[Java知识库]Unable to create tempDir. java.io.tmpdir is set to C: |Users |SRV-DA~1 |AppData |Local |Temp |5 |

1.问题描述

在Windows server下，跑了几个月的程序，突然报警了，我也很无语

org.springframework.context.ApplicationContextException: Unable to start web server; nested exception is org.springframework.boot.web.server.WebServerException: Unable to create tempDir. java.io.tmpdir is set to C:\Users\SRV-DA~1\AppData\Local\Temp\5\
        at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh(ServletWebServerApplicationContext.java:162) ~[spring-boot-2.4.3.jar!/:2.4.3]
        at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:576) ~[spring-context-5.3.4.jar!/:5.3.4]
        at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:144) ~[spring-boot-2.4.3.jar!/:2.4.3]
        at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:767) [spring-boot-2.4.3.jar!/:2.4.3]
        at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:759) [spring-boot-2.4.3.jar!/:2.4.3]
        at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:426) [spring-boot-2.4.3.jar!/:2.4.3]
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:326) [spring-boot-2.4.3.jar!/:2.4.3]
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:1311) [spring-boot-2.4.3.jar!/:2.4.3]
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:1300) [spring-boot-2.4.3.jar!/:2.4.3]
        at com.delta.DmsReplaceSapFileApplication.main(DmsReplaceSapFileApplication.java:13) [classes!/:0.1-SNAPSHOT]
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_191]
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_191]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_191]
        at java.lang.reflect.Method.invoke(Unknown Source) ~[na:1.8.0_191]
        at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:49) [dms-replace-sap-file-0.1-SNAPSHOT.jar:0.1-SNAPSHOT]
        at org.springframework.boot.loader.Launcher.launch(Launcher.java:108) [dms-replace-sap-file-0.1-SNAPSHOT.jar:0.1-SNAPSHOT]
        at org.springframework.boot.loader.Launcher.launch(Launcher.java:58) [dms-replace-sap-file-0.1-SNAPSHOT.jar:0.1-SNAPSHOT]
        at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:88) [dms-replace-sap-file-0.1-SNAPSHOT.jar:0.1-SNAPSHOT]
Caused by: org.springframework.boot.web.server.WebServerException: Unable to create tempDir. java.io.tmpdir is set to C:\Users\SRV-DA~1\AppData\Local\Temp\5\
        at org.springframework.boot.web.server.AbstractConfigurableWebServerFactory.createTempDir(AbstractConfigurableWebServerFactory.java:195) ~[spring-boot-2.4.3.jar!/:2.4.3]
        at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.getWebServer(TomcatServletWebServerFactory.java:186) ~[spring-boot-2.4.3.jar!/:2.4.3]
        at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.createWebServer(ServletWebServerApplicationContext.java:181) ~[spring-boot-2.4.3.jar!/:2.4.3]
        at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh(ServletWebServerApplicationContext.java:159) ~[spring-boot-2.4.3.jar!/:2.4.3]
        ... 17 common frames omitted
Caused by: java.nio.file.NoSuchFileException: C:\Users\SRV-DA~1\AppData\Local\Temp\5\tomcat.8082.2026523687593087531
        at sun.nio.fs.WindowsException.translateToIOException(Unknown Source) ~[na:1.8.0_191]
        at sun.nio.fs.WindowsException.rethrowAsIOException(Unknown Source) ~[na:1.8.0_191]
        at sun.nio.fs.WindowsException.rethrowAsIOException(Unknown Source) ~[na:1.8.0_191]
        at sun.nio.fs.WindowsFileSystemProvider.createDirectory(Unknown Source) ~[na:1.8.0_191]
        at java.nio.file.Files.createDirectory(Unknown Source) ~[na:1.8.0_191]
        at java.nio.file.TempFileHelper.create(Unknown Source) ~[na:1.8.0_191]
        at java.nio.file.TempFileHelper.createTempDirectory(Unknown Source) ~[na:1.8.0_191]
        at java.nio.file.Files.createTempDirectory(Unknown Source) ~[na:1.8.0_191]
        at org.springframework.boot.web.server.AbstractConfigurableWebServerFactory.createTempDir(AbstractConfigurableWebServerFactory.java:189) ~[spring-boot-2.4.3.jar!/:2.4.3]
        ... 20 common frames omitted

• 报警Unable to create tempDir. java.io.tmpdir is set to C:\Users\SRV-DA~1\AppData\Local\Temp\5\
• SRV-DA~1为什么变成这样，我也不知道(就是当前用户名SRV-Data)
• 报警的意思就是临时路径找不到\temp\5\

2.解决方法

• 在C盘找到对应位置。手动添加路径（不推荐）

• 指定一个路径，如下

@Configuration(proxyBeanMethods = false)
public class MultipartConfig {
    @Bean
    MultipartConfigElement multipartConfigElement() {
        MultipartConfigFactory factory = new MultipartConfigFactory();
        // C:/Users/xxx/AppData/Local/Temp
        String location = System.getProperty("user.home") + "/AppData/Local/Temp";
        File tmpFile = new File(location);
        if (!tmpFile.exists()) {
            tmpFile.mkdirs();
        }
        factory.setLocation(location);
        return factory.createMultipartConfig();
    }
}

• 重新指定java -Djava.io.tempdir=D:/tmpdir -jar xxxx.jar

• 修改tomcat临时存放文件位置(不推荐)

//此方法会将所有tomcat的临时文件都放在指定目录，新目录没有定时清理功能，不建议
server.tomcat.basedir=xxxxxx

• 修改VM定时清理功能（不建议)

3.好奇

查看了一下，用户名下面确实好多临时文件夹