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-rwxr-xr-xindra/llcorehttp/_httpoprequest.cpp17
1 files changed, 16 insertions, 1 deletions
diff --git a/indra/llcorehttp/_httpoprequest.cpp b/indra/llcorehttp/_httpoprequest.cpp
index fbbb1614fb..7482a89dac 100755
--- a/indra/llcorehttp/_httpoprequest.cpp
+++ b/indra/llcorehttp/_httpoprequest.cpp
@@ -623,8 +623,23 @@ HttpStatus HttpOpRequest::prepareRequest(HttpService * service)
// a handwave but bump the transfer timeout up by the pipelining
// depth to give some room.
//
+ // BUG-7698, BUG-7688, BUG-7694 (others). Scylla and Charybdis
+ // situation. Operating against a CDN having service issues may
+ // lead to requests stalling for an arbitrarily long time with only
+ // the CURLOPT_TIMEOUT value leading to a closed connection. Sadly
+ // for pipelining, libcurl (7.39.0 and earlier, at minimum) starts
+ // the clock on this value as soon as a request is started down
+ // the wire. We want a short value to recover and retry from the
+ // CDN. We need a long value to safely deal with a succession of
+ // piled-up pipelined requests.
+ //
// *TODO: Find a better scheme than timeouts to guarantee liveness.
- xfer_timeout *= cpolicy.mPipelining;
+ // Progress on the connection is what we really want, not timeouts.
+ // But we don't have access to that and the request progress indicators
+ // (various libcurl callbacks) have the same problem TIMEOUT does.
+ //
+ // xfer_timeout *= cpolicy.mPipelining;
+ xfer_timeout *= 2L;
}
// *DEBUG: Enable following override for timeout handling and "[curl:bugs] #1420" tests
// xfer_timeout = 1L;