[SPARK-29814][MLLIB] Missing persist on sources in mllib.feature.PCA #26451
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Can one of the admins verify this patch? |
amanomer
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What changes were proposed in this pull request?
Use persist on RDD which is used for more than one action.
Why are the changes needed?
The rdd
sourcesis used in more than one actions:first() and actions incomputePrincipalComponentsAndExplainedVariance(), so it needs to be persisted.Does this PR introduce any user-facing change?
No
How was this patch tested?
Manually