On Wed, 25 Oct 2023 17:27:57 GMT, Daniel Jeliński <[email protected]> wrote:

> This patch fixes a race between the selector thread and the IdleTimeoutTask 
> which closes connections that were idle for longer than IDLE_INTERVAL. With 
> this patch, only the thread that successfully removes the connection from 
> idleConnections is permitted to change it. If any data arrives after the 
> IdleTimeoutTask removes the connection from idleConnections, the data is 
> ignored.
> 
> Additionally, this patch reduces the time interval between when the 
> IdleTimeoutTask removes the connection from idleConnections and when the 
> connection is closed, back to pre-JDK-8286918 level.
> 
> No new test; with platform sockets it's next to impossible to reliably get 
> the timing right. Existing tier1-3 tests pass.

src/jdk.httpserver/share/classes/sun/net/httpserver/ServerImpl.java line 1032:

> 1030:             ArrayList<HttpConnection> toClose = new ArrayList<>();
> 1031: 
> 1032:             connections.forEach(c -> {

Shouldn't we still be synchronizing on `connections` as per the advice in 
`Collections::synchronizedSet` ?

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PR Review Comment: https://git.openjdk.org/jdk/pull/16366#discussion_r1377288530

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