This is a frustrating little bug because it forces you to look at the logs for any insight into what happened - the error message in the exception you get with Solrj is very generic.
|Status||Open [ 1 ]||Resolved [ 5 ]|
|Resolution||Fixed [ 1 ]|
|Transition||Time In Source Status||Execution Times||Last Executer||Last Execution Date|
|19h 16m||1||Mark Miller||30/Sep/13 15:02|