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Re: (ITS#9037) observing crash in mdb_cursor_put()
> On 1. Aug 2019, at 19:47, Howard Chu <hyc@symas.com> wrote:
>=20
> vporof@mozilla.com wrote:
>> Hey folks.
>>=20
>> =3D46rom Myk=3DE2=3D80=3D99s investigations in the previous followup, =
it seems =3D
>> that the suggested changes to `mdb_cursor_init` to avoid using an =3D
>> invalid DBI might not be solving the actual issue, given the =
behaviour =3D
>> of `mdb_page_search`.
>=20
> Agreed, that assert that I suggested isn't catching what we want.
FWIW, here's my findings when attempting to look into what was happening =
with regards to that test case: =
https://gist.github.com/victorporof/d1f98b8a52f79c7ff99f361d3a2adc3e
It's unclear how much overlap there is with the previous findings, and =
whether or not calling `mdb_put` should assert with the DBI previously =
opened via `mdb_dbi_open` with MDB_CREATE. Let me know if what I'm =
observing here is expected.
>=20
>> It=3DE2=3D80=3D99s also causing the seemingly correct test program to =
assert =3D
>> when it wasn=3DE2=3D80=3D99t before. It=3DE2=3D80=3D99s unclear =
whether this should =3D
>> be the case or not, perhaps Howard can confirm the expected =
behaviour.
>>=20
>> In any case, we=3DE2=3D80=3D99re wondering if there=3DE2=3D80=3D99s =
been any other =3D
>> progress, or if someone managed to reproduce this issue? Shipping new =
=3D
>> features built on top of LMDB in Firefox is currently blocked due to =
=3D
>> these failures, so any additional info would be helpful.
>=20
> Sorry, still not seeing this over here. What else do you know about =
the
> systems where this is occurring? RAM size, storage on HDD / SSD / USB =
?
Here's everything we know about: =
https://crash-stats.mozilla.org/report/index/5d77bd19-41ce-459f-9c1c-7f9fb=
0190324 See the "details" and "telemetry environment" sections for a =
breakdown.
Victor
>=20
> --=20
> -- Howard Chu
> CTO, Symas Corp. http://www.symas.com
> Director, Highland Sun http://highlandsun.com/hyc/
> Chief Architect, OpenLDAP http://www.openldap.org/project/