[Bug] be使用ipv6地址，进行ssb压测时，全部挂掉

[xleoken]

Search before asking

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

Version

1. version, 测试过2.1.5 3.0.1 版本

2. hosts 配置信息

3409:8d20:1833:da29::19 DORIS-CMCC-001
3409:8d20:1833:da29::11 DORIS-CMCC-002

3. 添加 BE，也有配置 enable_fqdn_mode = true

ALTER SYSTEM ADD BACKEND "DORIS-CMCC-001:9050";
ALTER SYSTEM ADD BACKEND "DORIS-CMCC-002:9050";

4. 执行 ssb 压测， https://doris.apache.org/docs/benchmark/ssb

在执行过程中，后端BE会挂掉

5. 日志

fe-001.log.tar.gz

be-001.log.tar.gz

be-002.log.tar.gz

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

[yuanyuan8983]

Hello, if it is convenient to add my wechat, we will have a look together, my wechat signal is: Liyy_222_8993

[yuanyuan8983]

Explain the above questions:
brpc does not support ipv6 hostname resolution, resulting in connection initialization failure, nullptr is returned.
Calling get_client without checking nullptr results in coredump.
This PR fixes the nullptr check : #40074

[xleoken]

Explain the above questions: brpc does not support ipv6 hostname resolution, resulting in connection initialization failure, nullptr is returned. Calling get_client without checking nullptr results in coredump. This PR fixes the nullptr check : #40074

好的，等新版发布之后，我验证一下