NIO Thread Madness
Hi, I am running Apache Tomcat 9.0.97 on Windows Server 2022. I’m running Oracle JDK 1.8.0_371-b11 with a 4GB min heap and a 16GB max heap. I have an application deployed on this server that is hitting an Oracle database server. I have noticed the server stops accepting requests after about 8-12 hours of uptime. In JProfiler you can tell when this is about to happen because 20 of the 150 NIO threads BRIEFLY…BRIEFLY go into a blocked state while querying the database. After this situation clears up, the NIO thread pool grows slightly by about 15-20 threads, and then the application server stops serving requests. I looked at the GC log, and it looks completely healthy, and we are not even close to our max heap. Metaspace size is not configured, but it looks fine from the GC logs. There is no crash file or core dump produced. I do notice some Oracle exceptions in the logs when this happens. We do have about 1000 max connections defined on the Oracle database (which is too many). I have my thread pool defined as follows in server.xml: … … Are there any logs I can enable to find out why the application server stops accepting connections? Regards, William Crowell This e-mail may contain information that is privileged or confidential. If you are not the intended recipient, please delete the e-mail and any attachments and notify us immediately.
Re: Verifying tomcat downloads: PGP keys unavailable at https://keys.openpgp.org
Il 20/03/25 17:16, Christopher Schultz ha scritto: Roberto, On 3/20/25 7:52 AM, Roberto Resoli wrote: Il 19/03/25 20:48, Mark Thomas ha scritto: On 19/03/2025 18:51, Mark Thomas wrote: ... So the signing fingerprint may not be the same of that of the principal key as metioned in the KEYS file. Correct. If the community would like me to do so, I can put the subkey into the KEYS file as well. Imho this is not needed; a correct the verification procedure (import key, verify signature) shows clearly which is the signing key. One should not rely on the correspondance of the mentioned fingerprint alone, without importing the key. ... Generally, I'd recommend obtaining keys for ASF releases from the associated KEYS file for that release. We watch all commits carefully but any changes to the KEYS files get looked at very closely. I view the key servers as less reliable as there have been fake keys in my name uploaded in the past and I am not convinced it is no longer possible. Yes; I guess that usual check of the signatures of the key by others (the web of trust) remains the main criterion. +1 I and others attempt to participate in PGP keysigning exercises at any ASF events we attend. During those exercises, we confirm exact key signatures (to avoid signing fake or malicious keys uploaded by others), confirm identities (typically using a government-issued form of identity such as a passport), and sign each others keys. This is fine! So while some people will sign a key based upon minimal authentication criteria (e.g. I downloaded the key from a key server and signed it because I recognized the person's email address), ASF committers will (almost?) never do that. I personally have never signed the key of someone I had not met in person as described above. Great. Thank you -rob -chris - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Community over Code North America 2025 Call for Presentations is OPEN
All, Anyone who has ever considered doing a presentation at a Community over Code Conference (formerly ApacheCon), please head over to the Call for Presentations page and submit a proposal: https://communityovercode.org/call-for-presentations/ You do NOT need to have anything ready to submit a proposal. You do NOT need to be committer, etc. to submit a proposal. We would very much like to have submissions from "the community" (that's YOU)! For inspiration, you may want to look at the list of presentations from previous events: https://tomcat.apache.org/presentations.html -chris - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
