Doug Cutting has posted on the topic of thread safety a couple of times.

Doug Cutting曾几次发表线程安全性的主题。

youdao

You'll notice the same theme if you hang out on the lucene-user list and listen to Doug Cutting answering questions.

如果你在Lucene用户列表上闲逛或者听Doug Cutting回答问题，你会看到同样的主题。

youdao

Doug Cutting (DC) : Yahoo! Regularly USES Hadoop for research tasks to improve its products and services such as ranking functions, AD targeting, etc.

Doug Cutting (DC)： Yahoo定期在搜索业务上使用Hadoop来提高其产品和服务，如排名功能和目标广告等。

youdao

Doug Cutting, then working at Yahoo, saw its potential and created Hadoop, which works with off-the-shelf hardware to manage data too big for conventional databases.

FORBES: How Hadoop Makes Short Work of Big Data