java - Tomcat7 : Out of memory error occurred when executing shutdown. sh

Question

我的Tomcat服务器已经运行了好几天了，但是我无法正常关闭它，因为在执行shutdown.sh时，出现了这样的错误:

# root@iZ94hjppdqzZ:~/projects/taolijie# cat hs_err_pid5519.log 
# There is insufficient memory for the Java Runtime Environment to continue.
# Native memory allocation (mmap) failed to map 1073741824 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:2673), pid=5519, tid=3061726064
#
# JRE version:  (8.0_45-b14) (build )
# Java VM: Java HotSpot(TM) Server VM (25.45-b02 mixed mode linux-x86 )
# Failed to write core dump. Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java again
#

因此我必须杀死 Tomcat 才能将其关闭。但奇怪的是，出现这个错误时Tomcat工作正常(可以正常处理web请求)。

以下是虚拟机选项:

-server -Xms1G -Xmx1G -XX:+UseG1GC

我的服务器有 2GB 内存。谁能弄清楚发生了什么？ 谢谢!!

Answer 1

这看起来您正在通过以下方式设置内存配置:

JAVA_OPTS="-server -Xms1G -Xmx1G -XX:+UseG1GC"

JAVA_OPTS 环境变量用于 Tomcat 的所有 java 进程，例如用于发送关闭消息的进程。

您需要确定您正在通过设置配置您的 Tomcat 内存:

CATALINA_OPTS="-server -Xms1G -Xmx1G -XX:+UseG1GC"

此设置将仅应用于 Tomcat 进程。其他控制进程将使用默认内存设置正常执行。