GitHub user zhengruifeng opened a pull request:
https://github.com/apache/spark/pull/22971
[SPARK-25970][ML] Add Instrumentation to PrefixSpan
## What changes were proposed in this pull request?
Add Instrumentation to PrefixSpan
## How was this patch tested?
existing tests
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/zhengruifeng/spark log_PrefixSpan
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/22971.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #22971
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commit fd15a57823efc2c8d3c4fa0883452c0e1815bd73
Author: zhengruifeng <ruifengz@...>
Date: 2018-11-08T06:45:36Z
init
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