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

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

     [ https://issues.apache.org/jira/browse/SAMZA-347?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Chris Riccomini updated SAMZA-347:
----------------------------------

    Labels: newbie  (was: )

> 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
>              Labels: newbie
>             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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