BIBO on limbo305

[lingu]

insert is not very stable.

Code:

[sage@limbo305-1 test]$ make test cases=insert_zeng
Testing insert_zeng
    run test  ./test_insert_zeng.sh
sending insert request ./processed/zengxingliang-newkey.json
return code: 416
insert failed
make: *** [Makefile:22: test] Error 93
[sage@limbo305-1 test]$ make test cases=insert_zeng
Testing insert_zeng
    run test  ./test_insert_zeng.sh
sending insert request ./processed/zengxingliang-newkey.json
return code: 200
insert success
[sage@limbo305-1 test]$

zhihao pls investigate this issue.