Guillaume created AMQ-4837:
------------------------------
Summary: LevelDB corrupted in AMQ cluster
Key: AMQ-4837
URL: https://issues.apache.org/jira/browse/AMQ-4837
Project: ActiveMQ
Issue Type: Bug
Components: activemq-leveldb-store
Affects Versions: 5.9.0
Environment: CentOS, Linux version 2.6.32-71.29.1.el6.x86_64
java-1.7.0-openjdk.x86_64/java-1.6.0-openjdk.x86_64
zookeeper-3.4.5.2
Reporter: Guillaume
Priority: Critical
I have clustered 3 ActiveMQ instances using replicated leveldb and zookeeper.
When performing some tests using Web UI, I can across issues that appears to
corrupt the leveldb data files.
The issue can be replicated by performing the following steps:
1. Start 3 activemq nodes.
2. Push a message to the master (Node1) and browse the queue using the web
UI
3. Stop master node (Node1)
4. Push a message to the new master (Node2) and browse the queue using the
web UI. Message summary and queue content ok.
5. Start Node1
6. Stop master node (Node2)
7. Browse the queue using the web UI on new master (Node3). Message
summary ok however when clicking on the queue, no message details. An error
(see below) is logged by the master, which attempts a restart.
>From this point, the database appears to be corrupted and the same error
>occurs to each node infinitely (shutdown/restart). The only way around is to
>stop the nodes and clear the data files.
However when a message is pushed between step 5 and 6, the error doesn’t occur.
=================================
Leveldb configuration on the 3 instances:
<persistenceAdapter>
<replicatedLevelDB
directory="${activemq.data}/leveldb"
replicas="3"
bind="tcp://0.0.0.0:0"
zkAddress="zkserver:2181"
zkPath="/activemq/leveldb-stores"
/>
</persistenceAdapter>
=================================
The error is:
INFO | Stopping BrokerService[localhost] due to exception, java.io.IOException
java.io.IOException
at
org.apache.activemq.util.IOExceptionSupport.create(IOExceptionSupport.java:39)
at
org.apache.activemq.leveldb.LevelDBClient.might_fail(LevelDBClient.scala:543)
at
org.apache.activemq.leveldb.LevelDBClient.might_fail_using_index(LevelDBClient.scala:974)
at
org.apache.activemq.leveldb.LevelDBClient.collectionCursor(LevelDBClient.scala:1270)
at
org.apache.activemq.leveldb.LevelDBClient.queueCursor(LevelDBClient.scala:1194)
at
org.apache.activemq.leveldb.DBManager.cursorMessages(DBManager.scala:708)
at
org.apache.activemq.leveldb.LevelDBStore$LevelDBMessageStore.recoverNextMessages(LevelDBStore.scala:741)
at
org.apache.activemq.broker.region.cursors.QueueStorePrefetch.doFillBatch(QueueStorePrefetch.java:106)
at
org.apache.activemq.broker.region.cursors.AbstractStoreCursor.fillBatch(AbstractStoreCursor.java:258)
at
org.apache.activemq.broker.region.cursors.AbstractStoreCursor.reset(AbstractStoreCursor.java:108)
at
org.apache.activemq.broker.region.cursors.StoreQueueCursor.reset(StoreQueueCursor.java:157)
at
org.apache.activemq.broker.region.Queue.doPageInForDispatch(Queue.java:1875)
at
org.apache.activemq.broker.region.Queue.pageInMessages(Queue.java:2086)
at org.apache.activemq.broker.region.Queue.iterate(Queue.java:1581)
at
org.apache.activemq.thread.PooledTaskRunner.runTask(PooledTaskRunner.java:129)
at
org.apache.activemq.thread.PooledTaskRunner$1.run(PooledTaskRunner.java:47)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:722)
Caused by: java.lang.NullPointerException
at
org.apache.activemq.leveldb.LevelDBClient$$anonfun$queueCursor$1.apply(LevelDBClient.scala:1198)
at
org.apache.activemq.leveldb.LevelDBClient$$anonfun$queueCursor$1.apply(LevelDBClient.scala:1194)
at
org.apache.activemq.leveldb.LevelDBClient$$anonfun$collectionCursor$1$$anonfun$apply$mcV$sp$12.apply(LevelDBClient.scala:1272)
at
org.apache.activemq.leveldb.LevelDBClient$$anonfun$collectionCursor$1$$anonfun$apply$mcV$sp$12.apply(LevelDBClient.scala:1271)
at
org.apache.activemq.leveldb.LevelDBClient$RichDB.check$4(LevelDBClient.scala:315)
at
org.apache.activemq.leveldb.LevelDBClient$RichDB.cursorRange(LevelDBClient.scala:317)
at
org.apache.activemq.leveldb.LevelDBClient$$anonfun$collectionCursor$1.apply$mcV$sp(LevelDBClient.scala:1271)
at
org.apache.activemq.leveldb.LevelDBClient$$anonfun$collectionCursor$1.apply(LevelDBClient.scala:1271)
at
org.apache.activemq.leveldb.LevelDBClient$$anonfun$collectionCursor$1.apply(LevelDBClient.scala:1271)
at
org.apache.activemq.leveldb.LevelDBClient.usingIndex(LevelDBClient.scala:968)
at
org.apache.activemq.leveldb.LevelDBClient$$anonfun$might_fail_using_index$1.apply(LevelDBClient.scala:974)
at
org.apache.activemq.leveldb.LevelDBClient.might_fail(LevelDBClient.scala:540)
... 17 more
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