docker 部署 java web项目到tomcat之后无法显示验证码问题及解决过程

1、公司新的支付项目采用zookeeper+dubbo微服务架构

2、开发环境和测试环境、模测环境、生产环境采用docker部署

3、今天在和我们的运维一块搭建和调试jenkins+svn+docker+harbor时，遇到我们部署的java web项目的登录验证不能显示问题。

    1）通过在验证码类中记录比较详细的日志，最后排查出是awt库中的java.awt.Graphics2D类，在调用起实例的drawString方法时报了httpstaus 500错误

    2）通过

   https://blog.csdn.net/qq_36836224/article/details/80250220

提供的测试类，在docker中编译此类，得到更精准的异常信息

   bash-4.4# java Graphics2DTest

bash-4.4# java Graphics2DTest         
Exception in thread "main" java.lang.UnsatisfiedLinkError: /jdk/jre/lib/amd64/libfontmanager.so: libgcc_s.so.1: cannot open shared object file: No such file or directory
        at java.lang.ClassLoader$NativeLibrary.load(Native Method)
        at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1941)
        at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1845)
        at java.lang.Runtime.loadLibrary0(Runtime.java:870)
        at java.lang.System.loadLibrary(System.java:1122)
        at sun.font.FontManagerNativeLibrary$1.run(FontManagerNativeLibrary.java:61)
        at java.security.AccessController.doPrivileged(Native Method)
        at sun.font.FontManagerNativeLibrary.<clinit>(FontManagerNativeLibrary.java:32)
        at sun.font.SunFontManager$1.run(SunFontManager.java:339)
        at java.security.AccessController.doPrivileged(Native Method)
        at sun.font.SunFontManager.<clinit>(SunFontManager.java:335)
        at sun.font.FontDesignMetrics.getMetrics(FontDesignMetrics.java:264)
        at sun.java2d.SunGraphics2D.getFontMetrics(SunGraphics2D.java:863)
        at Graphics2DTest.main(Graphics2DTest.java:32)

   3）、通过上述错误找到https://blog.soilove.cn/archives/1592.html资料
      跟运维沟通安装libgcc_s.so.1
   4）、安装之后运维反馈继续报错，然后我登录进去docker，执行java Graphics2DTest发现确实依然报，再通过find命令去查 find / -name  libgcc_s.so.1
      发现/usr/lib/libgcc_s.so.1  不在/jdk/jre/lib/amd64/目录下，故此我把libgcc_s.so.1拷贝到/jdk/jre/lib/amd64/目录
   5）、然后继续执行java Graphics2DTest进行测试，发现了新的报错信息
   

bash-4.4# java Graphics2DTest
Exception in thread "main" java.lang.UnsatisfiedLinkError: /jdk/jre/lib/amd64/libfontmanager.so: libc.musl-x86_64.so.1: cannot open shared object file: No such file or directory
        at java.lang.ClassLoader$NativeLibrary.load(Native Method)
        at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1941)
        at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1845)
        at java.lang.Runtime.loadLibrary0(Runtime.java:870)
        at java.lang.System.loadLibrary(System.java:1122)
        at sun.font.FontManagerNativeLibrary$1.run(FontManagerNativeLibrary.java:61)
        at java.security.AccessController.doPrivileged(Native Method)
        at sun.font.FontManagerNativeLibrary.<clinit>(FontManagerNativeLibrary.java:32)
        at sun.font.SunFontManager$1.run(SunFontManager.java:339)
        at java.security.AccessController.doPrivileged(Native Method)
        at sun.font.SunFontManager.<clinit>(SunFontManager.java:335)
        at sun.font.FontDesignMetrics.getMetrics(FontDesignMetrics.java:264)
        at sun.java2d.SunGraphics2D.getFontMetrics(SunGraphics2D.java:863)
        at Graphics2DTest.main(Graphics2DTest.java:32)

     
    6）、再把libc.musl-x86_64.so.1拷贝到/jdk/jre/lib/amd64/目录，再执行测试通过
    7）、再验证web验证码服务，发现恢复正常