Hi Nigel, I think your analysis is correct. The issue is related to Spring Boot's support for SLF4J 2.0. The dependency tree [1] you provided shows several components which cater for SLF4J 1.7.x such as
org.apache.logging.log4j:log4j-to-slf4j:jar org.slf4j:jul-to-slf4j:jar:1.7.36 Spring Boot is slated to support SLF4J 2.0 sometime in the near future [2]. I hope this helps, -- Ceki Gülcü Sponsoring SLF4J/logback/reload4j at https://github.com/sponsors/qos-ch [1] https://github.com/odpi/egeria/issues/6884#issuecomment-1234136658 [2] https://github.com/spring-projects/spring-boot/issues/12649 On 9/1/2022 3:53 PM, Nigel L Jones wrote: > Ok, so that ref to ServiceLoader really helped, and I figured my issue > looks like > > https://github.com/spring-projects/spring-boot/issues/32182 > <https://github.com/spring-projects/spring-boot/issues/32182> > > So thanks for the tip! > > > > *From: *Nigel L Jones <[email protected]> > *Date: *Thursday, 1 September 2022 at 14:49 > *To: *logback users list <[email protected]> > *Subject: *Re: [EXTERNAL] Re: [logback-user] Logback 1.3.0/1.4.0 : > slf4j-api & StaticLoggerBinder > > Thanks, > I did try 1.3 with the same results. Mostly Jakarta, but some javax via > transitive dependencies. > > > The server applications use spring (springboot 2.7.3/spring 5.3.22), so > that may be the area to persue as spring introduces it’s own classloader > and may cause problems with ServiceLoader?? –via the spring community so > thanks for the pointer. > > > > *From: *logback-user <[email protected]> on behalf of Raymond > Augé <[email protected]> > *Date: *Thursday, 1 September 2022 at 14:15 > *To: *logback users list <[email protected]> > *Subject: *[EXTERNAL] Re: [logback-user] Logback 1.3.0/1.4.0 : slf4j-api > & StaticLoggerBinder > > Hi Nigel, You probably want logback 1. 3 (1. 4 is for Jakarta EE as > opposed to 1. 3 being for Java EE). Secondly, logback now uses > ServiceLoader to find "providers" so make sure any adjustments are made > to your classloading such that > > > *This Message Is From an External Sender * > > This message came from outside your organization. > > ZjQcmQRYFpfptBannerEnd > > Hi Nigel, > > > > You probably want logback 1.3 (1.4 is for Jakarta EE as opposed to 1.3 > being for Java EE). > > > Secondly, logback now uses ServiceLoader to find "providers" so make > sure any adjustments are made to your classloading such that that can work. > > > > Cheers > > > > On Thu, Sep 1, 2022 at 7:59 AM Nigel L Jones <[email protected] > <mailto:[email protected]>> wrote: > > Hi, > I’m a maintainer on the open source Egeria project > https://github.com/odpi/egeria <https://github.com/odpi/egeria>. > > > We typically use slf4j in our Java 11 code, and depend on > slf4j-api. Then in any ‘applications’ (a client tool, or a server) > we include an implementation for logging, such as logback – > specifically logback-classic > > We regularly update our dependencies and today I tried upgrading > from logback 1.2.11 to 1.4.0. On doing so I see we now fail to > startup, as slf4j is unable to find a logging implementation. Slf4j > is at 2.0.0. We get an exception > > Caused by: java.lang.NoClassDefFoundError: > org/slf4j/impl/StaticLoggerBinder > > > Whilst this is an slf4j config issue in most regards, I wonder if > the new logback version is not keeping slf4j happy with its > implementation in some way > > I opened up an issue in our own bug tracker at > https://github.com/odpi/egeria/issues/6884 > <https://github.com/odpi/egeria/issues/6884> which has the > dependency tree & stack trace in full. > > Is there a change in the new version that’s caught us out? Any > indications from the log? (If it is a logback issue happy to open up > a bug report, but now knowing logback well figured I’d ask here first!) > > Many thanks > Nigel Jones > > > > -- > > *Raymond Augé* (@rotty3000) > > Senior Software Architect *Liferay, Inc.* (@Liferay) > > OSGi Fellow, Java Champion > _______________________________________________ logback-user mailing list [email protected] http://mailman.qos.ch/mailman/listinfo/logback-user
