Removing messages in Hawtio console causes incorrect maxBrowsePageSize generation.

* Step-1). * Take A-MQ 6.1 and then edit "activemq.xml" file to add the "maxBrowsePageSize" as 500. <policyEntry queue= ">" producerFlowControl= " true " memoryLimit= "1mb" maxBrowsePageSize= "500" > * Step-2). * Now send 520 messages to a jms queue (suppose TestQ) the jms messages should have a header set as following: public static void main( String ar[]) throws Exception { ActiveMQ_QueueSend senderAQ= new ActiveMQ_QueueSend( "admin" , "admin" , "failover: //tcp://localhost:61616" , "queue://TestQ" ); for ( int i=1; i<=520 ; i++) { senderAQ.sendTestMessage( "HelloWorld-" +i,i); } senderAQ.defaultConnection.close(); } public void sendTestMessage( String txt, int sequence) throws JMSException { TextMessage message= this .createTestMessage(txt); // JMS Message selector message.setIntProperty( "JMSXGroupSeq" ,sequence); this .producer.send(message); } * Step-3). * After sending 520 messages to TestQ, Check hawetio it shows 500 messages (so far every thing is right) http://localhost:8181/hawtio/index.html#/activemq/browseQueue?tab=activemq&nid=root-org.apache.activemq-Broker-amq-Queue-TestQ * Step-4). * Now delete some 3 messages from TestQ using operation "Remove matching messages(java.lang.string)" from the queue using the following Selector: JMSXGroupSeq between 498 and 500 Users will find 3 messages were deleted. * Step-5). * Now Browse messages again last few messages will be the following : (Notice 501 is missing) 496, 497, 502 , 503 Example: D:localhost-38909-1403756014866-1:1:1:1:503 D:localhost-38909-1403756014866-1:1:1:1:502 D:localhost-38909-1403756014866-1:1:1:1:497 D:localhost-38909-1403756014866-1:1:1:1:496 So the issue is that the "501" message is missing from the browse page.