[jira] [Created] (SAMZA-347) Failure in SamzaContainer causes LevelDB stack trace

["Chris Riccomini (JIRA)" <ji...@apache.org>]

Chris Riccomini created SAMZA-347:
-------------------------------------

             Summary: Failure in SamzaContainer causes LevelDB stack trace
                 Key: SAMZA-347
                 URL: https://issues.apache.org/jira/browse/SAMZA-347
             Project: Samza
          Issue Type: Bug
          Components: kv
    Affects Versions: 0.7.0
            Reporter: Chris Riccomini
             Fix For: 0.8.0


If there is a failure in SamzaContainer, and state is configured with LevelDB, we see this exception:

{noformat}
Exception in thread "main" org.fusesource.leveldbjni.internal.NativeDB$DBException: IO error: /mnt/u002/samsa-yarn/usercache/samza-perf-playground/appcache/application_1399672625491_0002/container_1399672625491_0002_01_000611/state/test-store-all-calls/47/LOCK: No such file or directory
	at org.fusesource.leveldbjni.internal.NativeDB.checkStatus(NativeDB.java:200)
	at org.fusesource.leveldbjni.internal.NativeDB.open(NativeDB.java:218)
	at org.fusesource.leveldbjni.JniDBFactory.open(JniDBFactory.java:168)
	at org.apache.samza.storage.kv.LevelDbKeyValueStore.db$lzycompute(LevelDbKeyValueStore.scala:71)
	at org.apache.samza.storage.kv.LevelDbKeyValueStore.db(LevelDbKeyValueStore.scala:71)
	at org.apache.samza.storage.kv.LevelDbKeyValueStore.putAll(LevelDbKeyValueStore.scala:99)
	at org.apache.samza.storage.kv.SerializedKeyValueStore.putAll(SerializedKeyValueStore.scala:58)
	at org.apache.samza.storage.kv.CachedStore.flush(CachedStore.scala:161)
	at org.apache.samza.storage.kv.NullSafeKeyValueStore.flush(NullSafeKeyValueStore.scala:68)
	at org.apache.samza.storage.kv.KeyValueStorageEngine.flush(KeyValueStorageEngine.scala:117)
	at org.apache.samza.storage.kv.KeyValueStorageEngine.close(KeyValueStorageEngine.scala:129)
	at org.apache.samza.storage.kv.KeyValueStorageEngine.stop(KeyValueStorageEngine.scala:123)
	at org.apache.samza.storage.TaskStorageManager$$anonfun$stop$2.apply(TaskStorageManager.scala:129)
	at org.apache.samza.storage.TaskStorageManager$$anonfun$stop$2.apply(TaskStorageManager.scala:129)
	at scala.collection.Iterator$class.foreach(Iterator.scala:727)
	at scala.collection.AbstractIterator.foreach(Iterator.scala:1157)
	at scala.collection.MapLike$DefaultValuesIterable.foreach(MapLike.scala:206)
	at org.apache.samza.storage.TaskStorageManager.stop(TaskStorageManager.scala:129)
	at org.apache.samza.container.TaskInstance.shutdownStores(TaskInstance.scala:236)
	at org.apache.samza.container.SamzaContainer$$anonfun$shutdownStores$2.apply(SamzaContainer.scala:660)
	at org.apache.samza.container.SamzaContainer$$anonfun$shutdownStores$2.apply(SamzaContainer.scala:660)
	at scala.collection.Iterator$class.foreach(Iterator.scala:727)
	at scala.collection.AbstractIterator.foreach(Iterator.scala:1157)
	at scala.collection.MapLike$DefaultValuesIterable.foreach(MapLike.scala:206)
	at org.apache.samza.container.SamzaContainer.shutdownStores(SamzaContainer.scala:660)
	at org.apache.samza.container.SamzaContainer.run(SamzaContainer.scala:524)
	at org.apache.samza.container.SamzaContainer$.main(SamzaContainer.scala:82)
	at org.apache.samza.container.SamzaContainer.main(SamzaContainer.scala)
{noformat}

I think that this is because SamzaContainer catches the thrown exception, and then calls stop on everything. It seems that calling stop on a not-fully-initialized LevelDB JNI store can throw this exception. We should either wrap LevelDB's stop logic in a try/catch, or change the logic to check that shutting down LevelDB is safe.



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