Mercurial > hg-stable
changeset 23084:3ef893520a85 stable
setdiscovery: limit the size of the initial sample (issue4411)
The set discovery start by sending a "known" command with all local heads. When
the number of local heads is massive (eg: using hidden changesets) such request
becomes too large. This lead to 414 error over http, aborting the whole
process.
We limit the size of the sample used by the first query to fix this.
The test are impacted because they do test massive number of heads. But they do
not test it over real world http setup.
| author | Pierre-Yves David <pierre-yves.david@fb.com> |
|---|---|
| date | Mon, 27 Oct 2014 17:52:33 +0100 |
| parents | ee45f5c2ffcc |
| children | e9165c18f8df |
| files | mercurial/setdiscovery.py tests/test-setdiscovery.t |
| diffstat | 2 files changed, 5 insertions(+), 5 deletions(-) [+] |
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--- a/mercurial/setdiscovery.py Mon Oct 27 17:40:32 2014 +0100 +++ b/mercurial/setdiscovery.py Mon Oct 27 17:52:33 2014 +0100 @@ -133,7 +133,7 @@ ui.debug("query 1; heads\n") roundtrips += 1 ownheads = dag.heads() - sample = ownheads + sample = _limitsample(ownheads, initialsamplesize) if remote.local(): # stopgap until we have a proper localpeer that supports batch() srvheadhashes = remote.heads()
--- a/tests/test-setdiscovery.t Mon Oct 27 17:40:32 2014 +0100 +++ b/tests/test-setdiscovery.t Mon Oct 27 17:52:33 2014 +0100 @@ -311,16 +311,16 @@ searching for changes taking quick initial sample searching: 2 queries - query 2; still undecided: 1080, sample size is: 260 + query 2; still undecided: 1240, sample size is: 260 sampling from both directions searching: 3 queries - query 3; still undecided: 820, sample size is: 260 + query 3; still undecided: 980, sample size is: 260 sampling from both directions searching: 4 queries - query 4; still undecided: 560, sample size is: 260 + query 4; still undecided: 720, sample size is: 260 sampling from both directions searching: 5 queries - query 5; still undecided: 300, sample size is: 200 + query 5; still undecided: 460, sample size is: 200 5 total queries common heads: 3ee37d65064a