1592232 - Fenix crashes loading libglean_ffi.so on old Android because `stderr` can't be found

Status: RESOLVED FIXED

(Data Platform and Tools :: Glean: SDK, defect, P1)

Description

[Jan-Erik Rediger [:janerik] (Away 2026-04-29 - 2026-05-01]

See https://sentry.prod.mozaws.net/operations/fenix-nightly/issues/6530359/?query=is:unresolved%20glean

UnsatisfiedLinkError

Unable to load library 'glean_ffi':
dlopen failed: cannot locate symbol "stderr" referenced by "libglean_ffi.so"...
dlopen failed: cannot locate symbol "stderr" referenced by "libglean_ffi.so"...
dlopen failed: cannot locate symbol "stderr" referenced by "/data/app/org.mozilla.fenix.nightly-1/lib/arm64/libglean_ffi.so"...
Native library (android-aarch64/libglean_ffi.so) not found in resource path (.)

    com.sun.jna.NativeLibrary in loadLibrary at line 69

Comment 1

[Jan-Erik Rediger [:janerik] (Away 2026-04-29 - 2026-05-01]

I tracked this down by reducing our source code bit by bit.
Turns out: lmdb (as compiled by lmdb-rkv-sys) is the culprit by writing to stderr on asserts: https://github.com/mozilla/lmdb/blob/b7df2cac50fb41e8bd16aab4cc5fd167be9e032a/libraries/liblmdb/mdb.c#L1532-L1540

This can be fixed by compiling with NDEBUG

Comment 2

[Jan-Erik Rediger [:janerik] (Away 2026-04-29 - 2026-05-01]

Attachment: GitHub Pull Request

This compiles lmdb through lmdb-rkv-sys with NDEBUG

Comment 3

[Jan-Erik Rediger [:janerik] (Away 2026-04-29 - 2026-05-01]

Attachment: Glean PR

We ended up fixing this in our build environment for now