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  1. JBoss A-MQ
  2. ENTMQ-2079

Too many instances of "duplicate message ... from cursor"

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    • Workaround Exists
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      configure KahaDB with concurrentStoreAndDispatchQueues="false"

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      configure KahaDB with concurrentStoreAndDispatchQueues="false"
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      Use unit test provided in attachment junit-duplicate-message.tgz . Simply unzip and run mvn clean test and wait for the above warning to occur many times.
      This unit test starts 100 producers and 10 consumers all producing to / consuming from the same queue.

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      Use unit test provided in attachment junit-duplicate-message.tgz . Simply unzip and run mvn clean test and wait for the above warning to occur many times. This unit test starts 100 producers and 10 consumers all producing to / consuming from the same queue.

      In a high throughput scenario on a single destination there can be many warnings of this kind:

      [2017-03-21 09:51:37,548] WARN ActiveMQ BrokerService[localhost] Task-5 Queue - queue://TEST, subscriptions=10, memory=102%, size=399, 
pending=0, duplicate message ActiveMQTextMessage {commandId = 72, responseRequired = true, 
messageId = ID:Mac.fritz.box-64479-1490086286066-183:1:1:1:68, originalDestination = null, originalTransactionId = null, 
producerId = ID:Mac.fritz.box-64479-1490086286066-183:1:1:1, destination = queue://TEST, transactionId = null, expiration = 0, 
timestamp = 1490086297427, arrival = 0, brokerInTime = 1490086297427, brokerOutTime = 1490086297427, correlationId = null, replyTo = null, persistent = true, 
type = null, priority = 4, groupID = null, groupSequence = 0, targetConsumerId = null, compressed = false, userID = null, 
content = org.apache.activemq.util.ByteSequence@8672edc, marshalledProperties = null, dataStructure = null, redeliveryCounter = 0, size = 50216, properties = null, 
readOnlyProperties = false, readOnlyBody = false, droppable = false, jmsXGroupFirstForConsumer = false, text = ...XXXXXXXXXXXX} 
from cursor, is cursor audit disabled or too constrained? Redirecting to dlq

      The broker loads messages twice into the cursor.

        1. junit-duplicate-message.tgz
          6 kB

              gtully@redhat.com Gary Tully
              rhn-support-tmielke Torsten Mielke
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                Created:
                Updated:
                Resolved: