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Subject: Re: JVM BUG(s) - Hadoop's threads hanging
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Date: Sat, 21 Jun 2014 12:17:55 +0200
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From: "Ronald Klop" <ronald-lists@klop.ws>
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On Wed, 18 Jun 2014 17:10:08 +0200, Dmitry Sivachenko  =

<trtrmitya@gmail.com> wrote:

>
> On 17 =D0=B8=D1=8E=D0=BD=D1=8F 2014 =D0=B3., at 14:04, Dmitry Sivachen=
ko <trtrmitya@gmail.com>  =

> wrote:
>
>>
>> On 16 =D0=B8=D1=8E=D0=BD=D1=8F 2014 =D0=B3., at 18:45, Ronald Klop <r=
onald-lists@klop.ws> wrote:
>>
>>>
>>> Hi,
>>>
>>> From your information it is hard to say something about it. The bug =
 =

>>> can be in FreeBSD, OpenJDK (the Oracle part or in the BSD port part)=
,  =

>>> in Hadoop or in your own code running on top of Hadoop.
>>>
>>> My first idea would be to eliminate some of the possibilities.
>>> - Run a Linux machine with the same versions of the software.
>>> - Try FreeBSD 9-stable.
>>
>> I will try at least FreeBSD-9 soon (never used Linux so it will take =
 =

>> more time and not so relevant because I want to continue to use  =

>> FreeBSD, not just move to Linux)
>>
>
>
> Okay, I setup a similar configuration based on FreeBSD-9/stable.
>
> I see the same problems with both openjdk6 and openjdk7 described in m=
y  =

> previous e-mail.


Mmm, that makes it more though to solve. It would still be nice to know =
if  =

running Hadoop on another OS has the same problem. That gives a pointer =
 =

where to look.
And it would be nice to reduce your setup to a reproducible testcase, so=
  =

people can replay it. Otherwise it is just a lot of guessing from my sid=
e  =

what is happening internally in the application. I don't know how easy i=
t  =

is to create that.
Any news on the mailing-lists of Hadoop?

Regards,
Ronald.