This came up a few times today: 2016-12-10 18:45:52,637 [StreamThread-1] ERROR o.a.k.s.p.internals.StreamThread - stream-thread [StreamThread-1] Failed to create an active task %s:
org.apache.kafka.streams.errors.ProcessorStateException: task [0_0] Error while creating the state manager at org.apache.kafka.streams.processor.internals.AbstractTask.<init>(AbstractTask.java:72) at org.apache.kafka.streams.processor.internals.StreamTask.<init>(StreamTask.java:90) at org.apache.kafka.streams.processor.internals.StreamThread.createStreamTask(StreamThread.java:633) at org.apache.kafka.streams.processor.internals.StreamThread.addStreamTasks(StreamThread.java:660) at org.apache.kafka.streams.processor.internals.StreamThread.access$100(StreamThread.java:69) at org.apache.kafka.streams.processor.internals.StreamThread$1.onPartitionsAssigned(StreamThread.java:124) at org.apache.kafka.clients.consumer.internals.ConsumerCoordinator.onJoinComplete(ConsumerCoordinator.java:228) at org.apache.kafka.clients.consumer.internals.AbstractCoordinator.joinGroupIfNeeded(AbstractCoordinator.java:313) at org.apache.kafka.clients.consumer.internals.AbstractCoordinator.ensureActiveGroup(AbstractCoordinator.java:277) at org.apache.kafka.clients.consumer.internals.ConsumerCoordinator.poll(ConsumerCoordinator.java:259) at org.apache.kafka.clients.consumer.KafkaConsumer.pollOnce(KafkaConsumer.java:1013) at org.apache.kafka.clients.consumer.KafkaConsumer.poll(KafkaConsumer.java:979) at org.apache.kafka.streams.processor.internals.StreamThread.runLoop(StreamThread.java:407) at org.apache.kafka.streams.processor.internals.StreamThread.run(StreamThread.java:242) Caused by: java.io.IOException: task [0_0] Failed to lock the state directory: /mnt/extra/space/MinuteAgg/0_0 at org.apache.kafka.streams.processor.internals.ProcessorStateManager.<init>(ProcessorStateManager.java:101) at org.apache.kafka.streams.processor.internals.AbstractTask.<init>(AbstractTask.java:69) ... 13 common frames omitted