Tests in milestone 5 or 6 hang forever

DavidEllis · November 24, 2011, 9:59am

when I switch to milestone 5 or 6 from milestone 3 the tests hang for ever. They work fine in milestone 3.

luke_daley · November 24, 2011, 11:10am

David,

We can’t do anything without some more information. We really need a sample app that has this problem that we can run.

DavidEllis · November 24, 2011, 11:30am

Thanks Luke - I am trying to track it down.

We have stripped it down to use only the java plugin.

It appears to work with --debug enabled.

I’ll try to get a sample app with the problem.

Thanks again David

luke_daley · November 24, 2011, 11:34am

Great, thanks.

DavidEllis · November 24, 2011, 2:27pm

FYI:

When we fork a JVM per test the tests execute, we have also tried it forking every 100 tests and it works, every 2048 does not…

There are around 6k tests, they are all unit tests.

Has anything changed in the way JUnit is invoked to explain this behaviour?

Still trying to produce a sample.

DavidEllis · November 24, 2011, 4:26pm

I have a sample that reproduces the problem. Basically if you run a lot of tests (somewhere between 1000 and 10000), running gradle test will hang forever.

I wrote a perl script to generate the tests:

use File::Path qw(mkpath);

my $package = “mars”;

my $path=“src/test/java/”.$package;

mkpath $path;

for($i=0;$i<10000;$i++) {

open ( F, “>”.$path.“/Spaceman”.$i.“Test.java”) or die $!;

print F “package “.$package.”;\n public class Spaceman”.$i.“Test \n{\n @org.junit.Test public void gradleRunsMe() {System.out.println("HI");}\n}”;

close(F);

}

and then I used the following build.gradle: >

apply plugin: ‘java’

dependencies {

testCompile (group: ‘junit’,name: ‘junit-dep’,version: ‘4.10’) {

exclude module: ‘hamcrest-core’

}

repositories {

mavenCentral()

}

and then I run > % gradle test >

luke_daley · November 24, 2011, 5:16pm

Hi David,

Thanks for going to the trouble to create that. I can indeed reproduce it here with that script. We’ll take a look and let you know.

eric_nelson76 · December 19, 2011, 10:35pm

I recently switched to milestone 6 and started getting this error when running tests in one of my modules:

org&#46;gradle&#46;api&#46;internal&#46;tasks&#46;testing&#46;results&#46;TestListenerAdapter$UnableToFindTest: Unable to notify listener with output event: org&#46;gradle&#46;api&#46;internal&#46;tasks&#46;testing&#46;DefaultTestOutputEvent@4b7504fb&#46; I couldn't find test with id: 1&#46;92&#46; This might be a bug, please report it&#46;

I’m not even sure which test it’s failing on because that’s the only information I get, otherwise I’d post the test example.

This was not a problem in milestone 3 with the exact same tests and dependencies. I’m using Java JDK 1.6.0_29-b11 on a Linux Ubuntu machine. Any help would be greatly appreciated as it’s killing out CI machine, which has been updated to milestone 6. Thanks!

This reply was created from a merged topic originally titled Error running tests in milestone 6.

Peter_Niederwieser · December 19, 2011, 10:39pm

Turns out that this issue might be unrelated to the above, shouldn’t have merged them. Sorry for that.

eric_nelson76 · December 19, 2011, 10:42pm

Can you un-merge this thread so I can get it back in the main forum? Thanks Peter.

Peter_Niederwieser · December 19, 2011, 10:42pm

Most likely this isn’t a problem with a particular test but with Gradle’s testing infrastructure. It would be very valuable if you could provide a build that allows to reproduce the problem. What are your test settings? Do you run tests in parallel?

Peter_Niederwieser · December 19, 2011, 10:45pm

Unfortunately un-merging is not supported. What I can offer is that you create another topic and I’ll delete the merged post.

JordanZimmerman · April 4, 2012, 6:59pm

Full thread dump Java HotSpot™ 64-Bit Server VM (20.6-b01-413 mixed mode):

“Incoming Connection [eaf47fc0-9c93-40b3-9293-e0cc845a4f07 port:59538, addresses:[/0:0:0:0:0:0:0:1, /127.0.0.1]]:0 outgoing org.gradle.api.internal.tasks.testing.worker.RemoteTestClassProcessor Thread 2” prio=5 tid=7f830ec35000 nid=0x114442000 waiting on condition [114441000]

java.lang.Thread.State: WAITING (parking)

at sun.misc.Unsafe.park(Native Method)

parking to wait for <7f6fa0c28> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)

at java.util.concurrent.locks.LockSupport.park(LockSupport.java:156)

at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1987)

at org.gradle.messaging.dispatch.DelayedReceive.receive(DelayedReceive.java:50)

at org.gradle.messaging.dispatch.AsyncReceive.receiveMessages(AsyncReceive.java:142)

at org.gradle.messaging.dispatch.AsyncReceive.access$000(AsyncReceive.java:36)

at org.gradle.messaging.dispatch.AsyncReceive$1.run(AsyncReceive.java:88)

at org.gradle.messaging.concurrent.DefaultExecutorFactory$StoppableExecutorImpl$1.run(DefaultExecutorFactory.java:66)

at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)

at java.lang.Thread.run(Thread.java:680)

“Incoming Connection [eaf47fc0-9c93-40b3-9293-e0cc845a4f07 port:59538, addresses:[/0:0:0:0:0:0:0:1, /127.0.0.1]]:0 outgoing org.gradle.api.internal.tasks.testing.worker.RemoteTestClassProcessor” prio=5 tid=7f830ec34800 nid=0x11433f000 waiting on condition [11433e000]

java.lang.Thread.State: WAITING (parking)

at sun.misc.Unsafe.park(Native Method)

parking to wait for <7f6f2c910> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)

at java.util.concurrent.locks.LockSupport.park(LockSupport.java:156)

at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1987)

at org.gradle.messaging.dispatch.AsyncDispatch.dispatchMessages(AsyncDispatch.java:114)

at org.gradle.messaging.dispatch.AsyncDispatch.access$000(AsyncDispatch.java:33)

at org.gradle.messaging.dispatch.AsyncDispatch$1.run(AsyncDispatch.java:72)

at org.gradle.messaging.concurrent.DefaultExecutorFactory$StoppableExecutorImpl$1.run(DefaultExecutorFactory.java:66)

at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)

at java.lang.Thread.run(Thread.java:680)

“Incoming Connection [eaf47fc0-9c93-40b3-9293-e0cc845a4f07 port:59538, addresses:[/0:0:0:0:0:0:0:1, /127.0.0.1]]:0 worker Thread 4” prio=5 tid=7f830b862000 nid=0x11423c000 waiting on condition [11423b000]

java.lang.Thread.State: WAITING (parking)

at sun.misc.Unsafe.park(Native Method)

parking to wait for <7f6f76440> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)