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Clarify underlying Mercurial version
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According to Isabelle/597059a44d6f it is better to use Mercurial 2.8.2 to imitate (see also

On the other hand, a global /usr/local/bin/hg that is rather old also causes problems, e.g. excessive CPU usage with hgwebdir behind (due to web crawlers exploring the site).

There are various possibilities and workarounds, e.g. different local Mercurial installations for different purposes. Eventually, it is better to get Phabricator updated according to

diff --git a/src/applications/diffusion/protocol/DiffusionMercurialWireProtocol.php b/src/applications/diffusion/protocol/DiffusionMercurialWireProtocol.php
index 251935a6d..b90c40842 100644
--- a/src/applications/diffusion/protocol/DiffusionMercurialWireProtocol.php
+++ b/src/applications/diffusion/protocol/DiffusionMercurialWireProtocol.php
@@ -126,6 +126,7 @@ final class DiffusionMercurialWireProtocol extends Phobject {
+    array_push($parts, 'httpheader=1024');
     return implode(' ', $parts);

Event Timeline

makarius triaged this task as Low priority.Jan 12 2020, 3:50 PM
makarius created this task.
makarius claimed this task.Jan 12 2020, 4:05 PM
makarius added a project: phabricator-setup.
makarius closed this task as Resolved.Feb 14 2020, 9:27 PM

Following Isabelle/8b0b8b9ea653, Mercurial 3.9.2 from 23-Sep-2016 is fine for now:

  • It avoids odd branch cache problem (4.0 ... 5.0.1).
  • It avoids odd httpheader=1024 problem (after 4.1).
  • It can pull without SSL certificate issues.

Thus it can be installed centrally as /usr/local/bin/hg and used uniformly without special tricks.

makarius updated the task description. (Show Details)Feb 14 2020, 9:30 PM
makarius updated the task description. (Show Details)
makarius updated the task description. (Show Details)