Gradle 4.6 clean build hangs, all threads WAITING

bamarch · April 6, 2018, 9:40am

I would be really grateful is someone can help me figure out

a) is this a Gradle bug?
b) if not, what next steps of troubleshooting would you suggest…?

On Gradle 4.6 I am seeing an issue where my ‘clean build’ will hang indefinitely (but only sometimes).

I originally saw this issue in 4.0.2.

I upgraded to 4.6 after reading Composite build hangs after upgrade to Gradle 4.0 but I still experience the same issue.

This makes me think it will be related to my project, tests or build scripts. (I was on 4.0.2 a long time without seeing this issue).

Looking at the thread dumps, all build operations threads are WAITING.

I have attached:

the thread dump from GradleDaemon (whilst build is hanging)
analysis of the thread dump (output from http://mchr3k.github.io/javathreaddumpanalyser/)
the daemon log for the build, after it was aborted

gist.github.com

https://gist.github.com/bamarch/53c4334eb28ab3ce8492d2473cf77d00

GradleDaemon_threadDump.out

2018-04-05 12:18:57
Full thread dump Java HotSpot(TM) 64-Bit Server VM (25.144-b01 mixed mode):

"Attach Listener" #733 daemon prio=9 os_prio=0 tid=0x00007faec8001000 nid=0x2102 waiting on condition [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

   Locked ownable synchronizers:
        - None

"/0:0:0:0:0:0:0:1:36148 to /0:0:0:0:0:0:0:1:43732 workers Thread 4" #682 prio=5 os_prio=0 tid=0x00007fac18064800 nid=0x152c runnable [0x00007fad1ccbf000]

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GradleDaemon_threadDumpAnalysis.txt

Total threads: 129

34 threads with trace:
States: {RUNNABLE=34}
Names:
 - "Attach Listener"
 - "C1 CompilerThread10"
 - "C1 CompilerThread11"
 - "C1 CompilerThread8"
 - "C1 CompilerThread9"

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aborted_build_daemon.out.log

11:36:13.675 [DEBUG] [org.gradle.launcher.daemon.bootstrap.DaemonMain] Assuming the daemon was started with following jvm opts: [-server, -XX:MaxMetaspaceSize
=384m, -XX:+HeapDumpOnOutOfMemoryError, -XX:+AggressiveOpts, -Xms768m, -Xmx6192m, -Dfile.encoding=UTF-8, -Djavax.net.ssl.trustStore=/var/lib/jenkins/.keystore
/cacerts, -Djavax.net.ssl.trustStorePassword=********, -Duser.country=DE, -Duser.language=de, -Duser.variant]
11:36:13.807 [INFO] [org.gradle.launcher.daemon.server.Daemon] start() called on daemon - DefaultDaemonContext[uid=79c33b41-4e60-49e4-bfe6-e895235b3d84,javaHo
me=/usr/lib/jvm/java-8-oracle,daemonRegistryDir=/var/lib/jenkins/.gradle/daemon,pid=28301,idleTimeout=120000,daemonOpts=-server,-XX:MaxMetaspaceSize=384m,-XX:
+HeapDumpOnOutOfMemoryError,-XX:+AggressiveOpts,-Xms768m,-Xmx6192m,-Dfile.encoding=UTF-8,-Djavax.net.ssl.trustStore=/var/lib/jenkins/.keystore/cacerts,-Djavax
.net.ssl.trustStorePassword=*********,-Duser.country=DE,-Duser.language=de,-Duser.variant]
[truncated]
:webapps:app-war:src:main:js:build (Thread[Task worker for ':' Thread 6,5,main]) started.
:webapps:app-war:src:main:js:build

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Setup:

Gradle version: 4.6

gradle.properties:

org.gradle.jvmargs=-server -Xms768m -Xmx6192m -XX:MaxMetaspaceSize=384m -XX:+HeapDumpOnOutOfMemoryError -Dfile.encoding=UTF-8 -XX:+AggressiveOpts
org.gradle.parallel=true
org.gradle.daemon=true
org.gradle.configureondemand=true