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https://issues.apache.org/jira/browse/KAFKA-5070?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16035452#comment-16035452
]
Kevin Chen commented on KAFKA-5070:
-----------------------------------
we saw the similar exceptions in our stream applications too, we are using 10.2
client/server. We have 6 threads per instance. we have 12 partitions on the
incoming topic. so total 12 tasks, we are running total 2 instances on 2
nodes(one instance each).
We got the following exceptions in different situations
! org.apache.kafka.streams.errors.LockException: task [0_1] Failed to lock
the state directory:
at one time, the root cause is rocskdb.flush() exception(we are not using
custom implementation), restart fix the problem. only saw that once.
But most time it happens when to re-balance, like we need bring down a node. In
this case, no apparent root cause, here is all I got from the stack trace
WARN [2017-06-02 21:23:47,591]
org.apache.kafka.streams.processor.internals.StreamThread: Could not create
task 0_6. Will retry.
! org.apache.kafka.streams.errors.LockException: task [0_6] Failed to lock the
state directory: /tmp/aggregator-one/kafka-streams-state/aggregator-one-1/0_6
! at
org.apache.kafka.streams.processor.internals.ProcessorStateManager.<init>(ProcessorStateManager.java:102)
! at
org.apache.kafka.streams.processor.internals.AbstractTask.<init>(AbstractTask.java:73)
! at
org.apache.kafka.streams.processor.internals.StreamTask.<init>(StreamTask.java:108)
! at
org.apache.kafka.streams.processor.internals.StreamThread.createStreamTask(StreamThread.java:834)
! at
org.apache.kafka.streams.processor.internals.StreamThread$TaskCreator.createTask(StreamThread.java:1207)
! at
org.apache.kafka.streams.processor.internals.StreamThread$AbstractTaskCreator.retryWithBackoff(StreamThread.java:1180)
! at
org.apache.kafka.streams.processor.internals.StreamThread.addStreamTasks(StreamThread.java:937)
! at
org.apache.kafka.streams.processor.internals.StreamThread.access$500(StreamThread.java:69)
! at
org.apache.kafka.streams.processor.internals.StreamThread$1.onPartitionsAssigned(StreamThread.java:236)
! at
org.apache.kafka.clients.consumer.internals.ConsumerCoordinator.onJoinComplete(ConsumerCoordinator.java:255)
! at
org.apache.kafka.clients.consumer.internals.AbstractCoordinator.joinGroupIfNeeded(AbstractCoordinator.java:339)
! at
org.apache.kafka.clients.consumer.internals.AbstractCoordinator.ensureActiveGroup(AbstractCoordinator.java:303)
! at
org.apache.kafka.clients.consumer.internals.ConsumerCoordinator.poll(ConsumerCoordinator.java:286)
! at
org.apache.kafka.clients.consumer.KafkaConsumer.pollOnce(KafkaConsumer.java:1030)
! at
org.apache.kafka.clients.consumer.KafkaConsumer.poll(KafkaConsumer.java:995)
! at
org.apache.kafka.streams.processor.internals.StreamThread.runLoop(StreamThread.java:582)
! at
org.apache.kafka.streams.processor.internals.StreamThread.run(StreamThread.java:368)
> org.apache.kafka.streams.errors.LockException: task [0_18] Failed to lock the
> state directory: /opt/rocksdb/pulse10/0_18
> ------------------------------------------------------------------------------------------------------------------------
>
> Key: KAFKA-5070
> URL: https://issues.apache.org/jira/browse/KAFKA-5070
> Project: Kafka
> Issue Type: Bug
> Components: streams
> Affects Versions: 0.10.2.0
> Environment: Linux Version
> Reporter: Dhana
> Assignee: Matthias J. Sax
> Attachments: RocksDB_LockStateDirec.7z
>
>
> Notes: we run two instance of consumer in two difference machines/nodes.
> we have 400 partitions. 200 stream threads/consumer, with 2 consumer.
> We perform HA test(on rebalance - shutdown of one of the consumer/broker), we
> see this happening
> Error:
> 2017-04-05 11:36:09.352 WARN StreamThread:1184 StreamThread-66 - Could not
> create task 0_115. Will retry.
> org.apache.kafka.streams.errors.LockException: task [0_115] Failed to lock
> the state directory: /opt/rocksdb/pulse10/0_115
> at
> org.apache.kafka.streams.processor.internals.ProcessorStateManager.<init>(ProcessorStateManager.java:102)
> at
> org.apache.kafka.streams.processor.internals.AbstractTask.<init>(AbstractTask.java:73)
> at
> org.apache.kafka.streams.processor.internals.StreamTask.<init>(StreamTask.java:108)
> at
> org.apache.kafka.streams.processor.internals.StreamThread.createStreamTask(StreamThread.java:834)
> at
> org.apache.kafka.streams.processor.internals.StreamThread$TaskCreator.createTask(StreamThread.java:1207)
> at
> org.apache.kafka.streams.processor.internals.StreamThread$AbstractTaskCreator.retryWithBackoff(StreamThread.java:1180)
> at
> org.apache.kafka.streams.processor.internals.StreamThread.addStreamTasks(StreamThread.java:937)
> at
> org.apache.kafka.streams.processor.internals.StreamThread.access$500(StreamThread.java:69)
> at
> org.apache.kafka.streams.processor.internals.StreamThread$1.onPartitionsAssigned(StreamThread.java:236)
> at
> org.apache.kafka.clients.consumer.internals.ConsumerCoordinator.onJoinComplete(ConsumerCoordinator.java:255)
> at
> org.apache.kafka.clients.consumer.internals.AbstractCoordinator.joinGroupIfNeeded(AbstractCoordinator.java:339)
> at
> org.apache.kafka.clients.consumer.internals.AbstractCoordinator.ensureActiveGroup(AbstractCoordinator.java:303)
> at
> org.apache.kafka.clients.consumer.internals.ConsumerCoordinator.poll(ConsumerCoordinator.java:286)
> at
> org.apache.kafka.clients.consumer.KafkaConsumer.pollOnce(KafkaConsumer.java:1030)
> at
> org.apache.kafka.clients.consumer.KafkaConsumer.poll(KafkaConsumer.java:995)
> at
> org.apache.kafka.streams.processor.internals.StreamThread.runLoop(StreamThread.java:582)
> at
> org.apache.kafka.streams.processor.internals.StreamThread.run(StreamThread.java:368)
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