Ryan Blue created SPARK-20084:
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Summary: Remove internal.metrics.updatedBlockStatuses accumulator
from history files
Key: SPARK-20084
URL: https://issues.apache.org/jira/browse/SPARK-20084
Project: Spark
Issue Type: Improvement
Components: Spark Core, Web UI
Affects Versions: 2.1.0
Reporter: Ryan Blue
History files for large jobs can be hundreds of GB. These history files take
too much space and create a backlog on the history server.
Most of the size is from Accumulables in SparkListenerTaskEnd. The largest
accumulable is internal.metrics.updatedBlockStatuses, which has a small update
(the blocks that were changed) but a huge value (all known blocks). Nothing
currently uses the accumulator value or update, so it is safe to remove it.
Information for any block updated during a task is also recorded under Task
Metrics / Updated Blocks.
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