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Posted to issues@trafficserver.apache.org by GitBox <gi...@apache.org> on 2021/08/24 14:29:37 UTC
[GitHub] [trafficserver] masaori335 opened a new issue #8273: POST requests get INACTIVITY_TIMEOUT immediately
masaori335 opened a new issue #8273:
URL: https://github.com/apache/trafficserver/issues/8273
@elsloo found that inactive timeout is odd on POST request cases on our 9.0.3 deployment.
When this issue happens, debug logs are below. It looks like the HttpSM starts TLS handshake with origin server and read op of inbound side connection is disabled. But the inactive_cop closed the inbound connection immediately.
```
[Aug 24 02:05:31.976] [ET_NET 19] DEBUG: <HttpSM.cc:5272 (do_http_server_open)> (http) calling sslNetProcessor.connect_re
...
[Aug 24 02:05:31.976] [ET_NET 19] DEBUG: <HttpSM.cc:1817 (state_http_server_open)> (http) [10713971] setting handler for TCP handshake
[Aug 24 02:05:31.976] [ET_NET 19] DEBUG: <P_UnixNet.h:554 (read_disable)> (socket) read_disable updating inactivity_at 0, NetEvent=0x7fbf7811dc30
...
[Aug 24 02:05:32.552] [ET_NET 19] DEBUG: <UnixNet.cc:56 (check_inactivity)> (inactivity_cop_check) Checking inactivity on Thread-ID #19
[Aug 24 02:05:32.552] [ET_NET 19] DEBUG: <UnixNet.cc:574 (manage_active_queue)> (v_net_queue) max_connections_per_thread_in: 4687 max_requests_per_thread_in: 937 total_connections_in: 12 active_queue_size: 10 keep_alive_queue_size: 2
[Aug 24 02:05:32.552] [ET_NET 19] DEBUG: <UnixNet.cc:683 (_close_ne)> (net_queue) closing connection NetEvent=0x7fbf7811dc30 idle: 2 now: 1629770732 at: 0 in: 70 diff: 1629770802
[Aug 24 02:05:32.552] [ET_NET 19] DEBUG: <HttpSM.cc:2632 (main_handler)> (http) [10713971] [HttpSM::main_handler, VC_EVENT_INACTIVITY_TIMEOUT/TS_EVENT_VCONN_INACTIVITY_TIMEOUT]
```
I think #7304 introduced this behavior. The is gone by reverting the commit.
To fix this issue with #7304, we need to check the `ne->next_inactivity_timeout_at` before closing the connection by the inactive_cop. A caveat is connection throttling is using the same function (`NetHandler::manage_keep_alive_queue()`).
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[GitHub] [trafficserver] masaori335 closed issue #8273: POST requests get INACTIVITY_TIMEOUT immediately
Posted by GitBox <gi...@apache.org>.
masaori335 closed issue #8273:
URL: https://github.com/apache/trafficserver/issues/8273
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[GitHub] [trafficserver] masaori335 commented on issue #8273: POST requests get INACTIVITY_TIMEOUT immediately
Posted by GitBox <gi...@apache.org>.
masaori335 commented on issue #8273:
URL: https://github.com/apache/trafficserver/issues/8273#issuecomment-905240106
We found 2 things. I'm working on writing up an AuTest and fixing it.
1. this happens only if `proxy.config.net.max_requests_in` is set (default value is `0`)
https://github.com/apache/trafficserver/blob/2d49a40aaed82792024dd09b291fc4dea9f806ac/iocore/net/UnixNet.cc#L581-L584
2. the reason why # 7304 introduced the problem is the below condition.
https://github.com/apache/trafficserver/blob/2d49a40aaed82792024dd09b291fc4dea9f806ac/iocore/net/UnixNet.cc#L606-L609
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[GitHub] [trafficserver] shinrich commented on issue #8273: POST requests get INACTIVITY_TIMEOUT immediately
Posted by GitBox <gi...@apache.org>.
shinrich commented on issue #8273:
URL: https://github.com/apache/trafficserver/issues/8273#issuecomment-907245496
Ah, that makes sense why we have not run into this. We are running with max_requests_in set to the default of 0.
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