doris集群运行正常，没有节点挂掉
执行sql就会报错，有时候直接连接不上doris，重启be节点才行
errorCode=CANCELLED, errorMsg=(be3.doris.server)[CANCELLED]Failed to submit scanner to scanner pool reason:Thread pool Scan_normal is at capacity (256/256 tasks running, 102400/102400 tasks queued)|type:0
或者
(be3.doris.server[CANCELLEDjThread pool FragmentigrThreadpool is at capacity (2048/2048 tasks running, 4096/4096 tasks queued
大佬们，怎么解决
