Kafka-Streams Zustand dir io Fehler

Question

Unterer Fehler wird nach Stromlauf für bestimmte Zeit gegeben? Ich kann nicht herausfinden, wer für die Erstellung der .sst-Datei verantwortlich ist.

Env:

Kafka version 0.10.0-cp1

scala 2.11.8

org.apache.kafka.streams.errors.ProcessorStateException: Error while executing flush from store agg 
     at org.apache.kafka.streams.state.internals.RocksDBStore.flushInternal(RocksDBStore.java:424) 
     at org.apache.kafka.streams.state.internals.RocksDBStore.flush(RocksDBStore.java:414) 
     at org.apache.kafka.streams.state.internals.MeteredKeyValueStore.flush(MeteredKeyValueStore.java:165) 
     at org.apache.kafka.streams.processor.internals.ProcessorStateManager.flush(ProcessorStateManager.java:330) 
     at org.apache.kafka.streams.processor.internals.StreamTask.commit(StreamTask.java:247) 
     at org.apache.kafka.streams.processor.internals.StreamThread.commitOne(StreamThread.java:446) 
     at org.apache.kafka.streams.processor.internals.StreamThread.commitAll(StreamThread.java:434) 
     at org.apache.kafka.streams.processor.internals.StreamThread.maybeCommit(StreamThread.java:422) 
     at org.apache.kafka.streams.processor.internals.StreamThread.runLoop(StreamThread.java:340) 
     at org.apache.kafka.streams.processor.internals.StreamThread.run(StreamThread.java:218) 
Caused by: org.rocksdb.RocksDBException: IO error: /tmp/kafka-streams/pos/0_0/rocksdb/agg/000008.sst: No such file or directory 
     at org.rocksdb.RocksDB.flush(Native Method) 
     at org.rocksdb.RocksDB.flush(RocksDB.java:1329) 
     at org.apache.kafka.streams.state.internals.RocksDBStore.flushInternal(RocksDBStore.java:422) 
     ... 9 more 
[2016-06-24 11:13:54,910] ERROR Failed to commit StreamTask #0_0 in thread [StreamThread-1]: (org.apache.kafka.streams.processor.internals.StreamThread:452) 
org.apache.kafka.streams.errors.ProcessorStateException: Error while batch writing to store agg 
     at org.apache.kafka.streams.state.internals.RocksDBStore.putAllInternal(RocksDBStore.java:324) 
     at org.apache.kafka.streams.state.internals.RocksDBStore.flushCache(RocksDBStore.java:379) 
     at org.apache.kafka.streams.state.internals.RocksDBStore.flush(RocksDBStore.java:411) 
     at org.apache.kafka.streams.state.internals.MeteredKeyValueStore.flush(MeteredKeyValueStore.java:165) 
     at org.apache.kafka.streams.processor.internals.ProcessorStateManager.flush(ProcessorStateManager.java:330) 
     at org.apache.kafka.streams.processor.internals.StreamTask.commit(StreamTask.java:247) 
     at org.apache.kafka.streams.processor.internals.StreamThread.commitOne(StreamThread.java:446) 
     at org.apache.kafka.streams.processor.internals.StreamThread.commitAll(StreamThread.java:434) 
     at org.apache.kafka.streams.processor.internals.StreamThread.shutdown(StreamThread.java:248) 
     at org.apache.kafka.streams.processor.internals.StreamThread.run(StreamThread.java:228) 
Caused by: org.rocksdb.RocksDBException: IO error: /tmp/kafka-streams/pos/0_0/rocksdb/agg/000008.sst: No such file or directory 
     at org.rocksdb.RocksDB.write0(Native Method) 
     at org.rocksdb.RocksDB.write(RocksDB.java:546) 
     at org.apache.kafka.streams.state.internals.RocksDBStore.putAllInternal(RocksDBStore.java:322) 
     ... 9 more 

Answer 1

RocksDB wird intern von Kafka Streams verwendet Operator Zustand zu handhaben - und RocksDB einige Dateien auf die Festplatte schreiben.

Ist es möglich, dass jemand Sachen in /tmp Ordner gelöscht hat, und damit den Status Ihrer Kafka Streams-Anwendung löschen? Wenn ja, so konfigurieren, einen anderen Zustand Speicherort mit dem Parameter state.dir (siehe http://docs.confluent.io/current/streams/developer-guide.html#optional-configuration-parameters)