https://bz.apache.org/bugzilla/show_bug.cgi?id=63487
Bug ID: 63487
Summary: WsSessionListener does not implement
HttpSessionListener.sessionCreated
Product: Tomcat 9
Version: 9.0.17
Hardware: PC
OS: Linux
Status: NEW
Severity: regression
Priority: P2
Component: Servlet
Assignee: dev@tomcat.apache.org
Reporter: trevin.beat...@gigsternetwork.com
Target Milestone: -----
Our application is logging the following exception repeatedly:
java.lang.AbstractMethodError:
org.apache.tomcat.websocket.server.WsSessionListener.sessionCreated(Ljavax/servlet/http/HttpSessionEvent;)V
at
org.apache.catalina.session.StandardSession.tellNew(StandardSession.java:388)
at org.apache.catalina.session.StandardSession.setId(StandardSession.java:360)
at org.apache.catalina.session.StandardSession.setId(StandardSession.java:341)
at org.apache.catalina.session.ManagerBase.createSession(ManagerBase.java:686)
at org.apache.catalina.connector.Request.doGetSession(Request.java:3027)
…
This does not appear to impact the usability of the application, but it is
generating a lot of output to the log file and we are running into issues with
disk space. I checked the source code, and found that while WsSessionListener
claims to implement javax.servlet.http.HttpSessionListener, it does not
implement the sessionCreated method.
In Tomcat 8.5, sessionCreated WAS implemented (as a no-op).
I don’t see how WsSessionListener could have compiled without implementing all
of HttpSessionListener’s methods, but that is what’s causing the
AbstractMethodError.
I checked versions 9.0.20 and 9.0.1 of the source code as well, and it appears
neither HttpSessionListener.java nor WsSessionListener.java have changed in all
those revisions.
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