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From Vadim Semenov <vadim.seme...@datadoghq.com>
Subject Re: java.lang.OutOfMemoryError: unable to create new native thread
Date Mon, 31 Oct 2016 15:14:07 GMT
Have you tried to get number of threads in a running process using `cat
/proc/<pid>/status` ?

On Sun, Oct 30, 2016 at 11:04 PM, kant kodali <kanth909@gmail.com> wrote:

> yes I did run ps -ef | grep "app_name" and it is root.
>
>
>
> On Sun, Oct 30, 2016 at 8:00 PM, Chan Chor Pang <chin-sh@indetail.co.jp>
> wrote:
>
>> sorry, the UID
>>
>> On 10/31/16 11:59 AM, Chan Chor Pang wrote:
>>
>> 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>
>> 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> 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
>>>> > 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> 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-sch
>>>>> eduler-event-loop-java-lang-outofmemoryerror-unable-to-creat
>>>>> e-new-native
>>>>>
>>>>>
>>>>> Thanks,
>>>>> kant
>>>>>
>>>>>
>>>>> --
>>>>> ---*------------------------------------------------*---*---*---*---
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>

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