add debug tool for remote run #19833
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ouyuanning
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What type of PR is this?
Which issue(s) this PR fixes:
issue #19801
What this PR does / why we need it:
add debug tool for remote run
主要解决在查hung问题的时候，有时候是hung在等其他cn的某个go routine执行结果的返回。
而之前从 txn leak里只能跟踪到直接hung的那个go routine，不知道被等待的那个go routine是什么，这里通过一个注入语句，可以在运行时增加对应的log信息，以便通过等待的compile的内存指针，去找被等待的那个go routine id
使用方法：
假设要执行的sql是： update test_table set b = b + 1 where a < 5000000;
select mo_ctl("dn", "addfaultpoint", "enable_fault_injection");
select mo_ctl("dn", "addfaultpoint", "inject_send_pipeline.1:1:1:.echo.1.test_table"); //在使用时只要修改这里的 test_table 为你要执行的sql的关键字就好了。
那么我们将可以在日志上看到类似这样的日志：
这样就可以根据txn leak的go routine堆栈去找出问题的地方了