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https://issues.apache.org/jira/browse/SPARK-16000?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15627151#comment-15627151
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Joseph K. Bradley commented on SPARK-16000:
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I just checked through, and the PRs cover all MLWritable types from 1.6.
> Make model loading backward compatible with saved models using old vector
> columns
> ---------------------------------------------------------------------------------
>
> Key: SPARK-16000
> URL: https://issues.apache.org/jira/browse/SPARK-16000
> Project: Spark
> Issue Type: Sub-task
> Components: ML, MLlib
> Reporter: Xiangrui Meng
> Assignee: yuhao yang
> Fix For: 2.1.0
>
>
> To help users migrate from Spark 1.6. to 2.0, we should make model loading
> backward compatible with models saved in 1.6. The main incompatibility is the
> vector column type change.
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