5bd7e9c54f
This is just the first step in attempting to make all network connection have timeouts as a "safe default". TCP keepalives only protect against certain classes of network and host issues (e.g. server/OS crash), but do nothing against application-level issues (e.g. an application that accepts connections but then fails to serve requests). The actual keep-alive duration (15s) is chosen to cause broken connections to be closed after 2~3 minutes (depending on the OS, see #23549 for details). We don't make the actual default value part of the public API for a number of reasons: - because it's not very useful by itself: as discussed in #23549 the actual "timeout" after which the connection is torn down is duration*(KEEPCNT+1), and we use the OS-wide value for KEEPCNT because there's currently no way to set it from Go. - because it may change in the future: if users need to rely on a specific value they should explicitly set this value instead of relying on the default. Fixes #23459 Change-Id: I348c03be97588d5001e6de0f377e7a93b51957fd Reviewed-on: https://go-review.googlesource.com/c/107196 Run-TryBot: Ian Lance Taylor <iant@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org> |
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