1968018 - startup Crash in [@ java.lang.NoClassDefFoundError: at com.sun.jna.Structure.validateFields(Structure.java)]

Status: RESOLVED FIXED

(Focus :: General, defect)

Description

[Sebastian Hengst [:aryx] (needinfo me if it's about an intermittent or backout)]

186 crashes from 126 installs of Focus 139.0 on Android 5 and 6 (API versions 21-23).

Crash report: https://crash-stats.mozilla.org/report/index/5104190d-ee64-4457-8d7e-6bd270250522

Top 10 frames:

0  com.sun.jna.Structure  validateFields  Structure.java:48
1  com.sun.jna.Structure  <init>  Structure.java:15
2  com.sun.jna.Structure  <init>  Structure.java:6
3  com.sun.jna.Structure  <init>  Structure.java:3
4  com.sun.jna.Structure  <init>  Structure.java:1
5  mozilla.appservices.rust_log_forwarder.UniffiRustCallStatus  <init>  rust_log_forwarder.kt:1
6  mozilla.appservices.rust_log_forwarder.Rust_log_forwarderKt  setLogger  rust_log_forwarder.kt:5
7  org.mozilla.focus.FocusApplication  onCreate  FocusApplication.kt:54
8  android.app.Instrumentation  callApplicationOnCreate  Instrumentation.java:1014
9  android.app.ActivityThread  handleBindApplication  ActivityThread.java:4762

Comment 1

[Ryan VanderMeulen [:RyanVM]]

Hi Ben, any thoughts on this?

Comment 2

[Ben Dean-Kawamura [:bdk]]

I think it might be this one

• 139 upgraded JNA from 5.6.0 to 5.17.0 (PR)
• That issue mentions they dropped support for JDK 6 and 7 in 5.14.0. Are older android versions on older JDKs? I'm not sure how that works.

Comment 3

[Ben Dean-Kawamura [:bdk]]

A comment in that issue says "Android has natively supported Java 8 Lambda since Nougat (API 24, Android 7.0).", which seems to line up with this.

Comment 4

[Ryan VanderMeulen [:RyanVM]]

Ugh, I don't think we can address this in time for 139.0 at this point. AFAICT, our only option is going to be to revert the JNA bump from Glean/AppServices and create dot releases that we can then backport to v139. And we'll be stuck on JNA 5.14.0 until we eventually bump our minimum Android version to 7 or higher.

Comment 5

[Ryan VanderMeulen [:RyanVM]]

What I don't understand is why only Focus is hitting this crash.

Comment 6

[BMO Github Automation]

Attachment: [mozilla/glean] Bug 1968018 - Revert JNA 5.17.0 update (#3136)

Comment 7

[BugBot [:suhaib / :marco/ :calixte]]

The bug is marked as tracked for firefox139 (beta) and tracked for firefox140 (nightly). However, the bug still isn't assigned.

:bclark, could you please find an assignee for this tracked bug? If you disagree with the tracking decision, please talk with the release managers.

For more information, please visit BugBot documentation.

Comment 8

[Jan-Erik Rediger [:janerik]]

badboy merged PR [mozilla/glean]: Bug 1968018 - Revert JNA 5.17.0 update (#3136) in 12cb6a5.

Comment 9

[Ryan VanderMeulen [:RyanVM]]

Focus 139.0rc3 (build ID #20250523173407) has been rolling out to the Open Testing track since yesterday and so far there have been no reports from builds newer than 20250519150218. It's looking very promising that the JNA revert resolved this but we can wait another day or two for wider rollout before closing the bug out.

Comment 10

[Ryan VanderMeulen [:RyanVM]]

Fixed by the blocking bugs.