Received status code 502 from server: Bad Gateway!! Was Working fine till yesterday.

[tazsid]

• Plugin version: 1.0.3
• Platform: Android
• OS version: 10
• Device manufacturer / model: Redmi 9A
• Flutter info (Flutter 2.5.2 • channel stable • https://github.com/flutter/flutter.git Framework • revision 3595343e20 (9 weeks ago) • 2021-09-30 12:58:18 -0700 Engine • revision 6ac856380f Tools • Dart 2.14.3, Doctor summary (to see all details, run flutter doctor -v): [√] Flutter (Channel stable, 2.5.2, on Microsoft Windows [Version 10.0.19042.1348], locale en-US) [√] Android toolchain - develop for Android devices (Android SDK version 31.0.0) [√] Visual Studio - develop for Windows (Visual Studio Community 2019 16.11.4)
  [√] Android Studio (version 2020.3) [√] Connected device (2 available)

• No issues found!`):

Could not GET 'https://google.bintray.com/exoplayer/com/transistorsoft/tsbackgroundfetch/maven-metadata.xml'. Received status code 502 from server: Bad Gateway

[Tek56]

Same here:

`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 com.transistorsoft:tsbackgroundfetch:+. Required by: project :app > project :background_fetch > Failed to list versions for com.transistorsoft:tsbackgroundfetch. > Unable to load Maven meta-data from https://google.bintray.com/exoplayer/com/transistorsoft/tsbackgroundfetch/maven-metadata.xml. > Could not get resource 'https://google.bintray.com/exoplayer/com/transistorsoft/tsbackgroundfetch/maven-metadata.xml'. > Could not GET 'https://google.bintray.com/exoplayer/com/transistorsoft/tsbackgroundfetch/maven-metadata.xml'. Received status code 502 from server: Bad Gateway`

[christocracy]

Post your android/build.gradle

[Tek56]

android/build.gradle:

buildscript {
    ext.kotlin_version = '1.5.10' // Must use 1.3.0 or higher.
    ext {
        compileSdkVersion   = 30                // or higher
        targetSdkVersion    = 30                // or higher
        appCompatVersion    = "1.0.2"           // or higher
        playServicesLocationVersion = "17.0.0"  // or higher
    }

    repositories {
        google()
        jcenter()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:3.5.0'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
    }
}

allprojects {
    repositories {
        google()
        jcenter()
        maven {
            // [required] flutter_background_geolocation
            url "${project(':flutter_background_geolocation').projectDir}/libs"
        }
        maven {
            // [required] background_fetch
            url "${project(':background_fetch').projectDir}/libs"
        }
    }
}

rootProject.buildDir = '../build'
subprojects {
    project.buildDir = "${rootProject.buildDir}/${project.name}"
}
subprojects {
    project.evaluationDependsOn(':app')
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

[christocracy]

Please learn to syntax highlight code blocks

[Tek56]

Done, sorry @christocracy

[christocracy]

Do you know that the jcenter() repository is deprecated?

Look at the repositories sections of a freshly generated flutter app:

buildscript {
    ext.kotlin_version = '1.3.50'
    repositories {
        google()
        mavenCentral()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:4.1.0'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
    }
}

allprojects {
    repositories {
        google()
        mavenCentral()
    }
}

rootProject.buildDir = '../build'
subprojects {
    project.buildDir = "${rootProject.buildDir}/${project.name}"
    project.evaluationDependsOn(':app')
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

[christocracy]

Look at the android/build.gradle of the /example app here in this repo.

[Tek56]

Yep thanks for that, I took the example of the build gradle. I still have the issue

Could not GET 'https://google.bintray.com/exoplayer/com/transistorsoft/tsbackgroundfetch/maven-metadata.xml'. Received status code 502 from server: Bad Gateway

[christocracy]

I have no idea why your app is attempting to find maven-metadata.xml from google.bintray.com. The maven-metadata.xml exists within the plugin

Post your updated android/build.gradle.

[nhtdev1]

i got the same on this issue

[nhtdev1]

background_fetch: 1.0.3

[Tek56]

This is my updated android/build.gradle

buildscript {
    ext.kotlin_version = '1.5.31'
    ext {
        compileSdkVersion   = 30
        targetSdkVersion    = 30
        supportLibVersion   = "1.3.1"
    }
    repositories {
        google()
        mavenCentral()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:7.0.3'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
    }
}

allprojects {
    repositories {
        google()
        mavenCentral()
        maven {
            // [required] background_fetch
            url "${project(':background_fetch').projectDir}/libs"
        }
    }
}

rootProject.buildDir = '../build'
subprojects {
    project.buildDir = "${rootProject.buildDir}/${project.name}"
}
subprojects {
    project.evaluationDependsOn(':app')
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

[christocracy]

I just generated a fresh flutter app $ flutter create foo. Followed the installation steps here in this repo and the app boots without issue.

[christocracy]

@nhoangthinh See my comment above. I'm not looking at your posted code until you Syntax Highlight it.

[nhtdev1]

buildscript {
    ext.kotlin_version = '1.5.31' // Must use 1.3.0 or higher.
    ext {
        compileSdkVersion   = 30                // or higher
        targetSdkVersion    = 30                // or higher
        appCompatVersion    = "1.3.1"           // or higher
   }

    repositories {
        google()
        mavenCentral()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:7.0.3'
        classpath 'com.google.gms:google-services:4.3.2'
        classpath 'com.google.firebase:firebase-crashlytics-gradle:2.2.1'
    }
}

allprojects {
    repositories {
        google()
        mavenCentral()
        maven {
            // [required] background_fetch
            url "${project(':background_fetch').projectDir}/libs"
        }
    }
}

rootProject.buildDir = '../build'
subprojects {
    project.buildDir = "${rootProject.buildDir}/${project.name}"
}
subprojects {
    project.evaluationDependsOn(':app')
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

[nhtdev1]

@nhoangthinh See my comment above. I'm not looking at your posted code until you Syntax Highlight it. sorry @christocracy , i updated my code

[christocracy]

I have no idea what your problem is. When in doubt, clean your build.

$ cd android
$ ./gradlew clean

[christocracy]

and $ flutter upgrade

[Tek56]

Still the same bug. Like you said, my app is attempting to find maven-metadata.xml from google.bintray.com. instead of searching for the one within the plugin.

I tried:

• Updating Flutter ($ flutter ugprade)
• Cleaning my build ($ ./gradlew clean)

About my app/versions:

• My app is updated post-1.12
• Flutter 2.6.0-12.0.pre.854
• Dart 2.16.0 (build 2.16.0-55.0.dev) • DevTools 2.8.0
• Gradle 6.3

[christocracy]

I suggest you generate yourself a fresh flutter app, follow the setup instructions and verify the plugin builds fine.

[sohubill]

I got the same problem from yesterday

[christocracy]

Create for me a freshly generated flutter app which reproduces this then share that repo with me.

[DiepEsc]

There changes in android/build.gradle seen to work for me.

 buildscript {
     ext.kotlin_version = '1.4.0' // Must use 1.3.0 or higher.
     ext {
         compileSdkVersion   = 30                // or higher
         targetSdkVersion    = 30                // or higher
         appCompatVersion    = "1.2.0"           // or higher
    }
 
     repositories {
         google()
-        jcenter()
+        mavenCentral()
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:4.0.1'
+        classpath 'com.android.tools.build:gradle:4.2.2'
         classpath 'com.google.gms:google-services:4.3.2'
         classpath 'com.google.firebase:firebase-crashlytics-gradle:2.2.1'
     }
 }
 
 allprojects {
     repositories {
         google()
-        jcenter()
         maven {
             // [required] background_fetch
             url "${project(':background_fetch').projectDir}/libs"
         }
+        mavenCentral {
+            content {
+                excludeGroupByRegex "com\\.google\\.android\\.gms"
+            }
+        }
 
     }
 }

[asmodeoux]

The issue is back today, Maven is seeing this mention in build.gradle: implementation(group: 'com.transistorsoft', name:'tsbackgroundfetch', version: '+')

and tries to get it from Bintray repository, but since bintray repository is sunset since this December it fails to get it. It's a good question why is it trying to get it from a remote repo and not local file inside plugin, but we have to force it using the local one somehow.

[asmodeoux]

Replacing the + version with an actual version name fixed the problem for me

implementation(group: 'com.transistorsoft', name:'tsbackgroundfetch', version: '+') —> implementation(group: 'com.transistorsoft', name:'tsbackgroundfetch', version: '0.5.0')

Also, the order of repositories matters, make sure you put

        maven {
            url './libs'
        }

above google() and mavenCentral()

[G-Luz]

My problem it's same. My debug showing this problem today. How solve this error?

[Tek56]

Thanks a lot @asmodeoux. @G-Luz, in app/build.gradle, add the following line: implementation(group: 'com.transistorsoft', name:'tsbackgroundfetch', version: '0.5.0') in build.gradle, add the following lines BEFORE google() and mavenCentral(): maven { url './libs' }

[G-Luz]

Thanks a lot @asmodeoux. @G-Luz, in app/build.gradle, add the following line: implementation(group: 'com.transistorsoft', name:'tsbackgroundfetch', version: '0.5.0') in build.gradle, add the following lines BEFORE google() and mavenCentral(): maven { url './libs' }

Thank you for reply. I continue received error, but it's a new error:

My app/build.gradle:

dependencies {
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'androidx.test:runner:1.2.0'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
    implementation(group: 'com.transistorsoft', name:'tsbackgroundfetch', version: '0.5.0')
}

apply plugin: 'com.google.gms.google-services'

My android/build.gradle:

buildscript {

    ext.kotlin_version = '1.3.0' // Must use 1.3.0 or higher.
    ext {
        compileSdkVersion = 29                // or higher
        targetSdkVersion = 29                // or higher
        appCompatVersion = "1.0.2"           // or higher
        playServicesLocationVersion = "17.0.0"  // or higher
    }

    repositories {
        maven { url './libs' }
        google()
        jcenter()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:3.5.0'
        classpath 'com.google.gms:google-services:4.3.2'
    }
}

allprojects {
    repositories {
        maven { url './libs' }
        google()
        jcenter()
    }
}

[christocracy]

@G-Luz Look at the build.gradle from a freshly generated Flutter app that I posted above. Notice there is no jcenter.

You should not see jcenter at all. jcenter is DEAD

[G-Luz]

Yes jcenter is DEAD, sorry. I send my build.gradle before make new changes (change to mavenCentral).

My output after change to mavenCentral():

My android/build.gradle:

buildscript {

    ext.kotlin_version = '1.3.0' // Must use 1.3.0 or higher.
    ext {
        compileSdkVersion = 29                // or higher
        targetSdkVersion = 29                // or higher
        appCompatVersion = "1.0.2"           // or higher
        playServicesLocationVersion = "17.0.0"  // or higher
    }

    repositories {
        maven { url './libs' }
        google()
        mavenCentral()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:3.5.0'
        classpath 'com.google.gms:google-services:4.3.2'
    }
}

allprojects {
    repositories {
        maven { url './libs' }
        google()
        mavenCentral()
    }
}