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Posted to issues@openwhisk.apache.org by GitBox <gi...@apache.org> on 2019/01/19 02:05:03 UTC
[GitHub] AprliRainkun opened a new issue #111: Cannot reuse TCP connection
across action invocations
AprliRainkun opened a new issue #111: Cannot reuse TCP connection across action invocations
URL: https://github.com/apache/incubator-openwhisk-client-go/issues/111
In the current implimentation, `LoadX509KeyPair()` is executed when making a new http request. As a result, a new `Transport` is created for each request. However, TCP connections cannot be reused across different transports. This will cause the program to reach fd limits quickly under a heavy load, e.g., invoke actions programmingly.
Here is a demo of the deficiency:
When I invoke an action (host ip: `13.66.***.**`) sequentially for a couple of times, several connections are established. Idealy, only one connection should be created and reused.
```
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 localhost:socks 0.0.0.0:* LISTEN
tcp 0 0 localhost:1188 0.0.0.0:* LISTEN
tcp 0 0 mingyu-virtual-ma:35702 13.66.***.**:https ESTABLISHED
tcp 0 0 mingyu-virtual-ma:35698 13.66.***.**:https ESTABLISHED
tcp 0 0 mingyu-virtual-ma:35696 13.66.***.**:https ESTABLISHED
tcp 0 0 mingyu-virtual-ma:35700 13.66.***.**:https ESTABLISHED
tcp 0 0 mingyu-virtual-ma:35704 13.66.***.**:https ESTABLISHED
tcp 0 0 mingyu-virtual-ma:35694 13.66.***.**:https ESTABLISHED
tcp6 0 0 ip6-localhost:ipp [::]:* LISTEN
tcp6 0 0 ip6-localhost:socks [::]:* LISTEN
```
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