Thanks a lot for your comments, Chuck! On Fri, Jan 17, 2025 at 3:51 PM Chuck Caldarale <n82...@gmail.com> wrote: > > > > On Jan 17, 2025, at 04:05, Michael <eftern...@gmail.com> wrote: > > > > I have two applications, A and B, running in Tomcat 10.1.28 on RHEL > > 8.10 with Java 21 (OpenJDK Runtime Environment Red_Hat-21.0.5.0.10-1). > > > You may want to try a newer version of 10.1; there have been several changes > to the Catalina and Coyote components in the nearly six months since 10.1.28 > was released.
We will definitely try that soon. I should perhaps have mentioned that the problem with the NPE in app A affecting requests to app B, that problem can be reproduced in 10.1.34. > > In various logs from nightly(?) Tomcat test runs, I've been able to > > find a similar problem. See this, for instance: > > https://nightlies.apache.org/tomcat/tomcat-10.1.x/logs/1309/TEST-org.apache.coyote.http2.TestAsyncError.NIO.txt > > > I believe that the test referred to above intentionally causes the error. Okay, that sounds plausible. It surprises me, though, that it's okay to provoke a NPE from the application code, but again, I'm no expert in this :-) Also, it seems that the error is sporadic in this log and logs from other tests. > > Now, the next thing that happens is even more surprising to me. > > Sometimes the uncaught NPE triggers an HTTP 500 response on a request > > to a servlet in application B! This I've been able to reproduce in my > > development environment, if I simply throw an NPE in application A > > from withing the AsyncContext as shown in the stacktrace above while I > > simultaneously keep requests coming in to application B. > > > This sounds suspiciously like the application is keeping references to > requests or responses that have already been committed and recycled. Can you > post your <Connector> configuration? In particular, what are the settings for > the discardFacades and discardRequestsAndResponses attributes? > The setup has defaults for those attributes, I guess. This is the connector config: <Connector port="8080" protocol="org.apache.coyote.http11.Http11NioProtocol" connectionTimeout="190000" maxConnections="10000" maxThreads="2000" acceptCount="1000" URIEncoding="UTF-8" compression="1024" compressibleMimeType="text/html,text/xml,text/plain,text/tcl,text/css,application/javascript,application/json,application/xml" redirectPort="8443" maxParameterCount="1000"/> I haven't looked at why the various attributes are set like this. The connectionTimeout looks much too high to me, but I wouldn't expect that to have anything to do with the problem. /Michael --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
