WSO2 maintains a separate version for slf4j to make it an OSGi bundle. See [1]. Since Carbon runs on OSGi container, all JARs need to be OSGi bundles.
Cartridge Agent is just a simple Java program and it's okay to exclude the wso2 version of slf4j. I hope this helps. Thanks! [1] http://maven.wso2.org/nexus/content/repositories/wso2maven2/slf4j/wso2/slf4j/1.5.10.wso2v1/slf4j-1.5.10.wso2v1.pom On Thu, Jul 17, 2014 at 10:52 AM, Jeffrey Nguyen (jeffrngu) < jeffr...@cisco.com> wrote: > > Thank you Isuru for the pointer. I was able to modify the file you > mentioned and confirmed cartridge agent zip file doesn't have the wso2 > version of slf4j. > > When we removed this jar file, we fixed the issue of spawned VM not > converging to active. However, logging for cartridge agent stopped > working. Martin in our team seems to have found a work-around to get > logging working again. However, given you mentioned this jar file is part > of core carbon components, is it safe to remove it from cartridge agent? > I suppose the wso2 version of slf4j was customized for some good reason > right? > We just want to make sure nothing within cartridge agent depends on wso2 > slf4j. > > -Jeffrey > > From: Isuru Haththotuwa <isu...@apache.org> > Reply-To: "dev@stratos.apache.org" <dev@stratos.apache.org> > Date: Wednesday, July 16, 2014 9:27 PM > To: dev <dev@stratos.apache.org> > Subject: Re: Multiple versions of slf4j used in Stratos > > Hi Jeffrey, > > The slf4j 1.5.10.wso2v1 jar seems to be coming from the core carbon kernel > components. Therefore, its not possible to remove it from the build. Since > you have mentioned that manually removing it resolved the issue, you can > exclude it from the cartridge agent build and test if the issue is > resolved. To do this, please add an exclusion condition to [1], in the > dependencySets element in your local build. There are some existing > exclusions that you can refer to. > > [1]. > products/cartridge-agent/modules/distribution/src/main/assembly/bin.xml > > > On Tue, Jul 15, 2014 at 8:51 PM, Jeffrey Nguyen (jeffrngu) < > jeffr...@cisco.com> wrote: > >> Changed subject… >> >> Hi Devs, >> >> Anybody has any pointers/suggestions on how to fix this issue with >> multiple versions of slf4j library? We found this dependency problem in >> cartridge agent. Not sure if this affects any other components in Stratos. >> >> Thanks, >> -Jeffrey >> >> From: jeffrngu <jeffr...@cisco.com> >> Reply-To: "dev@stratos.apache.org" <dev@stratos.apache.org> >> Date: Monday, July 14, 2014 7:21 PM >> To: "dev@stratos.apache.org" <dev@stratos.apache.org> >> Subject: Re: cartridge agent startup error (4.0.0 based source, local >> build) >> >> Hi Devs, >> >> Just wanted to follow up on this issue. We've confirmed that removing >> apache-stratos-cartridge-agent-4.0.0/lib/slf4j-1.5.10.wso2v1.jar fixed >> this issue. We're trying to see where this dependency is configured. I >> found the references to slf4j in [1], [2], and [3] in our code base. I >> assume [1] and [2] are auto-generated during maven build. >> >> Any idea which config file controls contents of [1] and [2]? >> >> I also see that Stratos CLI code uses slf4j version 1.7.6 while cloud >> controller, load balancer and the rest uses version 1.6.4. Should we try >> to ensure all Stratos components references the same version of sl4j? If >> so, how? >> >> >> 1/- >> products/stratos/modules/p2-profile-gen/target/wso2carbon-core-4.2.0/repository/components/default/configuration/org.eclipse.equinox.simpleconfigurator/ >> bundles.info >> slf4j,1.5.10.wso2v1,../plugins/slf4j_1.5.10.wso2v1.jar,4,true >> >> 2/- >> components/org.apache.stratos.cartridge.agent/target/maven-shared-archive-resources/META-INF/DEPENDENCIES >> - slf4j.wso2 (http://wso2.org) slf4j.wso2:slf4j:bundle:1.5.10.wso2v1 >> >> 3/- components/org.apache.stratos.cartridge.agent/pom.xml >> <dependency> >> <groupId>org.slf4j</groupId> >> <artifactId>slf4j-log4j12</artifactId> >> <version>1.7.5</version> >> </dependency> >> >> Thanks, >> -Jeffrey >> >> From: "Martin Eppel (meppel)" <mep...@cisco.com> >> Reply-To: "dev@stratos.apache.org" <dev@stratos.apache.org> >> Date: Sunday, July 13, 2014 12:03 PM >> To: "dev@stratos.apache.org" <dev@stratos.apache.org> >> Cc: "d...@stratos.incubator.apache.org" <d...@stratos.incubator.apache.org> >> Subject: RE: cartridge agent startup error (4.0.0 based source, local >> build) >> >> We merged our local changes which (were working and based on rc4), >> with 4.0.0 and now we are seeing this issue. Did we change library versions >> (used by cartridge agent) between rc4 and 4.0.0 ? Which pom files define >> all the cartridge agent dependencies ? >> >> >> >> Thanks >> >> >> >> Martin >> >> >> >> *From:*isu...@wso2.com [mailto:isu...@wso2.com <isu...@wso2.com>] *On >> Behalf Of *Isuru Haththotuwa >> *Sent:* Sunday, July 13, 2014 7:21 AM >> *To:* dev >> *Cc:* d...@stratos.incubator.apache.org >> *Subject:* Re: cartridge agent startup error (4.0.0 based source, local >> build) >> >> >> >> Hi Martin, >> >> I have not seen this, but a Google search tells me what you thought is >> correct. There are different versions of API and Integration libraries. Do >> you have any local changes? If so, please check in those classes if there >> are any imports related to a different version of SL4J. >> >> >> >> On Sun, Jul 13, 2014 at 3:46 PM, Martin Eppel (meppel) <mep...@cisco.com> >> wrote: >> >> We are getting an error when the cartridge agent is starting, looks like >> the (local) build it is pulling 2 different versions of SLF4J (see >> exception below) when the cartridge zip file is generated which causes an >> incompatibility, has anyone else seen this ? >> >> Any idea what's causing it and how to resolve it ? >> >> Thanks >> >> Martin >> >> >> log4j:WARN Please initialize the log4j system properly. >> SLF4J: Class path contains multiple SLF4J bindings. >> SLF4J: Found binding in >> [jar:file:/opt/apache-stratos-cartridge-agent-4.0.0/lib/slf4j-1.5.10.wso2v1.jar!/org/slf4j/impl/StaticLoggerBinder.class] >> SLF4J: Found binding in >> [jar:file:/opt/apache-stratos-cartridge-agent-4.0.0/lib/slf4j-log4j12-1.7.5.jar!/org/slf4j/impl/StaticLoggerBinder.class] >> SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an >> explanation. >> log4j:WARN Please initialize the log4j system properly. >> SLF4J: Class path contains multiple SLF4J bindings. >> SLF4J: Found binding in >> [jar:file:/opt/apache-stratos-cartridge-agent-4.0.0/lib/slf4j-1.5.10.wso2v1.jar!/org/slf4j/impl/StaticLoggerBinder.class] >> SLF4J: Found binding in >> [jar:file:/opt/apache-stratos-cartridge-agent-4.0.0/lib/slf4j-log4j12-1.7.5.jar!/org/slf4j/impl/StaticLoggerBinder.class] >> SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an >> explanation. >> "/var/log/apache-stratos/cartridge-agent.log" 48L, 5449C >> 1,1 Top >> at >> org.apache.activemq.transport.AbstractInactivityMonitor.onException(AbstractInactivityMonitor.java:310) >> at >> org.apache.activemq.transport.TransportSupport.onException(TransportSupport.java:96) >> at >> org.apache.activemq.transport.tcp.TcpTransport.run(TcpTransport.java:200) >> at java.lang.Thread.run(Thread.java:745) >> Exception in thread "Thread-3" java.lang.NoSuchMethodError: >> org.slf4j.helpers.MessageFormatter.format(Ljava/lang/String;Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/String; >> at >> org.slf4j.impl.Log4jLoggerAdapter.debug(Log4jLoggerAdapter.java:246) >> at >> org.apache.activemq.thread.TaskRunnerFactory.init(TaskRunnerFactory.java:91) >> at >> org.apache.activemq.thread.TaskRunnerFactory.execute(TaskRunnerFactory.java:149) >> at >> org.apache.activemq.thread.TaskRunnerFactory.execute(TaskRunnerFactory.java:145) >> at >> org.apache.activemq.transport.tcp.TcpTransport.doStop(TcpTransport.java:538) >> at >> org.apache.activemq.util.ServiceSupport.stop(ServiceSupport.java:71) >> at >> org.apache.activemq.transport.tcp.TcpTransport.stop(TcpTransport.java:582) >> at >> org.apache.activemq.transport.AbstractInactivityMonitor.stop(AbstractInactivityMonitor.java:145) >> at >> org.apache.activemq.transport.TransportFilter.stop(TransportFilter.java:65) >> at >> org.apache.activemq.transport.WireFormatNegotiator.stop(WireFormatNegotiator.java:91) >> at >> org.apache.activemq.transport.TransportFilter.stop(TransportFilter.java:65) >> at >> org.apache.activemq.transport.TransportFilter.stop(TransportFilter.java:65) >> at >> org.apache.activemq.transport.ResponseCorrelator.stop(ResponseCorrelator.java:132) >> at >> org.apache.activemq.util.ServiceSupport.dispose(ServiceSupport.java:43) >> at >> org.apache.activemq.ActiveMQConnection.close(ActiveMQConnection.java:725) >> at >> org.apache.stratos.messaging.broker.connect.TopicConnector.close(TopicConnector.java:86) >> at >> org.apache.stratos.messaging.broker.subscribe.TopicSubscriber.run(TopicSubscriber.java:157) >> at java.lang.Thread.run(Thread.java:745) >> >> -- >> >> Thanks and Regards, >> >> Isuru H. >> >> +94 716 358 048 >> >> -- >> <%2B94%20716%20358%20048> >> <%2B94%20716%20358%20048> >> Thanks and Regards, >> >> Isuru H. >> <%2B94%20716%20358%20048> >> +94 716 358 048* <http://wso2.com/>* >> >> >> * <http://wso2.com/>* >> >> >> -- Isuru Perera Senior Software Engineer | WSO2, Inc. | http://wso2.com/ Lean . Enterprise . Middleware about.me/chrishantha
