阿里云centos7环境中， 内存1G, 当我执行composer require hwi/oauth-bundle时。 get一个错误，

<code>mmap() failed: [12] Cannot allocate memorySegmentation fault</code>

下面是我composer.json文件

<code class="json">{"name": "symfony/framework-standard-edition","license": "MIT","type": "project","description": "The \"Symfony Standard Edition\" distribution","autoload": {    "psr-4": { "": "src/" },    "classmap": [ "app/AppKernel.php", "app/AppCache.php" ]},"autoload-dev": {    "psr-4": { "Tests\\": "tests/" }},"require": {    "php": ">=5.5.9",    "symfony/symfony": "3.0.*",    "doctrine/orm": "^2.5",    "doctrine/doctrine-bundle": "^1.6",    "doctrine/doctrine-cache-bundle": "^1.2",    "symfony/swiftmailer-bundle": "^2.3",    "symfony/monolog-bundle": "^2.8",    "sensio/distribution-bundle": "^5.0",    "sensio/framework-extra-bundle": "^3.0.2",    "incenteev/composer-parameter-handler": "^2.0",    "knplabs/knp-paginator-bundle": "^2.5",    "vich/uploader-bundle": "^1.0",    "gregwar/captcha-bundle": "^2.0"},"require-dev": {    "sensio/generator-bundle": "^3.0",    "symfony/phpunit-bridge": "^3.0"},"scripts": {    "post-install-cmd": [        "Incenteev\\ParameterHandler\\ScriptHandler::buildParameters",        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::buildBootstrap",        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::clearCache",        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installAssets",        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installRequirementsFile",        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::prepareDeploymentTarget"    ],    "post-update-cmd": [        "Incenteev\\ParameterHandler\\ScriptHandler::buildParameters",        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::buildBootstrap",        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::clearCache",        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installAssets",        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installRequirementsFile",        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::prepareDeploymentTarget"    ]},"config": {    "platform": {        "php": "5.5.9"    }},"extra": {    "symfony-app-dir": "app",    "symfony-bin-dir": "bin",    "symfony-var-dir": "var",    "symfony-web-dir": "web",    "symfony-tests-dir": "tests",    "symfony-assets-install": "relative",    "incenteev-paramet<div>本文来*源gaodai^.ma#com搞#代!码网</div><pre>搞gaodaima代码

ers”: { “file”: “app/config/parameters.yml” }, “branch-alias”: { “dev-master”: “3.0-dev” }}

是由于内存不足导致的吗， 可有时候用conposer install能安装成功， 有时候就报这个错了， why

回复内容：

阿里云centos7环境中， 内存1G, 当我执行composer require hwi/oauth-bundle时。 get一个错误，

<code>mmap() failed: [12] Cannot allocate memorySegmentation fault</code>

下面是我composer.json文件

<code class="json">{"name": "symfony/framework-standard-edition","license": "MIT","type": "project","description": "The \"Symfony Standard Edition\" distribution","autoload": {    "psr-4": { "": "src/" },    "classmap": [ "app/AppKernel.php", "app/AppCache.php" ]},"autoload-dev": {    "psr-4": { "Tests\\": "tests/" }},"require": {    "php": ">=5.5.9",    "symfony/symfony": "3.0.*",    "doctrine/orm": "^2.5",    "doctrine/doctrine-bundle": "^1.6",    "doctrine/doctrine-cache-bundle": "^1.2",    "symfony/swiftmailer-bundle": "^2.3",    "symfony/monolog-bundle": "^2.8",    "sensio/distribution-bundle": "^5.0",    "sensio/framework-extra-bundle": "^3.0.2",    "incenteev/composer-parameter-handler": "^2.0",    "knplabs/knp-paginator-bundle": "^2.5",    "vich/uploader-bundle": "^1.0",    "gregwar/captcha-bundle": "^2.0"},"require-dev": {    "sensio/generator-bundle": "^3.0",    "symfony/phpunit-bridge": "^3.0"},"scripts": {    "post-install-cmd": [        "Incenteev\\ParameterHandler\\ScriptHandler::buildParameters",        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::buildBootstrap",        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::clearCache",        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installAssets",        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installRequirementsFile",        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::prepareDeploymentTarget"    ],    "post-update-cmd": [        "Incenteev\\ParameterHandler\\ScriptHandler::buildParameters",        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::buildBootstrap",        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::clearCache",        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installAssets",        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installRequirementsFile",        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::prepareDeploymentTarget"    ]},"config": {    "platform": {        "php": "5.5.9"    }},"extra": {    "symfony-app-dir": "app",    "symfony-bin-dir": "bin",    "symfony-var-dir": "var",    "symfony-web-dir": "web",    "symfony-tests-dir": "tests",    "symfony-assets-install": "relative",    "incenteev-parameters": {        "file": "app/config/parameters.yml"    },    "branch-alias": {        "dev-master": "3.0-dev"    }}</code>

是由于内存不足导致的吗， 可有时候用conposer install能安装成功， 有时候就报这个错了， why

可以尝试以下：

1. 查看服务器中是否提交了composer.lock文件，若没有，提交composer.lock文件后执行composer install（假设题主使用了版本控制，本地开发，服务器同步）

2. 查看当前PHP版本，如果不是最新版（PHP7），则升级至最新版

3. 如果以上解决不了，则考虑是否Linux系统安装时没有创建Swapfile，尝试创建后重试

4. 另外，可以考虑增加php.ini配置文件中对内存大小的限制memory_limit

可以尝试增加 swap 空间大小解决该问题

<code>/bin/dd if=/dev/zero of=/var/swap.1 bs=1M count=1024/sbin/mkswap /var/swap.1/sbin/swapon /var/swap.1</code>

上述增加 1G 的 swap 空间，可以试试哦

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