Ran into these two internal exceptions today. Likely they are known or my fault but I'm reporting them anyway:
Exception in thread "StreamThread-1" java.lang.NullPointerException at org.apache.kafka.streams.processor.internals.StreamThread.runLoop(StreamThread.java:304) at org.apache.kafka.streams.processor.internals.StreamThread.run(StreamThread.java:218) and this one: Exception in thread "StreamThread-1" org.apache.kafka.streams.errors.StreamsException: stream-thread [StreamThread-1] Failed to rebalance at org.apache.kafka.streams.processor.internals.StreamThread.runLoop(StreamThread.java:410) at org.apache.kafka.streams.processor.internals.StreamThread.run(StreamThread.java:242) Caused by: org.apache.kafka.streams.errors.ProcessorStateException: Error opening store table_stream-201611290000 at location /tmp/kafka-streams/BreakoutProcessor/0_0/table_stream/table_stream-201611290000 at org.apache.kafka.streams.state.internals.RocksDBStore.openDB(RocksDBStore.java:196) at org.apache.kafka.streams.state.internals.RocksDBStore.openDB(RocksDBStore.java:158) at org.apache.kafka.streams.state.internals.RocksDBWindowStore$Segment.openDB(RocksDBWindowStore.java:72) at org.apache.kafka.streams.state.internals.RocksDBWindowStore.getOrCreateSegment(RocksDBWindowStore.java:402) at org.apache.kafka.streams.state.internals.RocksDBWindowStore.putInternal(RocksDBWindowStore.java:333) at org.apache.kafka.streams.state.internals.RocksDBWindowStore.access$100(RocksDBWindowStore.java:51) at org.apache.kafka.streams.state.internals.RocksDBWindowStore$2.restore(RocksDBWindowStore.java:212) at org.apache.kafka.streams.processor.internals.ProcessorStateManager.restoreActiveState(ProcessorStateManager.java:235) at org.apache.kafka.streams.processor.internals.ProcessorStateManager.register(ProcessorStateManager.java:198) at org.apache.kafka.streams.processor.internals.ProcessorContextImpl.register(ProcessorContextImpl.java:123) at org.apache.kafka.streams.state.internals.RocksDBWindowStore.init(RocksDBWindowStore.java:206) at org.apache.kafka.streams.state.internals.MeteredWindowStore.init(MeteredWindowStore.java:66) at org.apache.kafka.streams.state.internals.CachingWindowStore.init(CachingWindowStore.java:64) at org.apache.kafka.streams.processor.internals.AbstractTask.initializeStateStores(AbstractTask.java:81) at org.apache.kafka.streams.processor.internals.StreamTask.<init>(StreamTask.java:120) 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) ... 1 more Caused by: org.rocksdb.RocksDBException: IO error: lock /tmp/kafka-streams/BreakoutProcessor/0_0/table_stream/table_stream-201611290000/LOCK: No locks available at org.rocksdb.RocksDB.open(Native Method) at org.rocksdb.RocksDB.open(RocksDB.java:184) at org.apache.kafka.streams.state.internals.RocksDBStore.openDB(RocksDBStore.java:189) ... 26 more
