java错误，请在hs_err_pidXXX中输入信息。JVM崩溃时的日志文件

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我有一个运行JDK1.8.0_102的java应用程序。当应用程序崩溃（内存不足-见下文）时，会生成一个文件hs_err_pidXXX，其中包含有关jvm、系统、内存、线程等的多个信息


    #
    # There is insufficient memory for the Java Runtime Environment to continue.
    # Native memory allocation (mmap) failed to map 65536 bytes for committing reserved memory.
    # Possible reasons:
    #   The system is out of physical RAM or swap space
    #   In 32 bit mode, the process size limit was hit
    # Possible solutions:
    #   Reduce memory load on the system
    #   Increase physical memory or swap space
    #   Check if swap backing store is full
    #   Use 64 bit Java on a 64 bit OS
    #   Decrease Java heap size (-Xmx/-Xms)
    #   Decrease number of Java threads
    #   Decrease Java thread stack sizes (-Xss)
    #   Set larger code cache with -XX:ReservedCodeCacheSize=
    # This output file may be truncated or incomplete.
    #
    #  Out of Memory Error (os_linux.cpp:2627), pid=1094, tid=0x00007fac4041e700
    #
    # JRE version: Java(TM) SE Runtime Environment (8.0_102-b14) (build 1.8.0_102-b14)
    # Java VM: Java HotSpot(TM) 64-Bit Server VM (25.102-b14 mixed mode linux-amd64 compressed oops)
    # Failed to write core dump. Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java again
    #


    ---------------  S Y S T E M  ---------------

    OS:DISTRIB_ID=Ubuntu
    DISTRIB_RELEASE=14.04
    DISTRIB_CODENAME=trusty
    DISTRIB_DESCRIPTION="Ubuntu 14.04.5 LTS"

    uname:Linux 3.13.0-101-generic #148-Ubuntu SMP Thu Oct 20 22:08:32 UTC 2016 x86_64
    libc:glibc 2.19 NPTL 2.19 
    rlimit: STACK 8192k, CORE 0k, NPROC 30034, NOFILE 4096, AS infinity
    load average:10.38 6.50 2.88

在上面的信息列表中，我可以看到以下行： rlimit:STACK 8192k，CORE 0k，NPROC 30034，NOFILE 4096，AS infinity

我的问题如下：为什么NOFILE与我在系统上设置的值不一致（在limits.conf文件中，它应该是20000）？当我使用与运行jvm的用户相同的用户运行ulimit-n命令时，我有一个不同的值。请注意，显示的堆栈是我在系统上设置的正确值，而不是默认值。 JVM在AWS c3上运行。大型随需应变实例

以下是ulimit-a命令的结果：

core file size          (blocks, -c) 0
data seg size           (kbytes, -d) unlimited
scheduling priority             (-e) 0
file size               (blocks, -f) unlimited
pending signals                 (-i) 30034
max locked memory       (kbytes, -l) 64
max memory size         (kbytes, -m) unlimited
open files                      (-n) 20000
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) 30034
virtual memory          (kbytes, -v) unlimited
file locks                      (-x) unlimited

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java错误，请在hs_err_pidXXX中输入信息。JVM崩溃时的日志文件

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