GitHub user hellodengfei opened a pull request:
https://github.com/apache/spark/pull/22420
SPARK-25429
Use Set improve SparkListenerBus efficient
## What changes were proposed in this pull request?
Use Set instead of Array to provide lookup performance: Set
Github user hellodengfei commented on the issue:
https://github.com/apache/spark/pull/20304
Sorry, it's too late for UT.
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GitHub user hellodengfei opened a pull request:
https://github.com/apache/spark/pull/20304
[SPARK-23139]Read eventLog file with mixed encodings
## What changes were proposed in this pull request?
EventLog may contain mixed encodings such as custom exception message
