[ARTEMIS-1982] Queue#MessageCount negative and messages stop flowing to AMQP consumer

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.5.0, 2.6.2
• Fix Version/s: 2.10.0
• Assignee: Justin Bertram
• Reporter: Keith Wall
• Created: 19/Jul/18 13:52
• Updated: 26/Aug/19 15:50
• Resolved: 26/Aug/19 15:50

Description

I am running performance tests against EnMasse which currently uses Artemis 2.5.0.   Many millions of messages have traversed the Broker (all AMQP protocol).

 

I have encountered a situation where messages have stopped flowing to the AMQP consumer.  On inspection of the Artemis console, I notice that statistics including the MessageCount have gone negative (-99). One in this state, I notice if I produce one message  then attach a consumer, no message flows.  However if add two messages to the queue, the consumer gets only the 2nd message.  The first message is seemingly lost.

I've seen this situation once.

 

bash-4.2$ curl --user admin:admin -k https://localhost:8161/console/jolokia/read/org.apache.activemq.artemis:broker=%22broker-0%22,component=addresses,address=%22queue%22,subcomponent=queues,routing-type=%22anycast%22,queue=%22queue%22

 

{
"request": {
"mbean": "org.apache.activemq.artemis:address=\"queue\",broker=\"broker-0\",component=addresses,queue=\"queue\",routing-type=\"anycast\",subcomponent=queues",
"type": "read"
},
"value": {
"User": "null",
"MaxConsumers": -1,
"Address": "queue",
"Exclusive": false,
"PurgeOnNoConsumers": false,
"DurableDeliveringSize": 0,
"PersistentSize": -68112,
"ScheduledCount": 0,
"MessagesKilled": 99,
"Name": "queue",
"DurableScheduledCount": 0,
"DurableMessageCount": 0,
"ExpiryAddress": null,
"ID": 6,
"FirstMessageAsJSON": "[{}]",
"RoutingType": "ANYCAST",
"Paused": false,
"DurableDeliveringCount": 0,
"FirstMessageAge": null,
"DeadLetterAddress": "DLQ",
"DurablePersistentSize": 0,
"MessagesAdded": 39470041,
"ConsumerCount": 1,
"DeliveringCount": -99,
"MessagesAcknowledged": 39469942,
"MessagesExpired": 0,
"DeliveringSize": -68112,
"LastValue": false,
"Temporary": false,
"FirstMessageTimestamp": null,
"Filter": null,
"ScheduledSize": 0,
"Durable": true,
"DurableScheduledSize": 0,
"MessageCount": -99
},
"timestamp": 1532007015,
"status": 200
}

Issue Links

• links to: GitHub Pull Request #2700