Flutter - Build failed with an exception

Question

When I launched my app, I got this error message. I did not make any changes since last run, when everything was fine. Does anybody know how to solve this? Thank you.

FAILURE: Build failed with an exception.

What went wrong: Could not determine the dependencies of task ':app:processDebugResources'.

Could not resolve all task dependencies for configuration ':app:debugRuntimeClasspath'. Could not resolve io.grpc:grpc-core:[1.28.0]. Required by: project :app > project :cloud_firestore > com.google.firebase:firebase-firestore:22.1.2 > io.grpc:grpc-android:1.28.0 project :app > project :cloud_firestore > com.google.firebase:firebase-firestore:22.1.2 > io.grpc:grpc-okhttp:1.28.0 > Failed to list versions for io.grpc:grpc-core. > Unable to load Maven meta-data from https://google.bintray.com/exoplayer/io/grpc/grpc-core/maven-metadata.xml. > Could not get resource 'https://google.bintray.com/exoplayer/io/grpc/grpc-core/maven-metadata.xml'. > Could not GET 'https://google.bintray.com/exoplayer/io/grpc/grpc-core/maven-metadata.xml'. Received status code 502 from server: Bad Gateway

Try: Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
Get more help at https://help.gradle.org

BUILD FAILED in 6s Exception: Gradle task assembleDebug failed with exit code 1

Same issue here too. Build was working fine in the morning, but a few hours later I get this "502 Bad Gateway" error. Did you solve it? — Magnus
– Magnus, Commented Nov 30, 2021 at 16:09
You can adopt this answer stackoverflow.com/a/70360614/12052309 You have to strictly set version for io.grpc:grpc-core — Sergey Salnikov
– Sergey Salnikov, Commented Dec 15, 2021 at 8:53

Leonardo Castro · Accepted Answer · 2021-11-30 15:39:05Z

4

The solution I founded was upgrade all my packages.

flutter pub upgrade --major-versions

After treat all the issues and problems.

Upgrade the kotlin version too.

from ext.kotlin_version = '1.3.50' to ext.kotlin_version = '1.4.32'

Or the latest Kotlin version.

Try to run your project again.

answered Nov 30, 2021 at 15:39

Leonardo Castro

563 bronze badges

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2 Comments

directed laugh Over a year ago

The solution above worked for me. My error follows Could not resolve org.jetbrains.kotlin:kotlin-stdlib-jdk7:+ and ends with the same "exoplayer" error. There are at least 2 other dupes. I ran flutter clean then flutter pub upgrade --major-versions, and had to fix other broken deps afterwards, but I'm out of this quagmire. THANK YOU

user17550050 Over a year ago

Thanks Leonardo. Your answer helped a lot. I had to also upgrade gradle according to this advice github.com/ivpusic/react-native-image-crop-picker/issues/1406

Sergey Salnikov · Accepted Answer · 2021-12-15 12:39:00Z

1

Basic problem that version of io.grpc:grpc-core:[1.28.0] is not specified strictly and gradle have to find possible versions but google.bintray.com is down - no version listing available

Find what version is - this [1.28.0] mean it has versions range Gradle Declaring Versions and Ranges
The [ and ] symbols indicate an inclusive bound with only one version - so consider take exactly 1.28.0
Constrain your transitive dependency with maximum possible version 1.28.0

Edit your project app/build.gradle:

dependencies {
  ...
  constraints {
    implementation('io.grpc:grpc-core') {
        version {
            strictly '1.28.0'
        }
    }
  }
}

answered Dec 15, 2021 at 12:39

Sergey Salnikov

1,79110 silver badges18 bronze badges

Comments

Theodore MCA · Accepted Answer · 2022-05-16 10:35:46Z

1

Follow these three steps

1. flutter pub cache repair.

2. flutter Clean.

Finally and the most important

3. Modify the build.gradle file as below change jcenter() to mavenCentral() everywhare

Before

 repositories {
        google()
        jcenter()
 }

After

 repositories {
        google()
        mavenCentral()
 }

Good luck.

answered May 16, 2022 at 10:35

Theodore MCA

1,20815 silver badges16 bronze badges

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