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From Chan Chor Pang <chin...@indetail.co.jp>
Subject Re: java.lang.OutOfMemoryError: unable to create new native thread
Date Mon, 31 Oct 2016 02:59:10 GMT
actually if the max user processes is not the problem, i have no idea

but i still suspecting the user,
as the user who run spark-submit is not necessary the pid for the JVM 
process

can u make sure when you "ps -ef | grep {your app id} " the PID is root?

On 10/31/16 11:21 AM, kant kodali wrote:
> The java process is run by the root and it has the same config
>
> sudo -i
>
> ulimit -a
>
> core file size          (blocks, -c) 0
> data seg size           (kbytes, -d) unlimited
> scheduling priority             (-e) 0
> file size               (blocks, -f) unlimited
> pending signals                 (-i) 120242
> max locked memory       (kbytes, -l) 64
> max memory size         (kbytes, -m) unlimited
> open files                      (-n) 1024
> pipe size            (512 bytes, -p) 8
> POSIX message queues     (bytes, -q) 819200
> real-time priority              (-r) 0
> stack size              (kbytes, -s) 8192
> cpu time               (seconds, -t) unlimited
> max user processes              (-u) 120242
> virtual memory          (kbytes, -v) unlimited
> file locks                      (-x) unlimited
>
>
>
> On Sun, Oct 30, 2016 at 7:01 PM, Chan Chor Pang 
> <chin-sh@indetail.co.jp <mailto:chin-sh@indetail.co.jp>> wrote:
>
>     I have the same Exception before and the problem fix after i
>     change the nproc conf.
>
>     > max user processes (-u) 120242
>     ↑this config does looks good.
>     are u sure the user who run ulimit -a is the same user who run the
>     Java process?
>     depend on how u submit the job and your setting, spark job may
>     execute by other user.
>
>
>     On 10/31/16 10:38 AM, kant kodali wrote:
>>     when I did this
>>
>>     cat /proc/sys/kernel/pid_max
>>
>>     I got 32768
>>
>>
>>     On Sun, Oct 30, 2016 at 6:36 PM, kant kodali <kanth909@gmail.com
>>     <mailto:kanth909@gmail.com>> wrote:
>>
>>         I believe for ubuntu it is unlimited but I am not 100% sure
>>         (I just read somewhere online). I ran ulimit -a and this is
>>         what I get
>>
>>         core file size          (blocks, -c) 0
>>         data seg size           (kbytes, -d) unlimited
>>         scheduling priority             (-e) 0
>>         file size               (blocks, -f) unlimited
>>         pending signals                 (-i) 120242
>>         max locked memory       (kbytes, -l) 64
>>         max memory size         (kbytes, -m) unlimited
>>         open files                      (-n) 1024
>>         pipe size            (512 bytes, -p) 8
>>         POSIX message queues     (bytes, -q) 819200
>>         real-time priority              (-r) 0
>>         stack size              (kbytes, -s) 8192
>>         cpu time               (seconds, -t) unlimited
>>         max user processes              (-u) 120242
>>         virtual memory          (kbytes, -v) unlimited
>>         file locks                      (-x) unlimited
>>
>>         On Sun, Oct 30, 2016 at 6:15 PM, Chan Chor Pang
>>         <chin-sh@indetail.co.jp <mailto:chin-sh@indetail.co.jp>> wrote:
>>
>>             not sure for ubuntu, but i think you can just create the
>>             file by yourself
>>             the syntax will be the same as /etc/security/limits.conf
>>
>>             nproc.conf not only limit java process but all process by
>>             the same user
>>
>>             so even the jvm process does nothing,  if the
>>             corresponding user is busy in other way
>>             the jvm process will still not able to create new thread.
>>
>>             btw the default limit for centos is 1024
>>
>>
>>             On 10/31/16 9:51 AM, kant kodali wrote:
>>>
>>>             On Sun, Oct 30, 2016 at 5:22 PM, Chan Chor Pang
>>>             <chin-sh@indetail.co.jp <mailto:chin-sh@indetail.co.jp>>
>>>             wrote:
>>>
>>>                 /etc/security/limits.d/90-nproc.conf
>>>
>>>
>>>             Hi,
>>>
>>>             I am using Ubuntu 16.04 LTS. I have this directory
>>>             /etc/security/limits.d/ but I don't have any files
>>>             underneath it. This error happens after running for 4 to
>>>             5 hours. I wonder if this is a GC issue? And I am
>>>             thinking if I should use CMS. I have also posted this on
>>>             SO since I havent got much response for this question
>>>             http://stackoverflow.com/questions/40315589/dag-scheduler-event-loop-java-lang-outofmemoryerror-unable-to-create-new-native
>>>             <http://stackoverflow.com/questions/40315589/dag-scheduler-event-loop-java-lang-outofmemoryerror-unable-to-create-new-native>
>>>
>>>
>>>             Thanks,
>>>             kant
>>
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