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https://issues.apache.org/jira/browse/SAMZA-965?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16426048#comment-16426048
]
Prateek Maheshwari commented on SAMZA-965:
------------------------------------------
This usually happens when another container running on the same host processing
the same partitions (usually an "orphaned container" from a previous deploy) is
still holding the file lock. This should be less common now since
ContainerHeartbeatMonitor shuts such containers down after some time.
> Occasional error opening RocksDB store
> --------------------------------------
>
> Key: SAMZA-965
> URL: https://issues.apache.org/jira/browse/SAMZA-965
> Project: Samza
> Issue Type: Bug
> Reporter: Jake Maes
> Priority: Major
>
> org.apache.samza.SamzaException: Error opening RocksDB store member-settings
> at location /storeDir/jobName-jobId/storeName/Partition_95, received the
> following exception from RocksDB org.rocksdb.RocksDBException: IO error: lock
> /storeDir/jobName-jobId/storeName/Partition_95/LOCK: Resource temporarily
> unavailable
> at
> org.apache.samza.storage.kv.RocksDbKeyValueStore$.openDB(RocksDbKeyValueStore.scala:86)
> at
> org.apache.samza.storage.kv.RocksDbKeyValueStore.db$lzycompute(RocksDbKeyValueStore.scala:108)
> at
> org.apache.samza.storage.kv.RocksDbKeyValueStore.db(RocksDbKeyValueStore.scala:108)
> at
> org.apache.samza.storage.kv.RocksDbKeyValueStore.putAll(RocksDbKeyValueStore.scala:162)
> at
> org.apache.samza.storage.kv.KeyValueStorageEngine.restore(KeyValueStorageEngine.scala:114)
> at
> org.apache.samza.storage.TaskStorageManager$$anonfun$restoreStores$3.apply(TaskStorageManager.scala:182)
> at
> org.apache.samza.storage.TaskStorageManager$$anonfun$restoreStores$3.apply(TaskStorageManager.scala:176)
> at
> scala.collection.TraversableLike$WithFilter$$anonfun$foreach$1.apply(TraversableLike.scala:772)
> at
> scala.collection.immutable.HashMap$HashMap1.foreach(HashMap.scala:224)
> at
> scala.collection.immutable.HashMap$HashTrieMap.foreach(HashMap.scala:403)
> at
> scala.collection.TraversableLike$WithFilter.foreach(TraversableLike.scala:771)
> at
> org.apache.samza.storage.TaskStorageManager.restoreStores(TaskStorageManager.scala:176)
> at
> org.apache.samza.storage.TaskStorageManager.init(TaskStorageManager.scala:70)
> at
> org.apache.samza.container.TaskInstance.startStores(TaskInstance.scala:99)
> at
> org.apache.samza.container.SamzaContainer$$anonfun$startStores$2.apply(SamzaContainer.scala:664)
> at
> org.apache.samza.container.SamzaContainer$$anonfun$startStores$2.apply(SamzaContainer.scala:662)
> at scala.collection.Iterator$class.foreach(Iterator.scala:727)
> at scala.collection.AbstractIterator.foreach(Iterator.scala:1157)
> at
> scala.collection.MapLike$DefaultValuesIterable.foreach(MapLike.scala:206)
> at
> org.apache.samza.container.SamzaContainer.startStores(SamzaContainer.scala:662)
> at
> org.apache.samza.container.SamzaContainer.run(SamzaContainer.scala:575)
> at
> org.apache.samza.container.SamzaContainer$.safeMain(SamzaContainer.scala:97)
> at
> org.apache.samza.container.SamzaContainer$.main(SamzaContainer.scala:71)
> at org.apache.samza.container.SamzaContainer.main(SamzaContainer.scala)
> A quick search didn't turn up any rocksdb fixes.
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