KStream job fails in multi-thread mode

We are experimenting an issue with KStream when using more than one thread. Currently, we are using 2 threads in a t2.large EC2 AWS instance. According to the searches we made, this error should be solved in the version we are currently using. It seems the job fails to rebalance due to an error on the lock on the state directory. This is the full log.

16/12/19 16:36:36 INFO internals.AbstractCoordinator: (Re-)joining group dougal_text_pipeline_id
16/12/19 16:36:36 INFO assignment.TaskAssignor: stream-thread [StreamThread-6] Assigning tasks to clients:

{a2a7324e-43da-4b17-878b-53f62a0fd870=[activeTasks: ([]) assignedTasks: ([]) prevActiveTasks: ([0_32, 0_2, 0_68, 0_38, 0_8, 0_74, 0_44, 0_14, 0_80, 0_50, 0_20, 0_86, 0_56, 0_26, 0_92, 0_62]) prevAssignedTasks: ([0_32, 0_2, 0_68, 0_38, 0_8, 0_74, 0_44, 0_14, 0_80, 0_50, 0_20, 0_86, 0_56, 0_26, 0_92, 0_62]) capacity: 1.0 cost: 0.0]}

, prevAssignmentBalanced: false, prevClientsUnchanged: false, tasks: [0_0, 0_1, 0_2, 0_3, 0_4, 0_5, 0_6, 0_7, 0_8, 0_9, 0_10, 0_11, 0_12, 0_13, 0_14, 0_15, 0_16, 0_17, 0_18, 0_19, 0_20, 0_21, 0_22, 0_23, 0_24, 0_25, 0_26, 0_27, 0_28, 0_29, 0_30, 0_31, 0_32, 0_33, 0_34, 0_35, 0_36, 0_37, 0_38, 0_39, 0_40, 0_41, 0_42, 0_43, 0_44, 0_45, 0_46, 0_47, 0_48, 0_49, 0_50, 0_51, 0_52, 0_53, 0_54, 0_55, 0_56, 0_57, 0_58, 0_59, 0_60, 0_61, 0_62, 0_63, 0_64, 0_65, 0_66, 0_67, 0_68, 0_69, 0_70, 0_71, 0_72, 0_73, 0_74, 0_75, 0_76, 0_77, 0_78, 0_79, 0_80, 0_81, 0_82, 0_83, 0_84, 0_85, 0_86, 0_87, 0_88, 0_89, 0_90, 0_91, 0_92, 0_93, 0_94, 0_95], replicas: 0
16/12/19 16:36:36 INFO assignment.TaskAssignor: stream-thread [StreamThread-6] Assigned with:

{a2a7324e-43da-4b17-878b-53f62a0fd870=[activeTasks: ([0_0, 0_1, 0_2, 0_3, 0_4, 0_5, 0_6, 0_7, 0_8, 0_9, 0_10, 0_11, 0_12, 0_13, 0_14, 0_15, 0_16, 0_17, 0_18, 0_19, 0_20, 0_21, 0_22, 0_23, 0_24, 0_25, 0_26, 0_27, 0_28, 0_29, 0_30, 0_31, 0_32, 0_33, 0_34, 0_35, 0_36, 0_37, 0_38, 0_39, 0_40, 0_41, 0_42, 0_43, 0_44, 0_45, 0_46, 0_47, 0_48, 0_49, 0_50, 0_51, 0_52, 0_53, 0_54, 0_55, 0_56, 0_57, 0_58, 0_59, 0_60, 0_61, 0_62, 0_63, 0_64, 0_65, 0_66, 0_67, 0_68, 0_69, 0_70, 0_71, 0_72, 0_73, 0_74, 0_75, 0_76, 0_77, 0_78, 0_79, 0_80, 0_81, 0_82, 0_83, 0_84, 0_85, 0_86, 0_87, 0_88, 0_89, 0_90, 0_91, 0_92, 0_93, 0_94, 0_95]) assignedTasks: ([0_0, 0_1, 0_2, 0_3, 0_4, 0_5, 0_6, 0_7, 0_8, 0_9, 0_10, 0_11, 0_12, 0_13, 0_14, 0_15, 0_16, 0_17, 0_18, 0_19, 0_20, 0_21, 0_22, 0_23, 0_24, 0_25, 0_26, 0_27, 0_28, 0_29, 0_30, 0_31, 0_32, 0_33, 0_34, 0_35, 0_36, 0_37, 0_38, 0_39, 0_40, 0_41, 0_42, 0_43, 0_44, 0_45, 0_46, 0_47, 0_48, 0_49, 0_50, 0_51, 0_52, 0_53, 0_54, 0_55, 0_56, 0_57, 0_58, 0_59, 0_60, 0_61, 0_62, 0_63, 0_64, 0_65, 0_66, 0_67, 0_68, 0_69, 0_70, 0_71, 0_72, 0_73, 0_74, 0_75, 0_76, 0_77, 0_78, 0_79, 0_80, 0_81, 0_82, 0_83, 0_84, 0_85, 0_86, 0_87, 0_88, 0_89, 0_90, 0_91, 0_92, 0_93, 0_94, 0_95]) prevActiveTasks: ([]) prevAssignedTasks: ([]) capacity: 1.0 cost: 41.600000000000016]}

16/12/19 16:36:36 INFO internals.AbstractCoordinator: Successfully joined group dougal_text_pipeline_id with generation 21
16/12/19 16:36:36 INFO internals.ConsumerCoordinator: Setting newly assigned partitions [crawler-fashion-content-83, crawler-fashion-content-17, crawler-fashion-content-50, crawler-fashion-content-91, crawler-fashion-content-25, crawler-fashion-content-58, crawler-fashion-content-33, crawler-fashion-content-66, crawler-fashion-content-0, crawler-fashion-content-41, crawler-fashion-content-74, crawler-fashion-content-8, crawler-fashion-content-49, crawler-fashion-content-82, crawler-fashion-content-16, crawler-fashion-content-57, crawler-fashion-content-90, crawler-fashion-content-24, crawler-fashion-content-65, crawler-fashion-content-32, crawler-fashion-content-73, crawler-fashion-content-7, crawler-fashion-content-40, crawler-fashion-content-81, crawler-fashion-content-15, crawler-fashion-content-48, crawler-fashion-content-89, crawler-fashion-content-23, crawler-fashion-content-56, crawler-fashion-content-31, crawler-fashion-content-64, crawler-fashion-content-39, crawler-fashion-content-72, crawler-fashion-content-6, crawler-fashion-content-47, crawler-fashion-content-80, crawler-fashion-content-14, crawler-fashion-content-55, crawler-fashion-content-88, crawler-fashion-content-22, crawler-fashion-content-63, crawler-fashion-content-30, crawler-fashion-content-71, crawler-fashion-content-5, crawler-fashion-content-38, crawler-fashion-content-79, crawler-fashion-content-13, crawler-fashion-content-46, crawler-fashion-content-87, crawler-fashion-content-21, crawler-fashion-content-54, crawler-fashion-content-4, crawler-fashion-content-95, crawler-fashion-content-29, crawler-fashion-content-62, crawler-fashion-content-12, crawler-fashion-content-37, crawler-fashion-content-70, crawler-fashion-content-20, crawler-fashion-content-45, crawler-fashion-content-78, crawler-fashion-content-28, crawler-fashion-content-53, crawler-fashion-content-86, crawler-fashion-content-3, crawler-fashion-content-36, crawler-fashion-content-61, crawler-fashion-content-94, crawler-fashion-content-11, crawler-fashion-content-44, crawler-fashion-content-69, crawler-fashion-content-19, crawler-fashion-content-52, crawler-fashion-content-77, crawler-fashion-content-27, crawler-fashion-content-60, crawler-fashion-content-85, crawler-fashion-content-35, crawler-fashion-content-68, crawler-fashion-content-2, crawler-fashion-content-93, crawler-fashion-content-43, crawler-fashion-content-76, crawler-fashion-content-10, crawler-fashion-content-51, crawler-fashion-content-84, crawler-fashion-content-18, crawler-fashion-content-59, crawler-fashion-content-92, crawler-fashion-content-26, crawler-fashion-content-67, crawler-fashion-content-1, crawler-fashion-content-34, crawler-fashion-content-75, crawler-fashion-content-9, crawler-fashion-content-42] for group dougal_text_pipeline_id
16/12/19 16:36:36 INFO internals.StreamThread: stream-thread [StreamThread-6] New partitions [[crawler-fashion-content-83, crawler-fashion-content-17, crawler-fashion-content-50, crawler-fashion-content-91, crawler-fashion-content-25, crawler-fashion-content-58, crawler-fashion-content-33, crawler-fashion-content-66, crawler-fashion-content-0, crawler-fashion-content-41, crawler-fashion-content-74, crawler-fashion-content-8, crawler-fashion-content-49, crawler-fashion-content-82, crawler-fashion-content-16, crawler-fashion-content-57, crawler-fashion-content-90, crawler-fashion-content-24, crawler-fashion-content-65, crawler-fashion-content-32, crawler-fashion-content-73, crawler-fashion-content-7, crawler-fashion-content-40, crawler-fashion-content-81, crawler-fashion-content-15, crawler-fashion-content-48, crawler-fashion-content-89, crawler-fashion-content-23, crawler-fashion-content-56, crawler-fashion-content-31, crawler-fashion-content-64, crawler-fashion-content-39, crawler-fashion-content-72, crawler-fashion-content-6, crawler-fashion-content-47, crawler-fashion-content-80, crawler-fashion-content-14, crawler-fashion-content-55, crawler-fashion-content-88, crawler-fashion-content-22, crawler-fashion-content-63, crawler-fashion-content-30, crawler-fashion-content-71, crawler-fashion-content-5, crawler-fashion-content-38, crawler-fashion-content-79, crawler-fashion-content-13, crawler-fashion-content-46, crawler-fashion-content-87, crawler-fashion-content-21, crawler-fashion-content-54, crawler-fashion-content-4, crawler-fashion-content-95, crawler-fashion-content-29, crawler-fashion-content-62, crawler-fashion-content-12, crawler-fashion-content-37, crawler-fashion-content-70, crawler-fashion-content-20, crawler-fashion-content-45, crawler-fashion-content-78, crawler-fashion-content-28, crawler-fashion-content-53, crawler-fashion-content-86, crawler-fashion-content-3, crawler-fashion-content-36, crawler-fashion-content-61, crawler-fashion-content-94, crawler-fashion-content-11, crawler-fashion-content-44, crawler-fashion-content-69, crawler-fashion-content-19, crawler-fashion-content-52, crawler-fashion-content-77, crawler-fashion-content-27, crawler-fashion-content-60, crawler-fashion-content-85, crawler-fashion-content-35, crawler-fashion-content-68, crawler-fashion-content-2, crawler-fashion-content-93, crawler-fashion-content-43, crawler-fashion-content-76, crawler-fashion-content-10, crawler-fashion-content-51, crawler-fashion-content-84, crawler-fashion-content-18, crawler-fashion-content-59, crawler-fashion-content-92, crawler-fashion-content-26, crawler-fashion-content-67, crawler-fashion-content-1, crawler-fashion-content-34, crawler-fashion-content-75, crawler-fashion-content-9, crawler-fashion-content-42]] assigned at the end of consumer rebalance.
16/12/19 16:36:36 INFO internals.StreamThread: stream-thread [StreamThread-6] Creating active task 0_0 with assigned partitions [[crawler-fashion-content-0]]
16/12/19 16:36:36 INFO kafka.KafkaStreamsBackboneCoordinator: get() called
16/12/19 16:36:36 INFO internals.StreamTask: task [0_0] Initializing state stores
16/12/19 16:36:36 INFO internals.StreamTask: task [0_0] Initializing processor nodes of the topology
16/12/19 16:36:36 INFO kafka.KafkaStreamsBackboneValueTransformer: Init called with org.apache.kafka.streams.processor.internals.ProcessorContextImpl@43350b2e 0_0
16/12/19 16:36:36 INFO internals.StreamThread: stream-thread [StreamThread-6] Creating active task 0_1 with assigned partitions [[crawler-fashion-content-1]]
16/12/19 16:36:36 INFO kafka.KafkaStreamsBackboneCoordinator: get() called
16/12/19 16:36:36 INFO internals.StreamTask: task [0_1] Initializing state stores
16/12/19 16:36:36 INFO internals.StreamTask: task [0_1] Initializing processor nodes of the topology
16/12/19 16:36:36 INFO kafka.KafkaStreamsBackboneValueTransformer: Init called with org.apache.kafka.streams.processor.internals.ProcessorContextImpl@5d045471 0_1
16/12/19 16:36:36 INFO internals.StreamThread: stream-thread [StreamThread-6] Creating active task 0_2 with assigned partitions [[crawler-fashion-content-2]]
16/12/19 16:36:36 INFO kafka.KafkaStreamsBackboneCoordinator: get() called
16/12/19 16:36:36 INFO internals.StreamTask: task [0_2] Initializing state stores
16/12/19 16:36:36 INFO internals.StreamTask: task [0_2] Initializing processor nodes of the topology
16/12/19 16:36:36 INFO kafka.KafkaStreamsBackboneValueTransformer: Init called with org.apache.kafka.streams.processor.internals.ProcessorContextImpl@215e155a 0_2
16/12/19 16:36:36 INFO internals.StreamThread: stream-thread [StreamThread-6] Creating active task 0_3 with assigned partitions [[crawler-fashion-content-3]]
16/12/19 16:36:36 INFO kafka.KafkaStreamsBackboneCoordinator: get() called
16/12/19 16:36:36 INFO internals.StreamTask: task [0_3] Initializing state stores
16/12/19 16:36:36 INFO internals.StreamTask: task [0_3] Initializing processor nodes of the topology
#011at org.apache.kafka.streams.processor.internals.StreamTask.<init>(StreamTask.java:90)
#011at org.apache.kafka.streams.processor.internals.StreamThread.createStreamTask(StreamThread.java:633)
#011at org.apache.kafka.streams.processor.internals.StreamThread.addStreamTasks(StreamThread.java:660)
#011at org.apache.kafka.streams.processor.internals.StreamThread.access$100(StreamThread.java:69)
#011at org.apache.kafka.streams.processor.internals.StreamThread$1.onPartitionsAssigned(StreamThread.java:124)
#011at org.apache.kafka.clients.consumer.internals.ConsumerCoordinator.onJoinComplete(ConsumerCoordinator.java:228)
#011at org.apache.kafka.clients.consumer.internals.AbstractCoordinator.joinGroupIfNeeded(AbstractCoordinator.java:313)
#011at org.apache.kafka.clients.consumer.internals.AbstractCoordinator.ensureActiveGroup(AbstractCoordinator.java:277)
#011at org.apache.kafka.clients.consumer.internals.ConsumerCoordinator.poll(ConsumerCoordinator.java:259)
#011at org.apache.kafka.clients.consumer.KafkaConsumer.pollOnce(KafkaConsumer.java:1013)
#011at org.apache.kafka.clients.consumer.KafkaConsumer.poll(KafkaConsumer.java:979)
#011at org.apache.kafka.streams.processor.internals.StreamThread.runLoop(StreamThread.java:407)
#011at org.apache.kafka.streams.processor.internals.StreamThread.run(StreamThread.java:242)
Caused by: java.io.IOException: task [0_6] Failed to lock the state directory: /tmp/kafka-streams/dougal_text_pipeline_id/0_6
#011at org.apache.kafka.streams.processor.internals.ProcessorStateManager.<init>(ProcessorStateManager.java:101)
#011at org.apache.kafka.streams.processor.internals.AbstractTask.<init>(AbstractTask.java:69)
#011... 13 more
16/12/19 16:36:37 ERROR internals.ConsumerCoordinator: User provided listener org.apache.kafka.streams.processor.internals.StreamThread$1 for group dougal_text_pipeline_id failed on partition assignment
org.apache.kafka.streams.errors.ProcessorStateException: task [0_6] Error while creating the state manager
#011at org.apache.kafka.streams.processor.internals.AbstractTask.<init>(AbstractTask.java:72)
#011at org.apache.kafka.streams.processor.internals.StreamTask.<init>(StreamTask.java:90)
#011at org.apache.kafka.streams.processor.internals.StreamThread.createStreamTask(StreamThread.java:633)
#011at org.apache.kafka.streams.processor.internals.StreamThread.addStreamTasks(StreamThread.java:660)
#011at org.apache.kafka.streams.processor.internals.StreamThread.access$100(StreamThread.java:69)
#011at org.apache.kafka.streams.processor.internals.StreamThread$1.onPartitionsAssigned(StreamThread.java:124)
#011at org.apache.kafka.clients.consumer.internals.ConsumerCoordinator.onJoinComplete(ConsumerCoordinator.java:228)
#011at org.apache.kafka.clients.consumer.internals.AbstractCoordinator.joinGroupIfNeeded(AbstractCoordinator.java:313)
#011at org.apache.kafka.clients.consumer.internals.AbstractCoordinator.ensureActiveGroup(AbstractCoordinator.java:277)
#011at org.apache.kafka.clients.consumer.internals.ConsumerCoordinator.poll(ConsumerCoordinator.java:259)
#011at org.apache.kafka.clients.consumer.KafkaConsumer.pollOnce(KafkaConsumer.java:1013)
#011at org.apache.kafka.clients.consumer.KafkaConsumer.poll(KafkaConsumer.java:979)
#011at org.apache.kafka.streams.processor.internals.StreamThread.runLoop(StreamThread.java:407)
#011at org.apache.kafka.streams.processor.internals.StreamThread.run(StreamThread.java:242)
Caused by: java.io.IOException: task [0_6] Failed to lock the state directory: /tmp/kafka-streams/dougal_text_pipeline_id/0_6
#011at org.apache.kafka.streams.processor.internals.ProcessorStateManager.<init>(ProcessorStateManager.java:101)
#011at org.apache.kafka.streams.processor.internals.AbstractTask.<init>(AbstractTask.java:69)
#011... 13 more
16/12/19 16:36:37 INFO internals.StreamThread: stream-thread [StreamThread-6] Shutting down