While attempting to build an Android project on Jenkins, the Gradle build daemon vanished without warning, possibly due to termination or a crash.

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This issue can be caused by a variety of factors, such as insufficient memory allocation, conflicts with other software or plugins, outdated Gradle versions, or corrupted Gradle directories. To resolve this issue, try the following actions:

1. Increase the memory allocation for Gradle by adding the following line to your build.gradle file:

   android {
      ...
      dexOptions {
          javaMaxHeapSize "4g" // or any desired value
      }
   }
   

2. Remove any unnecessary plugins or software that may conflict with Gradle.

3. Update your Gradle version to the latest stable release.

4. Delete the Gradle cache directory by running the following command:

   rm -rf $HOME/.gradle/caches/
   

   This will force Gradle to rebuild its cache and may resolve any corruption issues.

5. Disable the Gradle build daemon by adding the following line to your gradle.properties file:

   org.gradle.daemon=false
   

   This will prevent the daemon from running and may help identify the root cause of the issue.

If the above steps do not resolve the issue, you may need to further investigate the logs and error messages to identify the exact cause of the problem.