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java.util.ConcurrentModificationException at java.util.LinkedHashMap$LinkedHashIterator.nextNode( at java.util.LinkedHashMap$ at org.springframework.jms.connection.SingleConnectionFactory$AggregatedExceptionListener.onException( at org.apache.activemq.ActiveMQConnection$ at java.util.concurrent.ThreadPoolExecutor.runWorker( at java.util.concurrent.ThreadPoolExecutor$ at