Revert "tcp_proxy: convert TCP proxy to use TCP connection pool (#3938)" #4043
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This reverts commit 028387a. Signed-off-by: Daniel Hochman <danielhochman@users.noreply.github.com>
mattklein123
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Converts TcpProxy::Filter and WebSocket::WsHandlerImpl to use Tcp::ConnectionPool to obtain connections. Much of the stats handling and connection timeouts are handled by the connection pool. Stats were manually verified by comparing stats produced by the tcp_proxy_integration_test with and without the connection pool change. This reapplies an earlier changed reverted due to envoyproxy#4043. That bug is fixed by performing the connection pools state management before forwarding callbacks. *Risk Level*: medium *Testing*: unit/integration testing *Docs Changes*: n/a *Release Notes*: n/a *Fixes*: envoyproxy#4043 Signed-off-by: Stephan Zuercher <stephan@turbinelabs.io>
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…arding callbacks and tracking whether the connection has been invalidated or not (allowing the callback to use the connection to e.g., obtain a dispatcher). Signed-off-by: Stephan Zuercher <stephan@turbinelabs.io>
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Signed-off-by: Daniel Hochman danielhochman@users.noreply.github.com
This reverts commit 028387a, #3938.
After this PR was deployed to production, our instances would periodically experience a sharp and sustained uptick in CPU.
I removed traffic from one of the instances. It continued to consume 50% CPU. I took a perf capture to get the call stack which pointed me to this PR in the diff.
For fun I also generated a flame graph.