Gradle build stuck

Gradle build stuck, keep on running but never ending

Here are some key error in console logs

• Waiting to acquire shared lock on daemon addresses registry
• Daemon stuck
• Gradle build stuck at “Waiting to acquire shared lock on daemon addresses registry.”

Here are sample logs from Gradle console

22:18:32.549 [DEBUG] [org.gradle.cache.internal.DefaultFileLockManager] Waiting to acquire shared lock on daemon addresses registry.
22:18:32.549 [DEBUG] [org.gradle.cache.internal.DefaultFileLockManager] Lock acquired on daemon addresses registry.
22:18:32.549 [DEBUG] [org.gradle.cache.internal.DefaultFileLockManager] Releasing lock on daemon addresses registry.
22:18:32.550 [DEBUG] [org.gradle.cache.internal.DefaultFileLockManager] Waiting to acquire shared lock on daemon addresses registry.
22:18:32.550 [DEBUG] [org.gradle.cache.internal.DefaultFileLockManager] Lock acquired on daemon addresses registry.
22:18:32.550 [DEBUG] [org.gradle.cache.internal.DefaultFileLockManager] Releasing lock on daemon addresses registry.
22:18:33.386 [DEBUG] [org.gradle.process.internal.health.memory.MemoryManager] Emitting OS memory status event {Total: 34359738368, Free: 14353453056}
22:18:33.386 [DEBUG] [org.gradle.launcher.daemon.server.health.LowMemoryDaemonExpirationStrategy] Received memory status update: {Total: 34359738368, Free: 14353453056}
22:18:33.386 [DEBUG] [org.gradle.process.internal.health.memory.MemoryManager] Emitting JVM memory status event {Maximum: 1908932608, Committed: 1227358208}

Investigation

List process

To see what happending behind the scene, firstly run jps and get process IDs for Gradle , e.g. output as

~|⇒  jps
8304 
72803 KotlinCompileDaemon
72501 GradleDaemon
73700 GradleDaemon
74823 GradleWrapperMain
75366 Jps
74603 KotlinCompileDaemon
636 
71455 GradleDaemon
74846 ApplicationKt

Show details of Gradle Daemon

To know more about stack trace for Gralde, use following command

jstack 72501

There are lots of waiting process, which indicate they are waiting for further signal to go ahead.

Solution

Then it turn out there is gradle argument debug in grade command list beow:

./gradlew bootRun --debug-jvm --stacktrace

So you should open debug to attach the process. i.e. go to Run and click Attach to process and select your assigned point, then Gradle process would resume and continue to run.

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