There is insufficient memory for the Java Runtime Environment to continue问题解决
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在linux系统下长时间进行性能測试,连续几次发生server假死无法连接上的情况,无奈仅仅能重新启动server。在測试路径下发现hs_err_pid17285.log文件,打开文件查看其主要内容例如以下:
# There is insufficient memory for the Java Runtime Environment to continue.
# Cannot create GC thread. Out of system resources.
# 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 (gcTaskThread.cpp:46), pid=17285, tid=47629249568816
#
# JRE version: 6.0_43-b01
# Java VM: Java HotSpot(TM) 64-Bit Server VM (20.14-b01 mixed mode linux-amd64 compressed oops)
从日志中分析,可能原因有两个:
一、可能物理内存不足
二、在32位操作系统下,系统进程数达到上限了。
然后分析server内存,可用物理内存以及swap空间都足,够,做个猜想,问题可能发生在系统进程数达到上限。
通过命令查看系统限制:ulimit -a查看open files不够大,尝试通过设大该值:
1、vi /etc/security/limits.conf
2、在文件最下方加上例如以下代码 * - nofile 278528 保存(已经设置得够大了)
此时通过ulimit -a或ulimit -n能够得到结果278528
在接下来的測试中经过观察,没有再发生服务假死不提供服务的情况,临时得到解决。
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