禁用springboot内嵌tomcat的MANIFEST扫描

架构学习圈 2021-07-26

3357

本文介绍实现一个将word转为pdf的需求过程中，遇到jar扫描异常的问题排查及解决。本文采用springboot2.0集成jodconverter，使用openoffice6。

首先添加依赖，

<dependency>
  <groupId>org.jodconverter</groupId>
  <artifactId>jodconverter-spring-boot-starter</artifactId>
  <version>4.2.2</version>
</dependency>


<dependency>
  <groupId>org.jodconverter</groupId>
  <artifactId>jodconverter-local</artifactId>
  <version>4.2.2</version>
</dependency>

修改[配置文件application.yml](https://github.com/sbraconnier/jodconverter/blob/master/jodconverter-samples/jodconverter-sample-spring-boot/src/main/resources/application.yml)

@Autowired private DocumentConverter converter;

格式转换：

converter.convert(new File(wordFilePath)).to(targetFile).as(DefaultDocumentFormatRegistry.HTML).execute();

[参考示例ConverterController.java](https://github.com/sbraconnier/jodconverter/blob/master/jodconverter-samples/jodconverter-sample-spring-boot/src/main/java/org/jodconverter/sample/springboot/ConverterController.java)

虽然能够正常转换成pdf文件，但是出现一些警告信息，终归不爽。提示信息如下：

2021-05-18 08:52:43.929  WARN [-,,,] 11888 --- [ost-startStop-1] o.a.tomcat.util.scan.StandardJarScanner  : Failed to scan [file:/D:/repository/org/openoffice/juh/4.1.2/ridl.jar] from classloader hierarchy


java.io.FileNotFoundException: D:\repository\org\openoffice\juh\4.1.2\ridl.jar (系统找不到指定的文件。)
  at java.util.zip.ZipFile.open(Native Method)
  at java.util.zip.ZipFile.<init>(ZipFile.java:225)
  at java.util.zip.ZipFile.<init>(ZipFile.java:155)
  at java.util.jar.JarFile.<init>(JarFile.java:166)
  at java.util.jar.JarFile.<init>(JarFile.java:130)
  at org.apache.tomcat.util.compat.JreCompat.jarFileNewInstance(JreCompat.java:197)
  at org.apache.tomcat.util.scan.JarFileUrlJar.<init>(JarFileUrlJar.java:65)
  at org.apache.tomcat.util.scan.JarFactory.newInstance(JarFactory.java:49)
  at org.apache.tomcat.util.scan.StandardJarScanner.process(StandardJarScanner.java:385)
  at org.apache.tomcat.util.scan.StandardJarScanner.processURLs(StandardJarScanner.java:320)
  at org.apache.tomcat.util.scan.StandardJarScanner.doScanClassPath(StandardJarScanner.java:271)
  at org.apache.tomcat.util.scan.StandardJarScanner.scan(StandardJarScanner.java:234)
  at org.apache.jasper.servlet.TldScanner.scanJars(TldScanner.java:262)
  at org.apache.jasper.servlet.TldScanner.scan(TldScanner.java:104)
  at org.apache.jasper.servlet.JasperInitializer.onStartup(JasperInitializer.java:101)
  at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5154)
  at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
  at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1412)
  at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1402)
  at java.util.concurrent.FutureTask.run$$$capture(FutureTask.java:266)
  at java.util.concurrent.FutureTask.run(FutureTask.java)
  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
  at java.lang.Thread.run(Thread.java:748)


2021-05-18 08:52:43.929  WARN [-,,,] 11888 --- [ost-startStop-1] o.a.tomcat.util.scan.StandardJarScanner  : Failed to scan [file:/D:/repository/org/openoffice/juh/4.1.2/jurt.jar] from classloader hierarchy


java.io.FileNotFoundException: D:\repository\org\openoffice\juh\4.1.2\jurt.jar (系统找不到指定的文件。)
  at java.util.zip.ZipFile.open(Native Method)
  at java.util.zip.ZipFile.<init>(ZipFile.java:225)
  at java.util.zip.ZipFile.<init>(ZipFile.java:155)
  at java.util.jar.JarFile.<init>(JarFile.java:166)
  at java.util.jar.JarFile.<init>(JarFile.java:130)
  at org.apache.tomcat.util.compat.JreCompat.jarFileNewInstance(JreCompat.java:197)
  at org.apache.tomcat.util.scan.JarFileUrlJar.<init>(JarFileUrlJar.java:65)
  at org.apache.tomcat.util.scan.JarFactory.newInstance(JarFactory.java:49)
  at org.apache.tomcat.util.scan.StandardJarScanner.process(StandardJarScanner.java:385)
  at org.apache.tomcat.util.scan.StandardJarScanner.processURLs(StandardJarScanner.java:320)
  at org.apache.tomcat.util.scan.StandardJarScanner.doScanClassPath(StandardJarScanner.java:271)
  at org.apache.tomcat.util.scan.StandardJarScanner.scan(StandardJarScanner.java:234)
  at org.apache.jasper.servlet.TldScanner.scanJars(TldScanner.java:262)
  at org.apache.jasper.servlet.TldScanner.scan(TldScanner.java:104)
  at org.apache.jasper.servlet.JasperInitializer.onStartup(JasperInitializer.java:101)
  at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5154)
  at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
  at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1412)
  at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1402)
  at java.util.concurrent.FutureTask.run$$$capture(FutureTask.java:266)
  at java.util.concurrent.FutureTask.run(FutureTask.java)
  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
  at java.lang.Thread.run(Thread.java:748)


2021-05-18 08:52:43.930  WARN [-,,,] 11888 --- [ost-startStop-1] o.a.tomcat.util.scan.StandardJarScanner  : Failed to scan [file:/D:/repository/org/openoffice/jurt/4.1.2/ridl.jar] from classloader hierarchy


java.io.FileNotFoundException: D:\repository\org\openoffice\jurt\4.1.2\ridl.jar (系统找不到指定的文件。)
  at java.util.zip.ZipFile.open(Native Method)
  at java.util.zip.ZipFile.<init>(ZipFile.java:225)
  at java.util.zip.ZipFile.<init>(ZipFile.java:155)
  at java.util.jar.JarFile.<init>(JarFile.java:166)
  at java.util.jar.JarFile.<init>(JarFile.java:130)
  at org.apache.tomcat.util.compat.JreCompat.jarFileNewInstance(JreCompat.java:197)
  at org.apache.tomcat.util.scan.JarFileUrlJar.<init>(JarFileUrlJar.java:65)
  at org.apache.tomcat.util.scan.JarFactory.newInstance(JarFactory.java:49)
  at org.apache.tomcat.util.scan.StandardJarScanner.process(StandardJarScanner.java:385)
  at org.apache.tomcat.util.scan.StandardJarScanner.processURLs(StandardJarScanner.java:320)
  at org.apache.tomcat.util.scan.StandardJarScanner.doScanClassPath(StandardJarScanner.java:271)
  at org.apache.tomcat.util.scan.StandardJarScanner.scan(StandardJarScanner.java:234)
  at org.apache.jasper.servlet.TldScanner.scanJars(TldScanner.java:262)
  at org.apache.jasper.servlet.TldScanner.scan(TldScanner.java:104)
  at org.apache.jasper.servlet.JasperInitializer.onStartup(JasperInitializer.java:101)
  at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5154)
  at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
  at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1412)
  at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1402)
  at java.util.concurrent.FutureTask.run$$$capture(FutureTask.java:266)
  at java.util.concurrent.FutureTask.run(FutureTask.java)
  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
  at java.lang.Thread.run(Thread.java:748)


2021-05-18 08:52:43.930  WARN [-,,,] 11888 --- [ost-startStop-1] o.a.tomcat.util.scan.StandardJarScanner  : Failed to scan [file:/D:/repository/org/openoffice/jurt/4.1.2/unoloader.jar] from classloader hierarchy


java.io.FileNotFoundException: D:\repository\org\openoffice\jurt\4.1.2\unoloader.jar (系统找不到指定的文件。)
  at java.util.zip.ZipFile.open(Native Method)
  at java.util.zip.ZipFile.<init>(ZipFile.java:225)
  at java.util.zip.ZipFile.<init>(ZipFile.java:155)
  at java.util.jar.JarFile.<init>(JarFile.java:166)
  at java.util.jar.JarFile.<init>(JarFile.java:130)
  at org.apache.tomcat.util.compat.JreCompat.jarFileNewInstance(JreCompat.java:197)
  at org.apache.tomcat.util.scan.JarFileUrlJar.<init>(JarFileUrlJar.java:65)
  at org.apache.tomcat.util.scan.JarFactory.newInstance(JarFactory.java:49)
  at org.apache.tomcat.util.scan.StandardJarScanner.process(StandardJarScanner.java:385)
  at org.apache.tomcat.util.scan.StandardJarScanner.processURLs(StandardJarScanner.java:320)
  at org.apache.tomcat.util.scan.StandardJarScanner.doScanClassPath(StandardJarScanner.java:271)
  at org.apache.tomcat.util.scan.StandardJarScanner.scan(StandardJarScanner.java:234)
  at org.apache.jasper.servlet.TldScanner.scanJars(TldScanner.java:262)
  at org.apache.jasper.servlet.TldScanner.scan(TldScanner.java:104)
  at org.apache.jasper.servlet.JasperInitializer.onStartup(JasperInitializer.java:101)
  at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5154)
  at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
  at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1412)
  at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1402)
  at java.util.concurrent.FutureTask.run$$$capture(FutureTask.java:266)
  at java.util.concurrent.FutureTask.run(FutureTask.java)
  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
  at java.lang.Thread.run(Thread.java:748)

根据提示信息找到类StandardJarScanner，定位到

  if (isScanManifest()) {
    processManifest(jar, isWebapp, classPathUrlsToProcess);
  }

打开文件juh-4.1.2.jar

\META-INF\MANIFEST.MF

Manifest-Version: 1.0
Class-Path: ridl.jar jurt.jar ../../lib/ ../bin/
Solar-Version: 412m3(Build:9782)
Sealed: true
RegistrationClassName: com.sun.star.comp.JavaUNOHelperServices
UNO-Type-Path:

果然是扫描并尝试加载了MANIFEST.MF的Class-Path。

isScanManifest()通过属性scanManifest来控制是否扫描Manifest。

设置禁用扫描清单文件，

Spring Boot 1.x：

@Bean
  public EmbeddedServletContainerFactory embeddedServletContainerFactory() {
    return new TomcatEmbeddedServletContainerFactory() {
      @Override
      protected void postProcessContext(Context context) {
        ((StandardJarScanner) context.getJarScanner()).setScanManifest(false);
      }
    };
  }

Spring Boot 2.0：

  @Bean
    public TomcatServletWebServerFactory tomcatFactory() {
        return new TomcatServletWebServerFactory() {
            @Override
            protected void postProcessContext(Context context) {
                ((StandardJarScanner) context.getJarScanner()).setScanManifest(false);
            }
        };
    }

数据库

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禁用springboot内嵌tomcat的MANIFEST扫描

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