启动服务报错Java 的“Cannot allocate memory”错误

最新推荐文章于 2025-06-20 17:20:16 发布

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最新推荐文章于 2025-06-20 17:20:16 发布

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本文链接：https://blog.youkuaiyun.com/wangyayun666/article/details/80894739

启动云测试服务器时遇到Java的'Cannot allocate memory'错误，该错误表明无法分配内存。问题源于Java执行进程时的内存分配方式。解决方案包括使用posix_spawn替代fork/exec或开启系统Over-commit。选择后者，通过修改系统变量vm.overcommit_memory为1来临时或永久解决此问题。

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在启动云测试服务器的时候，检验 java 版本的时候忽然遇到了一个 Cannot allocate memory 错误

[root@elcid-prod1 ~]# java -version

Java HotSpot(TM) 64-Bit Server VM warning: INFO: os::commit_memory(0x00007ff55c5ea000, 4096, 0) failed; error='Cannot allocate memory' (errno=12)

# There is insufficient memory for the Java Runtime Environment to continue.

# Native memory allocation (mmap) failed to map 4096 bytes for committing reserved memory.

# An error report file with more information is saved as:

# /root/hs_err_pid5138.log

查找了一下相关文档，发现这个错误的含义其实就是像它自己说的，没法分配内存了。

The problem is inherent with the way Java allocates memory when executing processes. When Java executes a process, it must fork() then exec(). Forking creates a child process by duplicating the current process. By duplicating the current process, the new child process will request approximately the same amount of memory as its parent process,