Multiple crashes in Sentry related to SDK & fetching flags

[felislynx-silae]

Describe the bug
I noticed multiple crash reports on Sentry from LaunchDarkly SDK:
Exception when fetching flags - java.net.UnknownHostException: Unable to resolve host "clientsdk.launchdarkly.com": No address associated with hostname

To reproduce
Unknown

Expected behavior
SDK should handle all exceptions internally and not cause application to crash

SDK version
5.9.1

Language version, developer tools
Kotlin 2.2.20

OS/platform
Android 12, Android 13, Android 14 and Android 15

Additional context
It happens on random, can't reproduce by turning off internet.
Status listener is set:

ldClient?.registerStatusListener(
                object : LDStatusListener {
                    override fun onConnectionModeChanged(connectionInformation: ConnectionInformation?) {
                        Logger.i("Mode changed: $connectionInformation", "LaunchDarkly")
                    }

                    override fun onInternalFailure(error: LDFailure?) {
                        Logger.i("Error: $error", "LaunchDarkly")
                    }
                },
            )

Code that fetches flag value:

 ldClient?.registerFeatureFlagListener(
            "CustomFlag",
            {
                val newValue = ldClient?.boolVariation("CustomFlag", false)
                Logger.i(
                    "UPDATE: Flag CustomFlag:false:Fetched $newValue",
                    "LaunchDarkly",
                )
            },
        )
        val newValue = ldClient?.boolVariation("CustomFlag", false)
        Logger.i("CURRENT Flag CustomFlag:false:Fetched $newValue", "LaunchDarkly")

[tanderson-ld]

Hi @felislynx-silae , thank you for reaching out. This exception is captured and logged in the SDK code, so it shouldn't be bubbling up. The SDK will internally backoff/retry when it encounters network resolution issues.

            call.enqueue(new okhttp3.Callback() {
                @Override
                public void onFailure(@NonNull Call call, @NonNull IOException e) {
                    LDUtil.logExceptionAtErrorLevel(logger, e, "Exception when fetching flags");
                    callback.onError(new LDFailure("Exception while fetching flags", e, LDFailure.FailureType.NETWORK_FAILURE));
                }

I just want to double check, what does Sentry say that indicates this is leading to a crash? Is there a stack trace included with the Sentry report?

[felislynx-silae]

@tanderson-ld
Here are screenshots from sentry:

[tanderson-ld]

I think that is just an error with a stack trace since it looks like it goes through the LDLogger to Timber and Timber is getting the stack trace from the thread to include with the log.

The presence of a stack does not necessarily imply the exception/error was uncaught.

Do you have customer reports of a crash occurring or do the native Android Play store crash monitoring tools see a corresponding crash?

[felislynx-silae]

@tanderson-ld
Only QA reports with attached sentry report. Application is not on play store yet. I'll try to fetch more data about that.