[firebase_storage]: The operation couldn’t be completed. Message too long

[feinstein]

Description

I am using an iPhone 16 Pro Simulator running iOS 18.2, and when I try to upload a picture in Firebase Storage, I am getting this error:

[firebase_storage/unknown] The operation couldn’t be completed. Message too long

I get this while running the Firebase SDK for Flutter, and I originally opened an issue there about it.

As you can see in the thread, our suspicion is that some iPhone devices/OS has a smaller datagram size and if you try to create a bigger data gram, you get this error. The iOS Vertex AI library appears to have this issue as well (as you can also see at the issue I linked), but they have another method there that seems to go around this limitation, whereas Firebase Storage doesn't have one, so the Flutter SDK can't use any workarounds and the iOS native library should be the one fixed.

Reproducing the issue

Follow the steps in the issue linked above.

Firebase SDK Version

11.6.0

Xcode Version

16.2

Installation Method

CocoaPods

Firebase Product(s)

Storage

Targeted Platforms

iOS

Relevant Log Output

[firebase_storage/unknown] The operation couldn’t be completed. Message too long

If using Swift Package Manager, the project's Package.resolved

Expand Package.resolved snippet

Replace this line with the contents of your Package.resolved.

If using CocoaPods, the project's Podfile.lock

Expand Podfile.lock snippet

Replace this line with the contents of your Podfile.lock!

[google-oss-bot]

I couldn't figure out how to label this issue, so I've labeled it for a human to triage. Hang tight.

[feinstein]

This is weird... I didn't change my code at all, I started to play with the swift code and got something working, then I reverted everything back and tried to use my flutter code and now it works, so I will close this, but it worries me to see an intermittent behaviour like this.

[tranvansang]

I have the same issue, can reproduce it frequently in iOS simulator, but it is difficult to make a simple reproduction. I'll try to narrow down the error and check if there is any useful information

  firebase_core: ^3.11.0
  cloud_firestore: ^5.6.3
  firebase_storage: ^12.4.2

there were a bunch of this error messages.

flutter: [firebase_storage/unknown] The operation couldn’t be completed. Message too long
[ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: [firebase_storage/unknown] The operation couldn’t be completed. Message too long
[ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: [firebase_storage/unknown] The operation couldn’t be completed. Message too long

======== Exception caught by Flutter framework =====================================================
The following FirebaseException was thrown:
[firebase_storage/unknown] The operation couldn’t be completed. Message too long

When the exception was thrown, this was the stack: 
====================================================================================================
[ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: [firebase_storage/unknown] The operation couldn’t be completed. Message too long

======== Exception caught by Flutter framework =====================================================
The following FirebaseException was thrown:
[firebase_storage/unknown] The operation couldn’t be completed. Message too long

When the exception was thrown, this was the stack: 
====================================================================================================

======== Exception caught by Flutter framework =====================================================
The following FirebaseException was thrown:
[firebase_storage/unknown] The operation couldn’t be completed. Message too long

When the exception was thrown, this was the stack: 
====================================================================================================

======== Exception caught by Flutter framework =====================================================
The following FirebaseException was thrown:
[firebase_storage/unknown] The operation couldn’t be completed. Message too long

When the exception was thrown, this was the stack: 
====================================================================================================
[ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: [firebase_storage/unknown] The operation couldn’t be completed. Message too long

========[ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: [firebase_storage/unknown] The operation couldn’t be completed. Message too long
 Exception caught by Flutter framework =====================================================
The following FirebaseException was thrown:
[firebase_storage/unknown] The operation couldn’t be completed. Message too long

When the exception was thrown, this was the stack: 
====================================================================================================

======== Exception caught by Flutter framework =====================================================
The following FirebaseException was thrown:
[firebase_storage/unknown] The operation couldn’t be completed. Message too long

When the exception was thrown, this was the stack: 
====================================================================================================

======== Exception caught by Flutter framework =====================================================
The following FirebaseException was thrown:
[firebase_storage/unknown] The operation couldn’t be completed. Message too long

When the exception was thrown, this was the stack: 
====================================================================================================

======== Exception caught by Flutter framework =====================================================
The following FirebaseException was thrown:
[firebase_storage/unknown] The operation couldn’t be completed. Message too long

When the exception was thrown, this was the stack: 
===================================================================================================