Description
The first time you run a job that uses state with changelog (such as in SAMZA-152), you get the following exception:
2014-03-04 18:15:20 SamzaContainer [ERROR] Caught exception in process loop. org.apache.samza.SamzaException: Missing a change log offset for SystemStreamPartition [partition=Partition [partition=1], system=kafka, stream=wikipedia-stats-changelog]. at org.apache.samza.storage.TaskStorageManager$$anonfun$startConsumers$3$$anonfun$1.apply(TaskStorageManager.scala:84) at org.apache.samza.storage.TaskStorageManager$$anonfun$startConsumers$3$$anonfun$1.apply(TaskStorageManager.scala:84) at scala.collection.MapLike$class.getOrElse(MapLike.scala:128) at scala.collection.AbstractMap.getOrElse(Map.scala:58) at org.apache.samza.storage.TaskStorageManager$$anonfun$startConsumers$3.apply(TaskStorageManager.scala:84) at org.apache.samza.storage.TaskStorageManager$$anonfun$startConsumers$3.apply(TaskStorageManager.scala:81) at scala.collection.TraversableLike$WithFilter$$anonfun$foreach$1.apply(TraversableLike.scala:772) at scala.collection.MapLike$MappedValues$$anonfun$foreach$3.apply(MapLike.scala:245) at scala.collection.MapLike$MappedValues$$anonfun$foreach$3.apply(MapLike.scala:245) at scala.collection.TraversableLike$WithFilter$$anonfun$foreach$1.apply(TraversableLike.scala:772) at scala.collection.immutable.Map$Map1.foreach(Map.scala:109) at scala.collection.TraversableLike$WithFilter.foreach(TraversableLike.scala:771) at scala.collection.MapLike$MappedValues.foreach(MapLike.scala:245) at scala.collection.TraversableLike$WithFilter.foreach(TraversableLike.scala:771) at org.apache.samza.storage.TaskStorageManager.startConsumers(TaskStorageManager.scala:81) at org.apache.samza.storage.TaskStorageManager.init(TaskStorageManager.scala:60) at org.apache.samza.container.TaskInstance.startStores(TaskInstance.scala:103) at org.apache.samza.container.SamzaContainer$$anonfun$startStores$2.apply(SamzaContainer.scala:579) at org.apache.samza.container.SamzaContainer$$anonfun$startStores$2.apply(SamzaContainer.scala:579) at scala.collection.Iterator$class.foreach(Iterator.scala:727) at scala.collection.AbstractIterator.foreach(Iterator.scala:1157) at scala.collection.MapLike$DefaultValuesIterable.foreach(MapLike.scala:206) at org.apache.samza.container.SamzaContainer.startStores(SamzaContainer.scala:579) at org.apache.samza.container.SamzaContainer.run(SamzaContainer.scala:504) at org.apache.samza.container.SamzaContainer$.main(SamzaContainer.scala:81) at org.apache.samza.container.SamzaContainer.main(SamzaContainer.scala)
If debug logging is turned on, the following telltale line appears in the log earlier:
2014-03-04 18:15:20 KafkaSystemAdmin [DEBUG] Got metadata for streams: Map(wikipedia-stats-changelog -> {TopicMetadata for topic wikipedia-stats-changelog -> No partition metadata for topic wikipedia-stats-changelog due to kafka.common.LeaderNotAvailableException})