Github user shivaram commented on the issue:
https://github.com/apache/spark/pull/21278
Ah I know the problem with the vignettes - if you have _JAVA_OPTIONS set
then the line numbers change. i.e. the output looks like
```
shivaram@localhost ~ » export _JAVA_OPTIONS="-XX:-UsePerfData"
shivaram@localhost ~ » java -version
Picked up _JAVA_OPTIONS: -XX:-UsePerfData
java version "1.8.0_92"
```
We need to find the line with 'java version' in it. I'll fix this in the
morning
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