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https://issues.apache.org/jira/browse/AMQ-5618?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14350649#comment-14350649
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Pablo Lozano commented on AMQ-5618:
-----------------------------------
I have reported something very similar or exactly the same on issue AMQ-5553 .
On that ticket I have attached my levelDb data and configuration which might
help get information about this issue.
This issue leaves my replicas all entering the infinite loop as when each of
them becomes the master each enters the infinite loop. I have replicated this
issue on 5.10 and 5.11. Artem, you say you have steps that can easily replicate
this issue? I have been able to replicate them but seems mostly random.
> Infinite loop in log replay with Replicated LevelDB
> ---------------------------------------------------
>
> Key: AMQ-5618
> URL: https://issues.apache.org/jira/browse/AMQ-5618
> Project: ActiveMQ
> Issue Type: Bug
> Affects Versions: 5.11.0, 5.11.1
> Environment: Linux
> Reporter: Artem Karpenko
> Priority: Critical
>
> This is very similar to AMQ-5300 except that I use replicatedLevelDB
> persistence adapter and in order to reproduce I don't have to delete any
> index files.
> Setup: 1 ZK instance, 3 AMQ nodes.
> One of the AMQ configs:
> {code}
> <replicatedLevelDB directory="${activemq.data}/replicatedLevelDB"
> replicas="3"
> bind="tcp://0.0.0.0:61619"
> zkAddress="instance-6:2181"
> zkPath="/activemq/leveldb-stores"
> hostname="instance-7" />
> {code}
> Difference between nodes is only in hostname attribute.
> The way to reproduce is almost the same as in AMQ-5300:
> # Produce lots of messages to generate several log files in leveldb data
> directory.
> # Consume _some_ messages until you see "Deleting log" in activemq.log.
> # Restart master. Wait for system to rebalance itself. Everything's fine at
> this point.
> # Restart the second master.
> # Observe the massive (infinite?) logging on slave and relatively calm but
> still possibly infinite logging on master.
> This is what the first master logs after it's restarted:
> {code}
> 2015-02-25 21:37:08,338 | DEBUG | Download session connected... |
> org.apache.activemq.leveldb.replicated.SlaveLevelDBStore |
> hawtdispatch-DEFAULT-1
> 2015-02-25 21:37:08,582 | INFO | Slave skipping download of:
> log/00000000190be289.log |
> org.apache.activemq.leveldb.replicated.SlaveLevelDBStore |
> hawtdispatch-DEFAULT-1
> 2015-02-25 21:37:09,099 | INFO | Slave skipping download of:
> log/000000000642f848.log |
> org.apache.activemq.leveldb.replicated.SlaveLevelDBStore |
> hawtdispatch-DEFAULT-1
> 2015-02-25 21:37:09,411 | INFO | Slave skipping download of:
> log/000000000c85f06d.log |
> org.apache.activemq.leveldb.replicated.SlaveLevelDBStore |
> hawtdispatch-DEFAULT-1
> 2015-02-25 21:37:09,838 | INFO | Slave skipping download of:
> log/0000000012c8e921.log |
> org.apache.activemq.leveldb.replicated.SlaveLevelDBStore |
> hawtdispatch-DEFAULT-1
> 2015-02-25 21:37:09,842 | INFO | Slave requested:
> 000000001c9373b4.index/CURRENT |
> org.apache.activemq.leveldb.replicated.SlaveLevelDBStore |
> hawtdispatch-DEFAULT-1
> 2015-02-25 21:37:09,846 | INFO | Slave requested:
> 000000001c9373b4.index/MANIFEST-000002 |
> org.apache.activemq.leveldb.replicated.SlaveLevelDBStore |
> hawtdispatch-DEFAULT-1
> 2015-02-25 21:37:09,850 | INFO | Slave requested:
> 000000001c9373b4.index/000003.log |
> org.apache.activemq.leveldb.replicated.SlaveLevelDBStore |
> hawtdispatch-DEFAULT-1
> 2015-02-25 21:37:09,857 | INFO | Attaching... Downloaded 0.02/95.65 kb and
> 1/3 files | org.apache.activemq.leveldb.replicated.SlaveLevelDBStore |
> hawtdispatch-DEFAULT-1
> 2015-02-25 21:37:09,859 | INFO | Attaching... Downloaded 0.06/95.65 kb and
> 2/3 files | org.apache.activemq.leveldb.replicated.SlaveLevelDBStore |
> hawtdispatch-DEFAULT-1
> 2015-02-25 21:37:09,861 | INFO | Attaching... Downloaded 95.65/95.65 kb and
> 3/3 files | org.apache.activemq.leveldb.replicated.SlaveLevelDBStore |
> hawtdispatch-DEFAULT-1
> 2015-02-25 21:37:09,862 | INFO | Attached |
> org.apache.activemq.leveldb.replicated.SlaveLevelDBStore |
> hawtdispatch-DEFAULT-1
> 2015-02-25 21:37:09,878 | DEBUG | Taking a snapshot of the current index:
> /usr/local/apache-activemq-5.11.1/data/replicatedLevelDB/000000001c9373b4.index
> | org.apache.activemq.leveldb.LevelDBClient | Thread-2
> 2015-02-25 21:37:10,352 | DEBUG | Recovering from last index snapshot at:
> /usr/local/apache-activemq-5.11.1/data/replicatedLevelDB/dirty.index |
> org.apache.activemq.leveldb.LevelDBClient | Thread-2
> {code}
> Right after that everything seems fine. But as soon as I stop the new master,
> the another new master (that would be the third one) logs
> {code}
> 2015-02-25 21:38:43,876 | INFO | Promoted to master |
> org.apache.activemq.leveldb.replicated.MasterElector | main-EventThread
> 2015-02-25 21:38:43,894 | INFO | Using the pure java LevelDB implementation.
> | org.apache.activemq.leveldb.LevelDBClient | ActiveMQ
> BrokerService[localhost] Task-5
> 2015-02-25 21:38:45,954 | WARN | Invalid log position: 44 |
> org.apache.activemq.leveldb.LevelDBClient | ActiveMQ BrokerService[localhost]
> Task-5
> 2015-02-25 21:38:45,955 | WARN | Invalid log position: 325280 |
> org.apache.activemq.leveldb.LevelDBClient | ActiveMQ BrokerService[localhost]
> Task-5
> ...
> 2015-02-25 21:38:46,696 | WARN | Invalid log position: 104726993 |
> org.apache.activemq.leveldb.LevelDBClient | ActiveMQ BrokerService[localhost]
> Task-5
> 2015-02-25 21:38:46,902 | INFO | Master started: tcp://instance-8:61619 |
> org.apache.activemq.leveldb.replicated.MasterElector | ActiveMQ
> BrokerService[localhost] Task-6
> ...
> 2015-02-25 21:38:52,127 | INFO | Initializing Spring FrameworkServlet
> 'dispatcher' | /admin | main
> 2015-02-25 21:38:53,181 | INFO | jolokia-agent: No access restrictor found
> at classpath:/jolokia-access.xml, access to all MBeans is allowed | /api |
> main
> 2015-02-25 21:38:56,881 | WARN | Invalid log position: 0 |
> org.apache.activemq.leveldb.LevelDBClient | Thread-4
> 2015-02-25 21:39:06,884 | WARN | Invalid log position: 0 |
> org.apache.activemq.leveldb.LevelDBClient | Thread-4
> 2015-02-25 21:39:16,887 | WARN | Invalid log position: 0 |
> org.apache.activemq.leveldb.LevelDBClient | Thread-4
> ...
> {code}
> the last message starts repeating every 10 seconds without hint of stopping.
> At the same time the one left slave (that was the 1st master) logs
> {code}
> 2015-02-25 21:38:50,124 | INFO | Attached |
> org.apache.activemq.leveldb.replicated.SlaveLevelDBStore |
> hawtdispatch-DEFAULT-1
> 2015-02-25 21:38:50,134 | DEBUG | Taking a snapshot of the current index:
> /usr/local/apache-activemq-5.11.1/data/replicatedLevelDB/000000001c9373b4.index
> | org.apache.activemq.leveldb.LevelDBClient | Thread-3
> 2015-02-25 21:38:50,149 | DEBUG | Recovering from last index snapshot at:
> /usr/local/apache-activemq-5.11.1/data/replicatedLevelDB/dirty.index |
> org.apache.activemq.leveldb.LevelDBClient | Thread-3
> 2015-02-25 21:38:50,189 | DEBUG | Replay of journal from: 0 to 479425460. |
> org.apache.activemq.leveldb.LevelDBClient | Thread-3
> 2015-02-25 21:38:50,328 | WARN | No reader available for position: 0,
> log_infos:
> {105052232=LogInfo(/usr/local/apache-activemq-5.11.1/data/replicatedLevelDB/000000000642f848.log,105052232,105052197),
>
> 210104429=LogInfo(/usr/local/apache-activemq-5.11.1/data/replicatedLevelDB/000000000c85f06d.log,210104429,105052340),
>
> 315156769=LogInfo(/usr/local/apache-activemq-5.11.1/data/replicatedLevelDB/0000000012c8e921.log,315156769,105052520),
>
> 420209289=LogInfo(/usr/local/apache-activemq-5.11.1/data/replicatedLevelDB/00000000190be289.log,420209289,0)}
> | org.apache.activemq.leveldb.RecordLog | Thread-3
> 2015-02-25 21:38:50,332 | WARN | No reader available for position: 0,
> log_infos:
> {105052232=LogInfo(/usr/local/apache-activemq-5.11.1/data/replicatedLevelDB/000000000642f848.log,105052232,105052197),
>
> 210104429=LogInfo(/usr/local/apache-activemq-5.11.1/data/replicatedLevelDB/000000000c85f06d.log,210104429,105052340),
>
> 315156769=LogInfo(/usr/local/apache-activemq-5.11.1/data/replicatedLevelDB/0000000012c8e921.log,315156769,105052520),
>
> 420209289=LogInfo(/usr/local/apache-activemq-5.11.1/data/replicatedLevelDB/00000000190be289.log,420209289,0)}
> | org.apache.activemq.leveldb.RecordLog | Thread-3
> ...
> {code}
> the last message repeats infinitely and every ~1ms, with activemq process
> taking 100% CPU.
> If I would now start the stopped node (that was the 2d master) it would log
> exactly the same message with the same intensity.
> It should also be noted that while I can observe correct diminished
> (relatively to initial, due to some consumption) count of messages in a queue
> via console after the first restart, the second restart changes that and
> queue size becomes bigger (although I'm not sure if it is equal to the size
> of queue before any consumption).
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