zhaojs

In the linux tcp epoll mode, some conditions will lead to starvation when reading, as well as data loss and repeated sending problems in the buffer to be written in the connection

1

The three questions are as follows: **1.** When writing data to fd through the loopWrite function, you should check the number of successfully written bytes returned, because when writing some...

pdns recursor crash on startup，The probability of crash is relatively high

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- **system version**: Debian 9 - **kernal version**: Linux 4.19.117.bsk.10-amd64 - **pdns recursor version**: 4.7.1 - **gcc/g++ version**: 6.3.0 - **crash infos**: Thread 8 "pdns-r/distr" received signal SIGSEGV, Segmentation fault....

Client连接异常情况，发包失败

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在Client发包里，可否加一个连接正常状态的检查？看了一遍源码，比如一种case在连接刚被各种异常网络情况断开后，发送了message，此时message将会发送失败，wirteLoop会退出。可否在asyncWrite中加上连接是否正常的状态检查，连接不正常，则重新进行Dial连接，但是这样会阻塞asyncWrite的调用。

The recursor cache needs to check stale when updating the ns type cache.

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### Short description When an NS record already exists in the recursor cache and the NS record is replaced again, the **TTD** setting of the NS record should check the...