Iirc syntax changed between those versions. It's worth understanding how it works. Also look at any deprecations. I'm not sure what the converter does with those items.
God bless, Tim McManamey | IT Applications Developer/Senior INFORMATION SYSTEMS & TECHNOLOGY Nebraska Department of Health and Human Services OFFICE: 402-471-9091 DHHS.ne.gov | Facebook | Twitter | LinkedIn -----Original Message----- From: Alex Smith <a.sloni...@gmail.com> Sent: Monday, March 3, 2025 9:08 AM To: Log4J Users List <log4j-user@logging.apache.org> Subject: Re: Issues Migrating Log4J 1.27 to Log4j2 [You don't often get email from a.sloni...@gmail.com. Learn why this is important at https://aka.ms/LearnAboutSenderIdentification ] Addendum: For converting to the configuration files, I found some instructions on this page https://logging.apache.org/log4j/2.x/migrate-from-log4j1.html#configuration-file-migration related to running the command java org.apache.log4j.config.Log4j1ConfigurationConverter \ --in log4j.properties --out log4j2.xml but it does not provide instructions on where to run this. Trying to run it from terminal throws class not found exception log4j1configruationconverter, despite having the artifacts log4-api, log4j-core and log4j-1-2.api in the pom.xml. Thank you again, Alex On Mon, Mar 3, 2025 at 9:52 AM Alex Smith <a.sloni...@gmail.com> wrote: > Unfortunately, as this is an enterprise product, I can't share those > files. If there is specific information you are looking for from them, > I may be able to provide an excerpt with pertinent information > redacted/removed. > To the other questions, > Migrating to lo4j2 version 2.20.0 > Open JDK 17.0.14 > OS: Amazon Linux version 2023, ID like Fedora 2023 > > W/r/t the log4j configuration, it appears we're using multiple > log4j.xml files, some of which are log4j2 and otheru sing log4j, so I > don't think they have been converted. Is there a page I can reference > with instructions on how to convert those files? > > Thank you for the help, > Alex > > > On Sun, Mar 2, 2025 at 10:15 AM Volkan Yazıcı <vol...@yazi.ci> wrote: > >> Hey Alex, >> >> You're at the right place to ask Log4j-related questions. Would you >> mind providing a little bit more information about your setup, please? >> >> 1. Which Log4j 2 version are you migrating to? >> 2. Which OS and JDK distribution are you using? >> 3. Is this a standalone or a JEE/Jakarta application? >> 4. I presume you converted your Log4j 1 configuration to Log4j 2. Could >> you share your Log4j configuration? (e.g., `log4j2.xml`) >> 5. Could you share your `pom.xml` file? >> 6. Could you share your application logs when you start the application >> with the `log4j2.debug` system property? >> >> Kind regards. >> >> On Fri, Feb 28, 2025 at 8:03 PM Alex Smith <a.sloni...@gmail.com> wrote: >> >> > I'm not sure I'm in the right place, but I've been working on >> > migrating from Log4j to Log4j 2 in a project I'm working on. >> > >> > In the pom.xml, I removed the log4j dependencies and added the >> > log4j compatibility API to hte dependencies. I think some of of the >> > other dependencies I'm using may still be on log4j 1.2, but am not >> > 100% >> certain >> > of this. >> > >> > What I'm observing is that trying to add import >> > org.apache.logging.logj4.x is frequently throwing errors related >> to >> > ClassNotFoundException, and when attempt to build some of the >> > services, >> I >> > get amongst others, the following errors >> > >> > "StatusLogger Log4j2 could not find a logging implementation please >> > add log4j-core to the classpath... " >> > and >> > "Invocation of init method failed; nested exception is >> > java.lang.NoClassDefFoundError: org/apache/logging/log4j/core/logEvent" >> > >> > As mentioned above, log4j-core is listed as a dependency in the >> > pom.xml file, so I can't imagine why the files wouldn't be found in >> > the >> classpath. >> > >> > I've been following the instructions from >> > https://l/ >> > ogging.apache.org%2Flog4j%2F2.x%2Fmigrate-from-log4j1.html&data=05% >> > 7C02%7CTim.McManamey%40nebraska.gov%7Cd035044d04c348193c1408dd5a653 >> > d62%7C043207dfe6894bf6902001038f11f0b1%7C0%7C0%7C638766113045558061 >> > %7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMC >> > IsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sda >> > ta=0wKIK6z41zPF9fZHygKOg7Pf9LKFKVm%2FyyWCOkJ3Od8%3D&reserved=0, and >> > am struggling to find any information as to why the errors listed >> > above >> might >> > be caused. If anyone has any insight on this or how to potentially >> resolve >> > it, I'd be extremely grateful. >> > >> > I think I've supplied all the relevant information, but if there's >> anything >> > I'm missing I can easily look into it and provide whatever I find. >> > >> > Thanks, >> > Alex >> > >> >
