[Bug] doris upgrade 0.15 Data writing appears 'all partitions have no load data'

[JackFzy]

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• I had searched in the issues and found no similar issues.

Version

0.15

What's Wrong?

doris 从0.14升级到0.15版本后，原来离线任务和实时部分任务出现 写入失败问题 异常信息是 'all partitions have no load data'，
经排查发现，stream load请求返回成功行数和实际数据相比少一条，因此如果每批数据为1条时，会出现此错误， 单独请求stream load上传数据到doris 1条数据正常写入，因此推断可能是datax doris writer或 flink doris connector源码问题

What You Expected?

写入1条数据可以正常成功

How to Reproduce?

No response

Anything Else?

No response

Are you willing to submit PR?

• Yes I am willing to submit a PR!

Code of Conduct

• I agree to follow this project's Code of Conduct

[morningman]

source 是文件么？还是什么？

[hf200012]

This is a problem with multi-character delimiters, single-character delimiters are fine

[hf200012]

source 是文件么？还是什么？

test_1_0\x60\x60test_1_1\x60\x60test_1_2\x02\x02
test_1_0\x60\x60test_1_1\x60\x60test_1_2\x02\x02
test_1_0\x60\x60test_1_1\x60\x60test_1_2\x02\x02
test_1_0\x60\x60test_1_1\x60\x60test_1_2\x02\x02
test_1_0\x60\x60test_1_1\x60\x60test_1_2\x02\x02
test_1_0\x60\x60test_1_1\x60\x60test_1_2\x02\x02
test_1_0\x60\x60test_1_1\x60\x60test_1_2\x02\x02
test_1_0\x60\x60test_1_1\x60\x60test_1_2\x02\x02
test_1_0\x60\x60test_1_1\x60\x60test_1_2\x02\x02
test_1_0\x60\x60test_1_1\x60\x60test_1_2
Similarly, multi-byte line separators must be line separators at the end of each line, and there is no problem with single-byte line separators.
I am fixing the test