here as well.
Looking at the first part of the stacktrace:
java.lang.ClassCastException: com.atlassian.jira.user.BridgedDirectoryUser cannot be cast to java.lang.String at com.atlassian.jira.issue.customfields.impl.MultiUserCFType.putInvalidUsersAtFront(MultiUserCFType.java:291) at com.atlassian.jira.issue.customfields.impl.MultiUserCFType.getStringValueFromCustomFieldParams(MultiUserCFType.java:201) at com.atlassian.jira.issue.customfields.CustomFieldUtils.buildParams(CustomFieldUtils.java:382) at com.atlassian.jira.plugin.customfield.CustomFieldTypeModuleDescriptorImpl.getEditHtml(CustomFieldTypeModuleDescriptorImpl.java:157) at com.atlassian.jira.issue.fields.CustomFieldImpl.getEditHtml(CustomFieldImpl.java:975) at com.atlassian.jira.issue.fields.screen.AbstractFieldScreenLayoutItem.getEditHtml(AbstractFieldScreenLayoutItem.java:78) at com.atlassian.jira.issue.fields.screen.FieldScreenRenderLayoutItemImpl.getEditHtml(FieldScreenRenderLayoutItemImpl.java:62) at com.atlassian.jira.issue.fields.rest.FieldHtmlFactoryImpl.getEditFields(FieldHtmlFactoryImpl.java:151)
It looks like this error has something to do with custom fields and/or invalid users. The only other hit other than this question when Googling BridgedDirectoryUser is JRA-32514, which states that a multi-user custom field (in JRA-32514 it's a "Participant" custom field) is the cause of the problem... but we don't have a multi-user custom field. :-/
Still searching for an answer.
The watcher field plugin is mentioned several times above, and it's the one that caused it for us when I was testing an upgrade. Start with that one. It's possible it could be caused by others though, so you may want to work through any other plugins you've got in your system.
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