Error loading storage: FormatException due to corrupted serialized state

[felixwoestmann]

Hello,
we ran into the issue that the serialized state is broken and can't be deserialized. When initializing the Client we are now catching the error, but would like to have an option to delete all stored state to remove the error. Currently it occurs every time when starting the application.

Is there a way to do so?

The following is the data which is not valid Json and therefore couldn't be deserialized. It was from the file analytics-flutter-queue_flushing_plugin.json.

{"queue":[{"anonymousId":"cfe0edd5-2348-47f0-a1e4-6a3ecedf07b9","messageId":"0d9de8ea-c709-4e96-aea4-b66bc51db74a","userId":null,"timestamp":"2024-04-30T13:22:09.965928","context":{"app":{"build":"1","name":"App Name","namespace":"com.app.name","version":"3.40.0"},"device":{"manufacturer":"Google","model":"sdk_gphone64_arm64","name":"emu64a","type":"android"},"library":{"name":"analytics-flutter","version":"1.0.0"},"locale":"en-US","network":{"cellular":false,"wifi":true},"os":{"name":"Android","version":"14"},"screen":{"height":1270,"width":720,"density":2.0},"timezone":"Europe/Ljubljana","instanceId":"5e8546bb-bba3-4ff7-b3b1-f5ab3d42d7a6","traits":{}},"integrations":null,"_metadata":{"bundled":[],"unbundled":["Actions Amplitude"],"bundledIds":[]},"event":"responseReceived","properties":{"screen":"LoginRoute","value":"Success"},"type":"track"},{"anonymousId":"cfe0edd5-2348-47f0-a1e4-6a3ecedf07b9","messageId":"bf9ead8c-29df-4fd2-9b02-71dee4ba5e55","userId":null,"timestamp":"2024-04-30T13:22:09.983209","context":{"app":{"build":"1","name":"App Name","namespace":"com.app.name","version":"3.40.0"},"device":{"manufacturer":"Google","model":"sdk_gphone64_arm64","name":"emu64a","type":"android"},"library":{"name":"analytics-flutter","version":"1.0.0"},"locale":"en-US","network":{"cellular":false,"wifi":true},"os":{"name":"Android","version":"14"},"screen":{"height":1270,"width":720,"density":2.0},"timezone":"Europe/Ljubljana","instanceId":"5e8546bb-bba3-4ff7-b3b1-f5ab3d42d7a6","traits":{}},"integrations":null,"_metadata":{"bundled":[],"unbundled":["Actions Amplitude"],"bundledIds":[]},"name":"/select-hub","properties":{},"type":"screen"},{"anonymousId":"cfe0edd5-2348-47f0-a1e4-6a3ecedf07b9","messageId":"4fda9727-48ac-40cb-856b-c6290526b02b","userId":null,"timestamp":"2024-04-30T13:22:13.209824","context":{"app":{"build":"1","name":"App Name","namespace":"com.app.name","version":"3.40.0"},"device":{"manufacturer":"Google","model":"sdk_gphone64_arm64","name":"emu64a","type":"android"},"library":{"name":"analytics-flutter","version":"1.0.0"},"locale":"en-US","network":{"cellular":false,"wifi":true},"os":{"name":"Android","version":"14"},"screen":{"height":1270,"width":720,"density":2.0},"timezone":"Europe/Ljubljana","instanceId":"5e8546bb-bba3-4ff7-b3b1-f5ab3d42d7a6","traits":{}},"integrations":null,"_metadata":{"bundled":[],"unbundled":["Actions Amplitude"],"bundledIds":[]},"traits":{"hubId":"de-hh-pauli"},"type":"identify"}]}

[edsonjab]

hi @felixwoestmann thank you for your report, we start looking into this.

[QuirijnGB]

We're experiencing the same

[edsonjab]

hi @felixwoestmann @QuirijnGB could you help me to provide an example how you configure your project? and your Analytics configuration, please, I can't replicate the issue; all works as expected.

[chrisk1123]

We're experiencing the same

[WuChuanRong]

We're experiencing the same

Future _initial() async {
if (_initDone) return;
_initDone = true;

final segmentKey = AppConfig.current.segmentKey;

final configuration = Configuration(
  segmentKey,
  trackApplicationLifecycleEvents: false,
  flushPolicies: [
    StartupFlushPolicy(),
    TimerFlushPolicy(3000),
    CountFlushPolicy(10),
  ]
);
analytics = createClient(configuration);

}

[QuirijnGB]

Config

      var segmentClient = createClient(
        Configuration(
          [KEY],
          trackApplicationLifecycleEvents: true,
          trackDeeplinks: true,
        ),
      );

Some errors in Sentry

Error loading storage: FormatException: Unexpected character (at character 13)
{"queue":[]}anonymousId":"[REDACTED]","messageId"...

FormatException: Unexpected character (at character 621)
...tal","last_name":"[REDACTED]","subscription_plan_name":"Roamer"}}":"Roamer"}}

I actually haven't been able to reliably reproduce it.
Is there a way we can reliably trigger a write to cache?

[cerealexx]

same here... it's really annoying

[edsonjab]

Hi @cerealexx , could you help us to explain how replicate the issue, please?
flutter version, segment version, configuration file of segmentClient