Untitled

% arc diff --trace
... snipped for brevity ...
>>> [26] (+581) <http> https://phabricator.host/api/repository.query
<<< [26] (+634) <http> 53,039 us
>>> [27] (+634) <http> https://phabricator.host/api/differential.creatediff
<<< [27] (+30,680) <http> 30,045,660 us

[2019-08-28 10:31:16] EXCEPTION: (HTTPFutureHTTPResponseStatus) [HTTP/408]

<html><head>
<meta http-equiv="content-type" content="text/html;charset=utf-8">
<title>408 Request Timeout</title>
</head>
<body text=#000000 bgcolor=#ffffff>
<h1>Error: Request Timeout</h1>
<h2>Your client has taken too long to issue its request.</h2>
<h2></h2>
</body></html> at [<phutil>/src/future/http/BaseHTTPFuture.php:351]
arcanist(head=stable, ref.master=3534d2baca4b, ref.stable=feb5f4d42c4f), phutil(head=stable, ref.master=35d0ec2dfa59, ref.stable=8df85007f38e)
  #0 BaseHTTPFuture::parseRawHTTPResponse(string) called at [<phutil>/src/future/http/HTTPSFuture.php:418]
  #1 HTTPSFuture::isReady() called at [<phutil>/src/future/Future.php:37]
  #2 Future::resolve(NULL) called at [<phutil>/src/future/FutureProxy.php:34]
  #3 FutureProxy::resolve() called at [<phutil>/src/conduit/ConduitClient.php:64]
  #4 ConduitClient::callMethodSynchronous(string, array) called at [<arcanist>/src/workflow/ArcanistDiffWorkflow.php:518]
  #5 ArcanistDiffWorkflow::run() called at [<arcanist>/scripts/arcanist.php:394]
[Exit 255 (0)]