"write tcp xxx:17947->yyy:20000: i/o timeout" occurs frequently #104
Comments
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Would you please give an example just using getty without dubbo-go to reproduce this problem？ |
I will try it, and I noticed that dubbo-go uses getty RPCClient to maintain multiple getty.Session, randomly selecting one for each request, which may be related to this. It is possible to obtain a session whose deadline is about to expire or has expired. |
This may be the same problem： AlexStocks#14 |
|
把超时时间设置短点 |
@rnben 不知道你的超时时间设置了多长？设置 3s 就足够了，不要太长，如 30s。 我们尝试修改下如下逻辑: // Optimization: update read deadline only if more than 25%
// of the last read deadline exceeded.
// See https://github.com/golang/go/issues/15133 for details.
currentTime = time.Now()
if currentTime.Sub(t.rLastDeadline.Load()) > t.rTimeout.Load()>>2 {
if err = t.conn.SetReadDeadline(currentTime.Add(t.rTimeout.Load())); err != nil {
// just a timeout error
return 0, perrors.WithStack(err)
}
t.rLastDeadline.Store(currentTime)
}为： timeDuration := t.rTimeout.Load()>>2
if timeDuration > 500e8 {
timeDuration = 500e8
}
currentTime = time.Now()
if currentTime.Sub(t.rLastDeadline.Load()) > timeDuration {
if err = t.conn.SetReadDeadline(currentTime.Add(t.rTimeout.Load())); err != nil {
// just a timeout error
return 0, perrors.WithStack(err)
}
t.rLastDeadline.Store(currentTime)
} |
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What happened:
What you expected to happen:
The following configuration file shows that the
request-timeouthas been set to 1minute, which is valid.However, a write timeout error always occurs after multiple requests，In fact, the request does not exceed 10s!!
I find that commenting out
currentTime.Sub(t.wLastDeadline.Load()) > t.wTimeout.Load()>>2can solve this problem.How to reproduce it (as minimally and precisely as possible):
It can be reproduced by running the demo program。
https://github.com/rnben/dubbo-demo/blob/master/README.md
Anything else we need to know?:
All the other information is there：https://github.com/rnben/dubbo-demo
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