Question

服务器崩溃报告

服务器崩溃报告#有人知道这是什么崩溃报告？
# There is insufficient memory for the Java Runtime Environment to continue.
# Native memory allocation (mmap) failed to map 12582912 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:2638), pid=21517, tid=0x00007fe959fb9700
#
# JRE version: OpenJDK Runtime Environment (8.0_121-b13) (build 1.8.0_121-b13)
# Java VM: OpenJDK 64-Bit Server VM (25.121-b13 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
#

Answer 1

程序有bug把内存吃完了。

追问

能说具体点吗？

我准备采纳的

具体是什么程序？

具体是什么程序？把内存吃

追答

以下内容抄自文章《通过设置Weblogic设置线程数提高系统并发》——
出现这个原因的问题可能是因为Linux下系统对用户的默认线程数做了限制，可以通过

ulimit -a
命令进行查看，执行后出现的一堆结果中：
max user processes (-u) 1024
表示当前系统允许的最大线程数，可以把此参数设大一些。

ulimit -u 5000

设置当前系统用户最大允许的线程数，只对本次会话有效，如果想要永久生效，可以通过修改：

$ cat /etc/security/limits.d/90-nproc.conf
# Default limit for number of user‘s processes to prevent
# accidental fork bombs.
# See rhbz #432903 for reasoning.

* soft nproc 1024

只需要将1024改成你需要的值即可，设置完需要重启系统已生效。

追问

哦，这个我先采纳了还有什么？问题的话我再找你😂

改不了啊