Just saw that there are many people with >= 8 open PRs. Some are legitimately in flight but many are probably stale. To set a good example, would (everyone) mind flicking through what they've got open and see if some PRs are stale and should be closed?
https://spark-prs.appspot.com/users UsernameOpen PRs ▴ viirya <https://spark-prs.appspot.com/users/viirya> 13 hhbyyh <https://spark-prs.appspot.com/users/hhbyyh> 12 zhengruifeng <https://spark-prs.appspot.com/users/zhengruifeng> 12 HyukjinKwon <https://spark-prs.appspot.com/users/HyukjinKwon> 12 maropu <https://spark-prs.appspot.com/users/maropu> 10 kiszk <https://spark-prs.appspot.com/users/kiszk> 10 yanboliang <https://spark-prs.appspot.com/users/yanboliang> 10 cloud-fan <https://spark-prs.appspot.com/users/cloud-fan> 8 jerryshao <https://spark-prs.appspot.com/users/jerryshao> 8