https://bz.apache.org/bugzilla/show_bug.cgi?id=61289
Bug ID: 61289
Summary: NullPointerException in
Response.generateCookieString()
Product: Tomcat 8
Version: 8.5.16
Hardware: PC
OS: Linux
Status: NEW
Severity: major
Priority: P2
Component: Connectors
Assignee: dev@tomcat.apache.org
Reporter: matthias.kel...@ergon.ch
Target Milestone: ----
Sometimes (about every third try) we get a NullPointerException within the
connector when trying to write an empty, expired Cookie under Tomcat 8.5.13 and
8.5.16. This problem doesn't occur on Tomcat 7.0.77.
The stacktrace (from 8.5.13) is as follows:
org.apache.catalina.connector.Response.generateCookieString(Response.java:999)
org.apache.catalina.connector.Response.addCookie(Response.java:947)
org.apache.catalina.connector.ResponseFacade.addCookie(ResponseFacade.java:386)
javax.servlet.http.HttpServletResponseWrapper.addCookie(HttpServletResponseWrapper.java:58)
javax.servlet.http.HttpServletResponseWrapper.addCookie(HttpServletResponseWrapper.java:58)
javax.servlet.http.HttpServletResponseWrapper.addCookie(HttpServletResponseWrapper.java:58)
The code leading to it is:
Cookie c = new Cookie(cookieName, "");
c.setMaxAge(0);
cookie.setPath(contextPath);
response.addCookie(cookie);
We use the LegacyCookieProcessor via tomcat's context.xml:
<CookieProcessor className="org.apache.tomcat.util.http.LegacyCookieProcessor"
/>
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