fix: 当网络异常时,如果配置了自动重连, 还是执行一次自动重连. #607
Closed
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
ithewei
reviewed
Aug 14, 2024
| static void reconnect_timer_cb(htimer_t* timer) { | ||
| mqtt_client_t* cli = (mqtt_client_t*)hevent_userdata(timer); | ||
| if (cli == NULL) return; | ||
| if(cli->timer)htimer_del(cli->timer); |
There was a problem hiding this comment.
我知道，但多次重连会多次创建。 因此这里还是需要显式删除的。
There was a problem hiding this comment.
reconnect_timer_cb这个回调触发说明这个定时器已经到期了，回调执行完后内部会自动释放掉的。
多次创建，再保存的也是下次创建出来的了，上次的已经释放了。
ithewei
reviewed
Aug 14, 2024
| cli->port = port; | ||
| cli->ssl = ssl; | ||
| hio_t* io = hio_create_socket(cli->loop, host, port, HIO_TYPE_TCP, HIO_CLIENT_SIDE); | ||
| if (io == NULL) return -1; |
There was a problem hiding this comment.
场景一： 正常情况下互联网断开，比如插拔网线，重启网卡等操作、网络掉线。 会导致hio_create_socket 返回 null。重连函数 只是简单的调用了一次 连接方法。 造成的现象是。 网络掉线一次，哪怕后续路由器重新拨号上了网络。重连也不会再继续了。
场景二： 作为 windows 后台服务运行的时候，可能windows 进入桌面了 网络还没有就绪。此时后台服务早已经启动。因为 连接函数 中断在 hio_t* io = hio_create_socket(cli->loop, host, port, HIO_TYPE_TCP, HIO_CLIENT_SIDE); 返回的nullptr 而导致配置的重连机制不会生效。
There was a problem hiding this comment.
应该是域名解析这一步报错了？正常来说socket创建是不会报错的
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
之前存在的问题, 如果网络异常导致的连接断开，会收到一次onClose. 如果配置了自动重连会去重连. 然而 当重连的时候 socket 创建失败(网络异常导致). 则无法收到任何异常信息，且不会再次执行重连。
本次修改后, 即使网卡未就绪，网络连接未通，如果配置了重连，依旧会根据重连规则去重试，如果未配置自动重连，则返回-1.
即使是网络异常导致的产生了一次onClose 重连失败时，重连动作依有效。