【发布时间】：2016-11-02 17:55:32
【问题描述】：
虽然这是各种 Stackoverflow 用户报告的典型错误消息，但我的问题与如何评估提出的解决方案是否解决问题有关。
我阅读了与此错误相关的各种讨论和文章，并且大多数解决方案都深入到 Linux ulimits，我想这对我来说似乎也是如此。
我的 ulimit 值为：
STACK 10240k, CORE 0k, NPROC 1024, NOFILE 4096;
我猜这个问题可能是 NOPROC / NOFILE 太低（只有默认值）。
但是，我想知道是否有一种确切的方法来确定根本原因，例如 NOPROC 已超出等，以及是否有一种方法可以准确评估当前正在使用的进程/文件句柄的数量；或者还有其他一些我应该关注的可以统计评估的问题吗？
仅供参考，发生此问题时，未启用 heapdump，并且在错误点没有 threadump 数据。
感谢您对评估和解决此问题的投入。
这是简短的堆栈跟踪：
Caused by: java.lang.OutOfMemoryError: unable to create new native thread
at java.lang.Thread.start0(Native Method)
at java.lang.Thread.start(Thread.java:714)
这是系统值：
OS:Red Hat Enterprise Linux Server release 6.3 (Santiago)
uname:Linux 2.6.32-279.el6.x86_64 #1 SMP Wed Jun 13 18:24:36 EDT 2012 x86_64
libc:glibc 2.12 NPTL 2.12
rlimit: STACK 10240k, CORE 0k, NPROC 1024, NOFILE 4096, AS infinity
load average:0.11 0.10 0.03
CPU:total 32 (8 cores per cpu, 2 threads per core) family 6 model 45 stepping 7, cmov, cx8, fxsr, mmx, sse, sse2, sse3, ssse3, sse4.1, sse4.2, popcnt, avx, aes, ht, tsc, tscinvbit, tscinv
/proc/meminfo:
MemTotal: 74206252 kB
MemFree: 2788244 kB
Buffers: 1042212 kB
Cached: 58454988 kB
SwapCached: 2860 kB
Active: 38242540 kB
Inactive: 29129604 kB
这是来自 JVM 崩溃报告的信息 - hs_err_pidxxxxx.log：
# There is insufficient memory for the Java Runtime Environment to continue.
# Cannot create GC thread. Out of system resources.
...
# Out of Memory Error (gcTaskThread.cpp:46), pid=20396, tid=140365307795200
# JRE version: (7.0_80-b15) (build )
# Java VM: Java HotSpot(TM) 64-Bit Server VM (24.80-b11 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
Current thread (0x00007fa95400a800): JavaThread "Unknown thread" [_thread_in_vm, id=20458, stack(0x00007fa9583f5000,0x00007fa9584f6000)]
Stack: [0x00007fa9583f5000,0x00007fa9584f6000], sp=0x00007fa9584f4540, free space=1021k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
V [libjvm.so+0x9a320a] VMError::report_and_die()+0x2ea
V [libjvm.so+0x498d3b] report_vm_out_of_memory(char const*, int, unsigned long, char const*)+0x9b
V [libjvm.so+0x55943a] GCTaskThread::GCTaskThread(GCTaskManager*, unsigned int, unsigned int)+0x11a
V [libjvm.so+0x5589b8] GCTaskManager::initialize()+0x2b8
V [libjvm.so+0x843438] ParallelScavengeHeap::initialize()+0x6f8
V [libjvm.so+0x97509a] Universe::initialize_heap()+0xca
V [libjvm.so+0x976269] universe_init()+0x79
V [libjvm.so+0x5b2f25] init_globals()+0x65
V [libjvm.so+0x95db4d] Threads::create_vm(JavaVMInitArgs*, bool*)+0x1ed
V [libjvm.so+0x63b2e4] JNI_CreateJavaVM+0x74
C [libjli.so+0x2f8e] JavaMain+0x9e
Java Threads: ( => current thread )
Other Threads:
=>0x00007fa95400a800 (exited) JavaThread "Unknown thread" [_thread_in_vm, id=20458, stack(0x00007fa9583f5000,0x00007fa9584f6000)]
VM state:not at safepoint (not fully initialized)
VM Mutex/Monitor currently owned by a thread: None
GC Heap History (0 events):
No events
Deoptimization events (0 events):
No events
Internal exceptions (0 events):
No events
Events (0 events):
No events
【问题讨论】：
标签： java jvm out-of-memory jvm-hotspot ulimit