当前版本：2.1.9
问题起因是今天有一个be发生了重启，在查看be.out文件的时候发现大小异常。
做了资源划分，相同资源组的be节点也存在该现象。（该资源组内streamload任务较多）
其他资源组看起来文件大小是正常的
查看文件内容，发现存在大量的重复行
/home/zcp/repo_center/doris_branch-2.1/doris/thirdparty/src/re2-2021-02-02/re2/re2.cc:748: DFA out of memory: pattern length 366376, program size 1565
51, list count 146638, bytemap range 54
/home/zcp/repo_center/doris_branch-2.1/doris/thirdparty/src/re2-2021-02-02/re2/re2.cc:748: DFA out of memory: pattern length 366376, program size 1565
51, list count 146638, bytemap range 54
/home/zcp/repo_center/doris_branch-2.1/doris/thirdparty/src/re2-2021-02-02/re2/re2.cc:748: DFA out of memory: pattern length 366376, program size 1565
51, list count 146638, bytemap range 54
/home/zcp/repo_center/doris_branch-2.1/doris/thirdparty/src/re2-2021-02-02/re2/re2.cc:748: DFA out of memory: pattern length 366376, program size 1565
51, list count 146638, bytemap range 54
/home/zcp/repo_center/doris_branch-2.1/doris/thirdparty/src/re2-2021-02-02/re2/re2.cc:748: DFA out of memory: pattern length 366376, program size 1565
51, list count 146638, bytemap range 54
/home/zcp/repo_center/doris_branch-2.1/doris/thirdparty/src/re2-2021-02-02/re2/re2.cc:748: DFA out of memory: pattern length 366376, program size 1565
51, list count 146638, bytemap range 54
在搜索时发现之前有人提出过这个问题，但是没有回应。
https://github.com/apache/doris/issues/27457
另外还发现一个re2的提问，不知道有用没。
https://github.com/google/re2/issues/186
