OpenJDK OOM issue -

[Poonam Parhar]

Hello Tim,

>From the hs_err_pid12678.log file, the java heap is based at 0x715a00000 which is 28gb, so there should be plenty of space available for the native heap.

Memory map:
...
00600000-00601000 rw-p 00000000 fc:01 17950                              /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.131-0.b11.el6_9.x86_64/jre/bin/java
019bc000-019dd000 rw-p 00000000 00:00 0                                  [heap]
715a00000-71cd00000 rw-p 00000000 00:00 0
71cd00000-787380000 ---p 00000000 00:00 0
...

Heap
 PSYoungGen      total 51200K, used 13258K [0x0000000787380000, 0x000000078ac80000, 0x00000007c0000000)
  eden space 44032K, 30% used [0x0000000787380000,0x0000000788072ad0,0x0000000789e80000)
  from space 7168K, 0% used [0x000000078a580000,0x000000078a580000,0x000000078ac80000)
  to   space 7168K, 0% used [0x0000000789e80000,0x0000000789e80000,0x000000078a580000)
 ParOldGen       total 117760K, used 0K [0x0000000715a00000, 0x000000071cd00000, 0x0000000787380000)
  object space 117760K, 0% used [0x0000000715a00000,0x0000000715a00000,0x000000071cd00000)
 Metaspace       used 10485K, capacity 10722K, committed 11008K, reserved 1058816K
  class space    used 1125K, capacity 1227K, committed 1280K, reserved 1048576K


To narrow down the issue, would it be possible for you to test with -XX:-UseCompressedOops? 

Thanks,
Poonam

> -----Original Message-----
> From: David Holmes
> Sent: Wednesday, September 20, 2017 4:43 AM
> To: Yu, Tim (NSB - CN/Chengdu); Andrew Haley; Poonam Parhar; hotspot-
> dev developers
> Cc: Shen, David (NSB - CN/Chengdu)
> Subject: Re: OpenJDK OOM issue -
> 
> Tim,
> 
> Please note attachments get stripped from the mailing lists.
> 
> All - please drop the jdk8-dev and jdk8u-dev mailing lists from this
> and leave it just on hotspot-dev. I've tried to bcc those lists.
> 
> Thank you.
> 
> David
> 
> On 20/09/2017 6:44 PM, Yu, Tim (NSB - CN/Chengdu) wrote:
> > Hi All
> >
> > Thank you all for the quick response.
> > The environment information is listed as below, could you please help
> to further check?
> >
> > 1. What OS is this?
> > # cat /etc/redhat-release
> > Red Hat Enterprise Linux Server release 6.9 (Santiago) # uname -a
> > Linux cloudyvm16 2.6.32-696.6.3.el6.x86_64 #1 SMP Fri Jun 30 13:24:18
> > EDT 2017 x86_64 x86_64 x86_64 GNU/Linux
> >
> > 2.GC log is listed as below. The heap information cannot be printed
> out in gc-2017_09_20-09_21_15.log when OOM happens. In gc-2017_09_20-
> 09_21_17.log, you can see the heap begins with 0x0000000787380000 and
> it should be not the first 4G virtual memory address.
> > -rw-r--r-- 1       19477 Sep 20 09:21 hs_err_pid12678.log
> > -rw-r--r-- 1       570 Sep 20 09:21 gc-2017_09_20-09_21_15.log
> > -rw-r--r-- 1       17741 Sep 20 09:21 hs_err_pid12706.log
> > -rw-r--r-- 1       1297 Sep 20 09:21 gc-2017_09_20-09_21_17.log
> > -rw-r--r-- 1       1722 Sep 20 09:21 gc-2017_09_20-09_21_18.log
> > -rw-r--r-- 1       1297 Sep 20 09:21 gc-2017_09_20-09_21_19.log
> > -rw-r--r-- 1       1297 Sep 20 09:21 gc-2017_09_20-09_21_20.log
> >
> > 3. This issue happens occasionally but frequently. We periodically
> launch a JAVA program to use JMX to monitor service status of another
> JAVA service.
> >
> > Br,
> > Tim
> >
> >
> >
> >
> > -----Original Message-----
> > From: Andrew Haley [mailto:aph at redhat.com]
> > Sent: Tuesday, September 19, 2017 9:13 PM
> > To: Yu, Tim (NSB - CN/Chengdu) <tim.yu at nokia-sbell.com>;
> > jdk8-dev at openjdk.java.net; jdk8u-dev at openjdk.java.net
> > Cc: Shen, David (NSB - CN/Chengdu) <david.shen at nokia-sbell.com>
> > Subject: Re: OpenJDK OOM issue -
> >
> > On 19/09/17 09:50, Yu, Tim (NSB - CN/Chengdu) wrote:
> >> Hi OpenJDK dev group
> >>
> >> We meet one issue that the VM failed to initialize. The error log is
> as below. We checked both memory usage and thread number. They do not
> hit the limit. So could you please help to confirm why
> "java.lang.OutOfMemoryError: unable to create new native thread" error
> occurs? Many thanks.
> >
> > What OS is this?
> >