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:a...@redhat.com] 
Sent: Tuesday, September 19, 2017 9:13 PM
To: Yu, Tim (NSB - CN/Chengdu) <tim...@nokia-sbell.com>; 
jdk8-dev@openjdk.java.net; jdk8u-...@openjdk.java.net
Cc: Shen, David (NSB - CN/Chengdu) <david.s...@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?

-- 
Andrew Haley
Java Platform Lead Engineer
Red Hat UK Ltd. <https://www.redhat.com>
EAC8 43EB D3EF DB98 CC77 2FAD A5CD 6035 332F A671

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