Re: NoSuchElement exc from randomizedtesting onSlaveIdle ...

2012-12-14 Thread Dawid Weiss 
Don't know what caused it -- but is seems impossible from Java centric
point of view:

[junit4:junit4] Caused by: java.util.NoSuchElementException
[junit4:junit4] at java.util.ArrayDeque.removeFirst(ArrayDeque.java:289)
[junit4:junit4] at java.util.ArrayDeque.pop(ArrayDeque.java:518)
[junit4:junit4] at
com.carrotsearch.ant.tasks.junit4.JUnit4$1.onSlaveIdle(JUnit4.java:800)

this ArrayDeque is used from a block of code that does this:

  if (stealingQueue.isEmpty()) {
slave.finished();
  } else {
String suiteName = stealingQueue.pop();
slave.newSuite(suiteName);
  }

Nothing else is removing elements from the queue. The code is
(theoretically) a critical section (it's guava's eventbus) so the
error above should never occur. Go figure.

Dawid

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Re: NoSuchElement exc from randomizedtesting onSlaveIdle ...

2012-12-14 Thread Michael McCandless 
On Fri, Dec 14, 2012 at 7:17 AM, Dawid Weiss
dawid.we...@cs.put.poznan.pl wrote:
 Don't know what caused it -- but is seems impossible from Java centric
 point of view:

 [junit4:junit4] Caused by: java.util.NoSuchElementException
 [junit4:junit4] at 
 java.util.ArrayDeque.removeFirst(ArrayDeque.java:289)
 [junit4:junit4] at java.util.ArrayDeque.pop(ArrayDeque.java:518)
 [junit4:junit4] at
 com.carrotsearch.ant.tasks.junit4.JUnit4$1.onSlaveIdle(JUnit4.java:800)

 this ArrayDeque is used from a block of code that does this:

   if (stealingQueue.isEmpty()) {
 slave.finished();
   } else {
 String suiteName = stealingQueue.pop();
 slave.newSuite(suiteName);
   }

 Nothing else is removing elements from the queue. The code is
 (theoretically) a critical section (it's guava's eventbus) so the
 error above should never occur. Go figure.

OK thanks Dawid.  This sounds like a J9 issue!  Craziness...

Mike McCandless

http://blog.mikemccandless.com

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Re: NoSuchElement exc from randomizedtesting onSlaveIdle ...

2012-12-14 Thread Dawid Weiss 
 OK thanks Dawid.  This sounds like a J9 issue!  Craziness...

Unless there's a bug in Google guava... I'd have to check and maybe stress test.

Dawid

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