是什么原因导致了；失败-部署上载失败，异常：null“；tomcat中的错误消息？

是什么导致tomcat中出现“FAIL-Deploy Upload Failed，Exception:null”错误消息

我试图从管理器向tomcat部署war，但当我尝试上载时，我得到了错误

FAIL - Deploy Upload Failed, Exception: null

在日志中显示以下错误消息

SEVERE: HTMLManager: FAIL - Deploy Upload Failed, Exception: null
java.lang.NullPointerException
    at org.apache.commons.fileupload.DefaultFileItem.write(DefaultFileItem.java:442)
    at org.apache.catalina.manager.HTMLManagerServlet.doPost(HTMLManagerServlet.java:211)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:524)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
    at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
    at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
    at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
    at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
    at java.lang.Thread.run(Thread.java:619)

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我认为您的访问权限有问题——除非Tomcat以root身份运行，否则我认为这会更糟。否则，Tomcat用户将需要rw访问其

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webapp dir（并且应该拥有它）可以解包任何东西。

谢谢，这是我可以研究的东西！我设法通过用新版本覆盖现有上下文中的文件来绕过它