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https://issues.apache.org/jira/browse/AMQ-5249?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14539485#comment-14539485
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Jo Geraerts commented on AMQ-5249:
----------------------------------

Bouncing into the same issue on activemq 5.9.0

{code}
JBossFuse:admin@root> list -t 0 | grep active
[ 131] [Active     ] [Created     ] [       ] [   50] activemq-osgi 
(5.9.0.redhat-610379)
[ 137] [Active     ] [            ] [       ] [   50] activeio-core (3.1.4)
[ 139] [Active     ] [Created     ] [       ] [   50] activemq-karaf 
(5.9.0.redhat-610379)
[ 207] [Active     ] [            ] [       ] [   60] activemq-camel 
(5.9.0.redhat-610379)
{code}

{code}
fuseesb.log.2015-04-30.gz:13:15:35,941 | WARN  | 344189615-182566 | 
AbstractStoreCursor              | 131 - org.apache.activemq.activemq-osgi - 
5.9.0.redhat-610379 | 
org.apache.activemq.broker.region.cursors.QueueStorePrefetch@8ec707b:Pim.Plu.Hybris,batchResetNeeded=false,storeHasMessages=false,size=5,cacheEnabled=true,maxBatchSize:5,hasSpace:true
 - cursor got duplicate: ID:prd-esb-inno1-37535-1429248180616-5:4:6:1:3, 4
fuseesb.log.2015-04-30.gz:13:15:36,003 | WARN  | 344189615-182566 | 
AbstractStoreCursor              | 131 - org.apache.activemq.activemq-osgi - 
5.9.0.redhat-610379 | 
org.apache.activemq.broker.region.cursors.QueueStorePrefetch@8ec707b:Pim.Plu.Hybris,batchResetNeeded=false,storeHasMessages=false,size=6,cacheEnabled=true,maxBatchSize:6,hasSpace:true
 - cursor got duplicate: ID:prd-esb-inno1-37535-1429248180616-5:5:7:1:62, 4
fuseesb.log.2015-04-30.gz:13:15:36,066 | WARN  | 344189615-182566 | 
AbstractStoreCursor              | 131 - org.apache.activemq.activemq-osgi - 
5.9.0.redhat-610379 | 
org.apache.activemq.broker.region.cursors.QueueStorePrefetch@8ec707b:Pim.Plu.Hybris,batchResetNeeded=false,storeHasMessages=false,size=7,cacheEnabled=true,maxBatchSize:7,hasSpace:true
 - cursor got duplicate: ID:prd-esb-inno1-60724-1429933192681-1:3:5:1:837, 4
{code}

Occurs both for topics as queues. 

We are using mysql as store, with 2 nodes in failover. 

> "cursor got duplicate" error after upgrade
> ------------------------------------------
>
>                 Key: AMQ-5249
>                 URL: https://issues.apache.org/jira/browse/AMQ-5249
>             Project: ActiveMQ
>          Issue Type: Bug
>    Affects Versions: 5.9.1, 5.10.0
>            Reporter: Rural Hunter
>
> I was using 5.9.0 and meet one problem so I tried to upgrade activemq. I 
> tried both 5.9.1 and 5.10.0 and encouterred a same problem. I saw messages 
> filled DLQ very quickly. I checked the clients both producer and consumer but 
> there was no error. I checked activemq log and found the log is full of these 
> warnings:
> 2014-06-27 23:22:09,337 | WARN  | 
> org.apache.activemq.broker.region.cursors.QueueStorePrefetch@19117501:com.cyyun.webmon.spider.update,batchResetNeeded=false,storeHasMessages=true,size=211,cacheEnabled=true,maxBatchSize:200,hasSpace:true
>  - cursor got duplicate: ID:211.com-52399-1400732399425-1:1:235992:1:1, 4 | 
> org.apache.activemq.broker.region.cursors.AbstractStoreCursor | ActiveMQ 
> Broker[localhost] Scheduler
> 2014-06-27 23:22:09,337 | WARN  | 
> org.apache.activemq.broker.region.cursors.QueueStorePrefetch@19117501:com.xxxx.update,batchResetNeeded=false,storeHasMessages=true,size=211,cacheEnabled=true,maxBatchSize:200,hasSpace:true
>  - cursor got duplicate: ID:nbzjjf22805-34129-1403880308671-1:1:28:1:1, 4 | 
> org.apache.activemq.broker.region.cursors.AbstractStoreCursor | ActiveMQ 
> Broker[localhost] Scheduler
> 2014-06-27 23:22:09,338 | WARN  | 
> org.apache.activemq.broker.region.cursors.QueueStorePrefetch@19117501:com.xxxxx.update,batchResetNeeded=false,storeHasMessages=true,size=211,cacheEnabled=true,maxBatchSize:200,hasSpace:true
>  - cursor got duplicate: ID:jxncxnj2-48598-1403856107346-1:1:6007:1:1, 4 | 
> org.apache.activemq.broker.region.cursors.AbstractStoreCursor | ActiveMQ 
> Broker[localhost] Scheduler
> 2014-06-27 23:22:09,338 | WARN  | 
> org.apache.activemq.broker.region.cursors.QueueStorePrefetch@19117501:com.xxxx.update,batchResetNeeded=false,storeHasMessages=true,size=211,cacheEnabled=true,maxBatchSize:200,hasSpace:true
>  - cursor got duplicate: ID:jxnc17-60227-1400730816361-1:1:149072:1:1, 4 | 
> org.apache.activemq.broker.region.cursors.AbstractStoreCursor | ActiveMQ 
> Broker[localhost] Scheduler
> 2014-06-27 23:22:09,339 | WARN  | 
> org.apache.activemq.broker.region.cursors.QueueStorePrefetch@19117501:com.xxxx.update,batchResetNeeded=false,storeHasMessages=true,size=211,cacheEnabled=true,maxBatchSize:200,hasSpace:true
>  - cursor got duplicate: ID:cyyun-46954-1403800808565-1:1:9765:1:1, 4 | 
> org.apache.activemq.broker.region.cursors.AbstractStoreCursor | ActiveMQ 
> Broker[localhost] Scheduler
> 2014-06-27 23:22:09,339 | WARN  | 
> org.apache.activemq.broker.region.cursors.QueueStorePrefetch@19117501:com.xxxx.update,batchResetNeeded=false,storeHasMessages=true,size=211,cacheEnabled=true,maxBatchSize:200,hasSpace:true
>  - cursor got duplicate: ID:ubuntu-55495-1403497638437-1:1:53086:1:1, 4 | 
> org.apache.activemq.broker.region.cursors.AbstractStoreCursor | ActiveMQ 
> Broker[localhost] Scheduler
> 2014-06-27 23:22:09,340 | WARN  | 
> org.apache.activemq.broker.region.cursors.QueueStorePrefetch@19117501:com.xxxx.update,batchResetNeeded=false,storeHasMessages=true,size=211,cacheEnabled=true,maxBatchSize:200,hasSpace:true
>  - cursor got duplicate: ID:cyyun-39030-1403880008363-1:1:70:1:1, 4 | 
> org.apache.activemq.broker.region.cursors.AbstractStoreCursor | ActiveMQ 
> Broker[localhost] Scheduler
> The problem mostly happens right after activemq starts and sometimes happened 
> after activemq worked normally for a while.
> For now I have to roll back to 5.9.0 and the problem doesn't occure.



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