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https://issues.apache.org/jira/browse/AMQ-6216?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15198348#comment-15198348
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Yurii Kartsev commented on AMQ-6216:
------------------------------------
Update: after I simply restart the node which I manually shut down, infinite
log from above becomes like this:{code}leveldb.replicated.MasterLevelDBStore |
ActiveMQ BrokerService[localhost] Task-2
2016-03-16 18:37:59,471 | WARN | Store update waiting on 1 replica(s) to catch
up to log position 12074259. |
org.apache.activemq.leveldb.replicated.MasterLevelDBStore | ActiveMQ
BrokerService[localhost] Task-2
2016-03-16 18:38:00,472 | WARN | Store update waiting on 1 replica(s) to catch
up to log position 12074259. |
org.apache.activemq.leveldb.replicated.MasterLevelDBStore | ActiveMQ
BrokerService[localhost] Task-2
2016-03-16 18:38:00,724 | INFO | Slave has connected:
16d6d243-80b5-47ea-b46e-45e6e13ae18f |
org.apache.activemq.leveldb.replicated.MasterLevelDBStore |
hawtdispatch-DEFAULT-2
2016-03-16 18:38:00,841 | INFO | Slave has now caught up:
16d6d243-80b5-47ea-b46e-45e6e13ae18f |
org.apache.activemq.leveldb.replicated.MasterLevelDBStore |
hawtdispatch-DEFAULT-2
2016-03-16 18:38:00,985 | INFO | Apache ActiveMQ 5.13.2 (localhost,
ID:LM-CN64-34633-1458167880858-0:1) is starting |
org.apache.activemq.broker.BrokerService | main
2016-03-16 18:38:01,633 | INFO | Listening for connections at:
tcp://LM-CN64:61616?maximumConnections=1000&wireFormat.maxFrameSize=104857600 |
org.apache.activemq.transport.TransportServerThreadSupport | main
2016-03-16 18:38:01,634 | INFO | Connector openwire started |
org.apache.activemq.broker.TransportConnector | main
2016-03-16 18:38:01,636 | INFO | Apache ActiveMQ 5.13.2 (localhost,
ID:LM-CN64-34633-1458167880858-0:1) started |
org.apache.activemq.broker.BrokerService | main
2016-03-16 18:38:01,636 | INFO | For help or more information please see:
http://activemq.apache.org | org.apache.activemq.broker.BrokerService | main
2016-03-16 18:38:01,637 | WARN | Store limit is 102400 mb (current store usage
is 100 mb). The data directory: /home/yury/Documents/levelDB only has 50505 mb
of usable space. - resetting to maximum available disk space: 50505 mb |
org.apache.activemq.broker.BrokerService | main
2016-03-16 18:38:01,639 | WARN | Temporary Store limit is 51200 mb (current
store usage is 100 mb). The data directory:
/home/yury/Documents/apache-activemq-5.13.2/data only has 50505 mb of usable
space. - resetting to maximum available disk space: 50505 mb |
org.apache.activemq.broker.BrokerService | main
2016-03-16 18:38:02,204 | INFO | No Spring WebApplicationInitializer types
detected on classpath | /admin | main
2016-03-16 18:38:02,364 | INFO | ActiveMQ WebConsole available at
http://0.0.0.0:8161/ | org.apache.activemq.web.WebConsoleStarter | main
2016-03-16 18:38:02,364 | INFO | ActiveMQ Jolokia REST API available at
http://0.0.0.0:8161/api/jolokia/ | org.apache.activemq.web.WebConsoleStarter |
main
2016-03-16 18:38:02,397 | INFO | Initializing Spring FrameworkServlet
'dispatcher' | /admin | main
2016-03-16 18:38:02,772 | INFO | No Spring WebApplicationInitializer types
detected on classpath | /api | main
2016-03-16 18:38:02,818 | INFO | jolokia-agent: Using policy access restrictor
classpath:/jolokia-access.xml | /api | main{code}
Plus my client which was sending lot of messages to the queue is ab;e to
reconnect (because it's using "failover" protocol).
I assume this is related to intense data input to the master node which can't
get copied to slaves in time due to master shut down. But I think this should
be robust enough to survive not only manual master shutdowns, but also
immediate master loss like during network failure. But I maybe just doing
something wrong here... Could you please advise?
> Slave can't become master due to infinite "Store update waiting on 1
> replica(s) to catch up to log position XXX" in replicated LevelDB Store mode.
> --------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: AMQ-6216
> URL: https://issues.apache.org/jira/browse/AMQ-6216
> Project: ActiveMQ
> Issue Type: Bug
> Affects Versions: 5.13.2
> Reporter: Yurii Kartsev
>
> Good afternoon dear ActiveMQ support.
> I wanted to test newest ActiveMQ version for stability in Replicated LevelDB
> Store mode in order to know whether we can upgrade our production copy (since
> it has similar issues as well), but facing an issue. I am able to reproduce
> it, so it's not sporadic. It happens when under load I manually shut down
> master node and new master can not be selected having infinite logging as
> follows (log taken from initial slave which is promoted to master
> later):{code}yury@LM-CN64 ~/Documents/apache-activemq-5.13.2/bin $ tail -f
> ../data/activemq.log
> 2016-03-16 18:07:34,026 | INFO | Client
> environment:os.version=3.13.0-37-generic | org.apache.zookeeper.ZooKeeper |
> main
> 2016-03-16 18:07:34,027 | INFO | Client environment:user.name=yury |
> org.apache.zookeeper.ZooKeeper | main
> 2016-03-16 18:07:34,028 | INFO | Client environment:user.home=/home/yury |
> org.apache.zookeeper.ZooKeeper | main
> 2016-03-16 18:07:34,031 | INFO | Client
> environment:user.dir=/home/yury/Documents/apache-activemq-5.13.2/bin |
> org.apache.zookeeper.ZooKeeper | main
> 2016-03-16 18:07:34,033 | INFO | Initiating client connection,
> connectString=10.100.211.233:2181 sessionTimeout=2000
> watcher=org.apache.activemq.leveldb.replicated.groups.ZKClient@4770c18a |
> org.apache.zookeeper.ZooKeeper | main
> 2016-03-16 18:07:34,049 | WARN | SASL configuration failed:
> javax.security.auth.login.LoginException: No JAAS configuration section named
> 'Client' was found in specified JAAS configuration file:
> '/home/yury/Documents/apache-activemq-5.13.2//conf/login.config'. Will
> continue connection to Zookeeper server without SASL authentication, if
> Zookeeper server allows it. | org.apache.zookeeper.ClientCnxn |
> main-SendThread(10.100.211.233:2181)
> 2016-03-16 18:07:34,052 | INFO | Opening socket connection to server
> 10.100.211.233/10.100.211.233:2181 | org.apache.zookeeper.ClientCnxn |
> main-SendThread(10.100.211.233:2181)
> 2016-03-16 18:07:34,052 | WARN | unprocessed event state: AuthFailed |
> org.apache.activemq.leveldb.replicated.groups.ZKClient | main-EventThread
> 2016-03-16 18:07:34,056 | INFO | Socket connection established to
> 10.100.211.233/10.100.211.233:2181, initiating session |
> org.apache.zookeeper.ClientCnxn | main-SendThread(10.100.211.233:2181)
> 2016-03-16 18:07:34,066 | INFO | Session establishment complete on server
> 10.100.211.233/10.100.211.233:2181, sessionid = 0x1537b47772c0007, negotiated
> timeout = 4000 | org.apache.zookeeper.ClientCnxn |
> main-SendThread(10.100.211.233:2181)
> 2016-03-16 18:07:34,682 | INFO | Using the pure java LevelDB implementation.
> | org.apache.activemq.leveldb.LevelDBClient | ActiveMQ
> BrokerService[localhost] Task-1
> 2016-03-16 18:07:34,694 | INFO | Attaching to master:
> tcp://10.100.211.233:61619 |
> org.apache.activemq.leveldb.replicated.SlaveLevelDBStore | ActiveMQ
> BrokerService[localhost] Task-1
> 2016-03-16 18:07:34,703 | INFO | Slave started |
> org.apache.activemq.leveldb.replicated.MasterElector | ActiveMQ
> BrokerService[localhost] Task-1
> 2016-03-16 18:07:34,800 | INFO | Slave skipping download of:
> log/0000000000000000.log |
> org.apache.activemq.leveldb.replicated.SlaveLevelDBStore |
> hawtdispatch-DEFAULT-1
> 2016-03-16 18:07:34,812 | INFO | Slave requested:
> 00000000006399f2.index/CURRENT |
> org.apache.activemq.leveldb.replicated.SlaveLevelDBStore |
> hawtdispatch-DEFAULT-1
> 2016-03-16 18:07:34,815 | INFO | Slave requested:
> 00000000006399f2.index/000003.log |
> org.apache.activemq.leveldb.replicated.SlaveLevelDBStore |
> hawtdispatch-DEFAULT-1
> 2016-03-16 18:07:34,816 | INFO | Slave requested:
> 00000000006399f2.index/MANIFEST-000002 |
> org.apache.activemq.leveldb.replicated.SlaveLevelDBStore |
> hawtdispatch-DEFAULT-1
> 2016-03-16 18:07:34,826 | INFO | Attaching... Downloaded 0.02/28.37 kb and
> 1/3 files | org.apache.activemq.leveldb.replicated.SlaveLevelDBStore |
> hawtdispatch-DEFAULT-1
> 2016-03-16 18:07:34,827 | INFO | Attaching... Downloaded 28.32/28.37 kb and
> 2/3 files | org.apache.activemq.leveldb.replicated.SlaveLevelDBStore |
> hawtdispatch-DEFAULT-1
> 2016-03-16 18:07:34,829 | INFO | Attaching... Downloaded 28.37/28.37 kb and
> 3/3 files | org.apache.activemq.leveldb.replicated.SlaveLevelDBStore |
> hawtdispatch-DEFAULT-1
> 2016-03-16 18:07:34,830 | INFO | Attached |
> org.apache.activemq.leveldb.replicated.SlaveLevelDBStore |
> hawtdispatch-DEFAULT-1
> 2016-03-16 18:15:11,459 | INFO | Not enough cluster members have reported
> their update positions yet. |
> org.apache.activemq.leveldb.replicated.MasterElector | main-EventThread
> 2016-03-16 18:15:11,527 | INFO | Slave stopped |
> org.apache.activemq.leveldb.replicated.MasterElector | ActiveMQ
> BrokerService[localhost] Task-2
> 2016-03-16 18:15:11,529 | INFO | Not enough cluster members have reported
> their update positions yet. |
> org.apache.activemq.leveldb.replicated.MasterElector | ActiveMQ
> BrokerService[localhost] Task-2
> 2016-03-16 18:15:11,534 | INFO | Not enough cluster members have reported
> their update positions yet. |
> org.apache.activemq.leveldb.replicated.MasterElector | main-EventThread
> 2016-03-16 18:15:11,594 | INFO | Promoted to master |
> org.apache.activemq.leveldb.replicated.MasterElector | main-EventThread
> 2016-03-16 18:15:11,616 | INFO | Using the pure java LevelDB implementation.
> | org.apache.activemq.leveldb.LevelDBClient | ActiveMQ
> BrokerService[localhost] Task-2
> 2016-03-16 18:15:12,066 | INFO | Master started: tcp://10.211.55.5:61619 |
> org.apache.activemq.leveldb.replicated.MasterElector | ActiveMQ
> BrokerService[localhost] Task-3
> 2016-03-16 18:15:13,069 | WARN | Store update waiting on 1 replica(s) to
> catch up to log position 12074259. |
> org.apache.activemq.leveldb.replicated.MasterLevelDBStore | ActiveMQ
> BrokerService[localhost] Task-2
> 2016-03-16 18:15:14,071 | WARN | Store update waiting on 1 replica(s) to
> catch up to log position 12074259. |
> org.apache.activemq.leveldb.replicated.MasterLevelDBStore | ActiveMQ
> BrokerService[localhost] Task-2
> 2016-03-16 18:15:15,072 | WARN | Store update waiting on 1 replica(s) to
> catch up to log position 12074259. |
> org.apache.activemq.leveldb.replicated.MasterLevelDBStore | ActiveMQ
> BrokerService[localhost] Task-2
> 2016-03-16 18:15:16,074 | WARN | Store update waiting on 1 replica(s) to
> catch up to log position 12074259. |
> org.apache.activemq.leveldb.replicated.MasterLevelDBStore | ActiveMQ
> BrokerService[localhost] Task-2
> 2016-03-16 18:15:17,076 | WARN | Store update waiting on 1 replica(s) to
> catch up to log position 12074259. |
> org.apache.activemq.leveldb.replicated.MasterLevelDBStore | ActiveMQ
> BrokerService[localhost] Task-2
> 2016-03-16 18:15:18,078 | WARN | Store update waiting on 1 replica(s) to
> catch up to log position 12074259. |
> org.apache.activemq.leveldb.replicated.MasterLevelDBStore | ActiveMQ
> BrokerService[localhost] Task-2
> 2016-03-16 18:15:19,080 | WARN | Store update waiting on 1 replica(s) to
> catch up to log position 12074259. |
> org.apache.activemq.leveldb.replicated.MasterLevelDBStore | ActiveMQ
> BrokerService[localhost] Task-2
> 2016-03-16 18:15:20,081 | WARN | Store update waiting on 1 replica(s) to
> catch up to log position 12074259. |
> org.apache.activemq.leveldb.replicated.MasterLevelDBStore | ActiveMQ
> BrokerService[localhost] Task-2
> 2016-03-16 18:15:21,083 | WARN | Store update waiting on 1 replica(s) to
> catch up to log position 12074259. |
> org.apache.activemq.leveldb.replicated.MasterLevelDBStore | ActiveMQ
> BrokerService[localhost] Task-2
> 2016-03-16 18:15:22,085 | WARN | Store update waiting on 1 replica(s) to
> catch up to log position 12074259. |
> org.apache.activemq.leveldb.replicated.MasterLevelDBStore | ActiveMQ
> BrokerService[localhost] Task-2
> 2016-03-16 18:15:23,087 | WARN | Store update waiting on 1 replica(s) to
> catch up to log position 12074259. |
> org.apache.activemq.leveldb.replicated.MasterLevelDBStore | ActiveMQ
> BrokerService[localhost] Task-2
> 2016-03-16 18:15:24,089 | WARN | Store update waiting on 1 replica(s) to
> catch up to log position 12074259. |
> org.apache.activemq.leveldb.replicated.MasterLevelDBStore | ActiveMQ
> BrokerService[localhost] Task-2
> 2016-03-16 18:15:25,091 | WARN | Store update waiting on 1 replica(s) to
> catch up to log position 12074259. |
> org.apache.activemq.leveldb.replicated.MasterLevelDBStore | ActiveMQ
> BrokerService[localhost] Task-2
> 2016-03-16 18:15:26,092 | WARN | Store update waiting on 1 replica(s) to
> catch up to log position 12074259. |
> org.apache.activemq.leveldb.replicated.MasterLevelDBStore | ActiveMQ
> BrokerService[localhost] Task-2
> 2016-03-16 18:15:27,095 | WARN | Store update waiting on 1 replica(s) to
> catch up to log position 12074259. |
> org.apache.activemq.leveldb.replicated.MasterLevelDBStore | ActiveMQ
> BrokerService[localhost] Task-2
> 2016-03-16 18:15:28,097 | WARN | Store update waiting on 1 replica(s) to
> catch up to log position 12074259. |
> org.apache.activemq.leveldb.replicated.MasterLevelDBStore | ActiveMQ
> BrokerService[localhost] Task-2
> 2016-03-16 18:15:29,098 | WARN | Store update waiting on 1 replica(s) to
> catch up to log position 12074259. |
> org.apache.activemq.leveldb.replicated.MasterLevelDBStore | ActiveMQ
> BrokerService[localhost] Task-2
> 2016-03-16 18:15:30,100 | WARN | Store update waiting on 1 replica(s) to
> catch up to log position 12074259. |
> org.apache.activemq.leveldb.replicated.MasterLevelDBStore | ActiveMQ
> BrokerService[localhost] Task-2
> 2016-03-16 18:15:31,101 | WARN | Store update waiting on 1 replica(s) to
> catch up to log position 12074259. |
> org.apache.activemq.leveldb.replicated.MasterLevelDBStore | ActiveMQ
> BrokerService[localhost] Task-2
> 2016-03-16 18:15:32,102 | WARN | Store update waiting on 1 replica(s) to
> catch up to log position 12074259. |
> org.apache.activemq.leveldb.replicated.MasterLevelDBStore | ActiveMQ
> BrokerService[localhost] Task-2
> 2016-03-16 18:15:33,103 | WARN | Store update waiting on 1 replica(s) to
> catch up to log position 12074259. |
> org.apache.activemq.leveldb.replicated.MasterLevelDBStore | ActiveMQ
> BrokerService[localhost] Task-2
> 2016-03-16 18:15:34,104 | WARN | Store update waiting on 1 replica(s) to
> catch up to log position 12074259. |
> org.apache.activemq.leveldb.replicated.MasterLevelDBStore | ActiveMQ
> BrokerService[localhost] Task-2
> 2016-03-16 18:15:35,106 | WARN | Store update waiting on 1 replica(s) to
> catch up to log position 12074259. |
> org.apache.activemq.leveldb.replicated.MasterLevelDBStore | ActiveMQ
> BrokerService[localhost] Task-2
> 2016-03-16 18:15:36,108 | WARN | Store update waiting on 1 replica(s) to
> catch up to log position 12074259. |
> org.apache.activemq.leveldb.replicated.MasterLevelDBStore | ActiveMQ
> BrokerService[localhost] Task-2
> 2016-03-16 18:15:37,110 | WARN | Store update waiting on 1 replica(s) to
> catch up to log position 12074259. |
> org.apache.activemq.leveldb.replicated.MasterLevelDBStore | ActiveMQ
> BrokerService[localhost] Task-2
> 2016-03-16 18:15:38,112 | WARN | Store update waiting on 1 replica(s) to
> catch up to log position 12074259. |
> org.apache.activemq.leveldb.replicated.MasterLevelDBStore | ActiveMQ
> BrokerService[localhost] Task-2
> 2016-03-16 18:15:39,113 | WARN | Store update waiting on 1 replica(s) to
> catch up to log position 12074259. |
> org.apache.activemq.leveldb.replicated.MasterLevelDBStore | ActiveMQ
> BrokerService[localhost] Task-2
> 2016-03-16 18:15:40,115 | WARN | Store update waiting on 1 replica(s) to
> catch up to log position 12074259. |
> org.apache.activemq.leveldb.replicated.MasterLevelDBStore | ActiveMQ
> BrokerService[localhost] Task-2
> 2016-03-16 18:15:41,117 | WARN | Store update waiting on 1 replica(s) to
> catch up to log position 12074259. |
> org.apache.activemq.leveldb.replicated.MasterLevelDBStore | ActiveMQ
> BrokerService[localhost] Task-2
> 2016-03-16 18:15:42,119 | WARN | Store update waiting on 1 replica(s) to
> catch up to log position 12074259. |
> org.apache.activemq.leveldb.replicated.MasterLevelDBStore | ActiveMQ
> BrokerService[localhost] Task-2
> 2016-03-16 18:15:43,120 | WARN | Store update waiting on 1 replica(s) to
> catch up to log position 12074259. |
> org.apache.activemq.leveldb.replicated.MasterLevelDBStore | ActiveMQ
> BrokerService[localhost] Task-2
> 2016-03-16 18:15:44,121 | WARN | Store update waiting on 1 replica(s) to
> catch up to log position 12074259. |
> org.apache.activemq.leveldb.replicated.MasterLevelDBStore | ActiveMQ
> BrokerService[localhost] Task-2
> 2016-03-16 18:15:45,122 | WARN | Store update waiting on 1 replica(s) to
> catch up to log position 12074259. |
> org.apache.activemq.leveldb.replicated.MasterLevelDBStore | ActiveMQ
> BrokerService[localhost] Task-2
> 2016-03-16 18:15:46,123 | WARN | Store update waiting on 1 replica(s) to
> catch up to log position 12074259. |
> org.apache.activemq.leveldb.replicated.MasterLevelDBStore | ActiveMQ
> BrokerService[localhost] Task-2
> 2016-03-16 18:15:47,124 | WARN | Store update waiting on 1 replica(s) to
> catch up to log position 12074259. |
> org.apache.activemq.leveldb.replicated.MasterLevelDBStore | ActiveMQ
> BrokerService[localhost] Task-2
> 2016-03-16 18:15:48,125 | WARN | Store update waiting on 1 replica(s) to
> catch up to log position 12074259. |
> org.apache.activemq.leveldb.replicated.MasterLevelDBStore | ActiveMQ
> BrokerService[localhost] Task-2
> 2016-03-16 18:15:49,126 | WARN | Store update waiting on 1 replica(s) to
> catch up to log position 12074259. |
> org.apache.activemq.leveldb.replicated.MasterLevelDBStore | ActiveMQ
> BrokerService[localhost] Task-2
> 2016-03-16 18:15:50,128 | WARN | Store update waiting on 1 replica(s) to
> catch up to log position 12074259. |
> org.apache.activemq.leveldb.replicated.MasterLevelDBStore | ActiveMQ
> BrokerService[localhost] Task-2
> 2016-03-16 18:15:51,129 | WARN | Store update waiting on 1 replica(s) to
> catch up to log position 12074259. |
> org.apache.activemq.leveldb.replicated.MasterLevelDBStore | ActiveMQ
> BrokerService[localhost] Task-2
> 2016-03-16 18:15:52,130 | WARN | Store update waiting on 1 replica(s) to
> catch up to log position 12074259. |
> org.apache.activemq.leveldb.replicated.MasterLevelDBStore | ActiveMQ
> BrokerService[localhost] Task-2
> 2016-03-16 18:15:53,131 | WARN | Store update waiting on 1 replica(s) to
> catch up to log position 12074259. |
> org.apache.activemq.leveldb.replicated.MasterLevelDBStore | ActiveMQ
> BrokerService[localhost] Task-2
> 2016-03-16 18:15:54,132 | WARN | Store update waiting on 1 replica(s) to
> catch up to log position 12074259. |
> org.apache.activemq.leveldb.replicated.MasterLevelDBStore | ActiveMQ
> BrokerService[localhost] Task-2
> 2016-03-16 18:15:55,133 | WARN | Store update waiting on 1 replica(s) to
> catch up to log position 12074259. |
> org.apache.activemq.leveldb.replicated.MasterLevelDBStore | ActiveMQ
> BrokerService[localhost] Task-2
> 2016-03-16 18:15:56,134 | WARN | Store update waiting on 1 replica(s) to
> catch up to log position 12074259. |
> org.apache.activemq.leveldb.replicated.MasterLevelDBStore | ActiveMQ
> BrokerService[localhost] Task-2
> 2016-03-16 18:15:57,136 | WARN | Store update waiting on 1 replica(s) to
> catch up to log position 12074259. |
> org.apache.activemq.leveldb.replicated.MasterLevelDBStore | ActiveMQ
> BrokerService[localhost] Task-2
> 2016-03-16 18:15:58,137 | WARN | Store update waiting on 1 replica(s) to
> catch up to log position 12074259. |
> org.apache.activemq.leveldb.replicated.MasterLevelDBStore | ActiveMQ
> BrokerService[localhost] Task-2
> 2016-03-16 18:15:59,139 | WARN | Store update waiting on 1 replica(s) to
> catch up to log position 12074259. |
> org.apache.activemq.leveldb.replicated.MasterLevelDBStore | ActiveMQ
> BrokerService[localhost] Task-2
> 2016-03-16 18:16:00,140 | WARN | Store update waiting on 1 replica(s) to
> catch up to log position 12074259. |
> org.apache.activemq.leveldb.replicated.MasterLevelDBStore | ActiveMQ
> BrokerService[localhost] Task-2
> 2016-03-16 18:16:01,142 | WARN | Store update waiting on 1 replica(s) to
> catch up to log position 12074259. |
> org.apache.activemq.leveldb.replicated.MasterLevelDBStore | ActiveMQ
> BrokerService[localhost] Task-2
> 2016-03-16 18:16:02,144 | WARN | Store update waiting on 1 replica(s) to
> catch up to log position 12074259. |
> org.apache.activemq.leveldb.replicated.MasterLevelDBStore | ActiveMQ
> BrokerService[localhost] Task-2
> 2016-03-16 18:16:03,145 | WARN | Store update waiting on 1 replica(s) to
> catch up to log position 12074259. |
> org.apache.activemq.leveldb.replicated.MasterLevelDBStore | ActiveMQ
> BrokerService[localhost] Task-2
> 2016-03-16 18:16:04,146 | WARN | Store update waiting on 1 replica(s) to
> catch up to log position 12074259. |
> org.apache.activemq.leveldb.replicated.MasterLevelDBStore | ActiveMQ
> BrokerService[localhost] Task-2
> ...{code}
> Steps to reproduce:
> 1. Start one ZK node. Set up ActiveMQ cluster in Replicated LevelDB Store
> mode as described
> [here|http://activemq.apache.org/replicated-leveldb-store.html]. My cluster
> contains of 3 nodes: Mac OS X + Windows + Linux Mint. In my case Mac OS X
> node was started first and becomes initial master.
> 2. Start a process which constantly adds messages to a single queue using URL
> as "failover(...)".
> 3. In the middle of that process shut down current master node (activemq stop)
> 4. Observe log from above on one of the slave nodes.
> My activeMQ and levelDB is a fresh copy - just downloaded and installed it.
> My ZK version is 3.4.6.
> Please ask for any additional data you need - I will be able to provide it.
> Thank you very much for your help in advance.
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