Amit Sela created BEAM-649: ------------------------------ Summary: Pipeline "actions" should use foreachRDD via ParDo. Key: BEAM-649 URL: https://issues.apache.org/jira/browse/BEAM-649 Project: Beam Issue Type: Bug Components: runner-spark Reporter: Amit Sela Assignee: Amit Sela
Spark will execute a pipeline ONLY if it's triggered by an action (batch) / output operation (streaming) - http://spark.apache.org/docs/1.6.2/streaming-programming-guide.html#output-operations-on-dstreams. Currently, such actions in Beam are mostly implemented via ParDo, and translated by the runner as a Map transformation (via mapPartitions). The runner overcomes this by "forcing" actions on untranslated leaves. While this is OK, it would be better in some cases, e.g., Sinks, to apply the same ParDo translation but with foreach/foreachRDD instead of foreachPartition/mapPartitions. -- This message was sent by Atlassian JIRA (v6.3.4#6332)