出現這種問題的時候建議是：
1、調大堆內存，根本方法
2、調小XX:InitiatingHeapOccupancyPercent、調大XX:ConcGCThread
3、打印XX:+PrintAdaptiveSizePolicy，youngGC默認沒什么線索，這個打印出來可以看到更多線索
G1回收器沒有深入了解過。。。。。
參考資料
https://www.baidu.com/s?ie=utf-8&f=8&rsv_bp=1&rsv_idx=1&tn=baidu&wd=Parallel%20Time%3A%202699.8%20ms%2C%20GC%20Workers&fenlei=256&rsv_pq=ac1e26e3000103a9&rsv_t=c96dpP%2FiuU1jER59XrDCAoECjj4JaehrkppjOd6FysNclU1hTo8ljbzIk20&rqlang=cn&rsv_enter=1&rsv_dl=tb&rsv_n=2&rsv_sug3=1&rsv_sug2=0&rsv_btype=i&inputT=1616&rsv_sug4=1616
https://blog.csdn.net/vfgbv/article/details/51720344
https://blog.csdn.net/lijingyao8206/article/details/80566384
https://cn.bing.com/search?q=to-space%20exhausted%20%20%20%20Evacuation%20Failure&qs=n&form=QBRE&sp=-1&pq=to-space%20exhausted%20evacuation%20failure&sc=0-37&sk=&cvid=E84E0E78CC6140BC8AA65241A65C87EE
https://stackoverflow.com/questions/30796111/g1-young-gc-does-not-free-memory-to-space-exhausted
https://www.infoq.com/articles/tuning-tips-G1-GC/
https://databricks.com/blog/2015/05/28/tuning-java-garbage-collection-for-spark-applications.html
https://blog.csdn.net/weixin_30267691/article/details/102268061