系统找不到：mchange-commons-java-0.2.11

Question

我有一个使用连接池的 Spring 启动项目。它在我的电脑上正常工作，但是当我的同事从 git 中提取代码然后尝试运行时。它抛出了如下错误：

2018-02-28 14:49:24.527  WARN 11856 --- [ost-startStop-1] o.a.tomcat.util.scan.StandardJarScanner  : Failed to scan [file:/C:/Users/ABC/.m2/repository/com/mchange/c3p0/0.9.5.2/mchange-commons-java-0.2.11.jar] from classloader hierarchy

java.io.FileNotFoundException: C:\Users\ABC\.m2\repository\com\mchange\c3p0\0.9.5.2\mchange-commons-java-0.2.11.jar (The system cannot find the file specified)
at java.util.zip.ZipFile.open(Native Method) ~[na:1.8.0_60]
at java.util.zip.ZipFile.<init>(ZipFile.java:219) ~[na:1.8.0_60]
at java.util.zip.ZipFile.<init>(ZipFile.java:149) ~[na:1.8.0_60]
at java.util.jar.JarFile.<init>(JarFile.java:166) ~[na:1.8.0_60]
at java.util.jar.JarFile.<init>(JarFile.java:130) ~[na:1.8.0_60]
at org.apache.tomcat.util.scan.JarFileUrlJar.<init>(JarFileUrlJar.java:60) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.tomcat.util.scan.JarFactory.newInstance(JarFactory.java:49) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.tomcat.util.scan.StandardJarScanner.process(StandardJarScanner.java:338) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.tomcat.util.scan.StandardJarScanner.scan(StandardJarScanner.java:288) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.jasper.servlet.TldScanner.scanJars(TldScanner.java:262) [tomcat-embed-jasper-8.5.23.jar:8.5.23]
at org.apache.jasper.servlet.TldScanner.scan(TldScanner.java:104) [tomcat-embed-jasper-8.5.23.jar:8.5.23]
at org.apache.jasper.servlet.JasperInitializer.onStartup(JasperInitializer.java:101) [tomcat-embed-jasper-8.5.23.jar:8.5.23]
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5196) [tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) [tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1419) [tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1409) [tomcat-embed-core-8.5.23.jar:8.5.23]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [na:1.8.0_60]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_60]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_60]
at java.lang.Thread.run(Thread.java:745) [na:1.8.0_60]

我还尝试为mchange-commons-java-0.2.11添加依赖项，但它仍然不起作用：

<dependency>
    <groupId>com.mchange</groupId>
    <artifactId>mchange-commons-java</artifactId>
    <version>0.2.11</version>
</dependency>

如果您遇到或有过相关经验，请给我一个评论/想法。

您的意见或建议将不胜感激和欢迎！

Answer 1

来自StandardJarScanner javadoc：

默认的 JarScanner 实现扫描 WEB-INF/lib目录，然后是提供的类加载器，然后处理类加载器层次结构。此实现足以满足 Servlet 3.0 规范的要求，并提供许多 Tomcat 特定的扩展。扩展名是：

• 扫描类加载器层次结构（默认启用）测试所有文件以查看它们是否为 JAR（默认禁用）

• 测试所有目录以查看它们是否是分解的 JAR（默认禁用）

• 所有的扩展都可以通过配置来控制。

要在启动时禁止扫描该特定 jar，您可以添加此 Spring Boot 特定属性：

server.tomcat.additional-tld-skip-patterns=*mchange-commons-java*.jar