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From bugzi...@apache.org
Subject [Bug 62792] New: Race condition NullpointerException in JspServletWrapper
Date Tue, 02 Oct 2018 09:13:04 GMT
https://bz.apache.org/bugzilla/show_bug.cgi?id=62792

            Bug ID: 62792
           Summary: Race condition NullpointerException in
                    JspServletWrapper
           Product: Tomcat 9
           Version: 9.0.12
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Jasper
          Assignee: dev@tomcat.apache.org
          Reporter: julien@beti.name
  Target Milestone: -----

We do have the following NullPointerException in Tomcat 9.0.12 in production
mode, with checkinterval:

java.lang.NullPointerException
org.apache.jasper.JasperException: java.lang.NullPointerException
        at
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:498)
        at
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:386)
        at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:330)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
        at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
        at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
        at
org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:712)
        at
org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:580)
        at
org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:516)
        at
org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:868)

This issue seems to have been introduced by bug 62603, where getServlet can now
return null.

getReloadInternal seems to return false without theServlet being properly
initialized.

It seems it can occurs if firstTime is false, reload is true and
ctxt.getRuntimeContext().isCompileCheckInProgress() is true.

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