客户端访问服务出现 cannot assign requested address

[chuxin0816]

客户端访问服务出现 cannot assign requested address

[chuxin0816]

1. client 侧是只调用initCommentClient一次，还是每次 wrk 发送请求过来都会调用？
2. client 侧有显式配置连接池么，怎么配置的？
3. 有试过适当调低 wrk 的压力(按梯度降低)，看是否会继续复现
4. 可以按照 @cgarm 同学的说法调整一下设置

1. 仅调用一次
2. 没有，使用的Kitex文档的示例代码
3. 降低压力后不会复现
4. 有用，修改后就没有问题了

[chuxin0816]

出现错误的请求只分布在压测后期，前期请求都是正常的

[cgarm]

It is possible that the "cannot assign requested address" error is caused by a shortage of available ports on the server side.
Expand the temporary port range.

sysctl -w net.ipv4.ip_local_port_range="MIN MAX"

For example, to set the ephemeral port range to 10000 - 65000, run:
sysctl -w net.ipv4.ip_local_port_range="10000 65000"

[DMwangnima]

1. client 侧是只调用initCommentClient一次，还是每次 wrk 发送请求过来都会调用？
2. client 侧有显式配置连接池么，怎么配置的？
3. 有试过适当调低 wrk 的压力(按梯度降低)，看是否会继续复现
4. 可以按照 @cgarm 同学的说法调整一下设置

[chuxin0816]

It is possible that the "cannot assign requested address" error is caused by a shortage of available ports on the server side. Expand the temporary port range.

sysctl -w net.ipv4.ip_local_port_range="MIN MAX"

For example, to set the ephemeral port range to 10000 - 65000, run: sysctl -w net.ipv4.ip_local_port_range="10000 65000"

Thank you very much. That's very helpful.