[slf4j-user] java.lang.NoSuchMethodError: org.slf4j.spi.LocationAwareLogger.log

[Strachan, Paul]

Hi,

I'm creating a Groovy/JavaFX app which invokes an ant build script from a 3rd party software product installed on the same host. My app (Griffon) has a runtime dependency of slf4j-log4j12-1.7.10.   I've also added ant-1.9.4 as a compile dependency.

The ant build file imports other build scripts (from the 3rd party "scripts" folder) which import others and eventually the necessary taskdef and classpath refs are created - this classpath uses an older slf4j implantation containing: jcl-over-slf4j-1.5.2.jar, slf4j-log4j12-1.5.2.jar, slf4j-api-1.5.2.jar

At runtime when I execute the target I'm seeing the following error and the ant task did not complete:

def antProject = new Project()
antProject.init()
ProjectHelper.configureProject(antProject, buildFile)

antProject.executeTarget('export')


Caused by: java.lang.NoSuchMethodError: org.slf4j.spi.LocationAwareLogger.log(Lorg/slf4j/Marker;Ljava/lang/String;ILjava/lang/String;Ljava/lang/Throwable;)V
        at org.apache.commons.logging.impl.SLF4JLocationAwareLog.warn(SLF4JLocationAwareLog.java:173)
        at org.apache.axis2.util.Loader.getResourceAsStream(Loader.java:140)
        at org.apache.axis2.deployment.FileSystemConfigurator.getAxisConfiguration(FileSystemConfigurator.java:113)
        at org.apache.axis2.context.ConfigurationContextFactory.createConfigurationContext(ConfigurationContextFactory.java:68)
        at org.apache.axis2.context.ConfigurationContextFactory.createConfigurationContextFromFileSystem(ConfigurationContextFactory.java:184)
        at org.apache.axis2.client.ServiceClient.configureServiceClient(ServiceClient.java:150)
        at org.apache.axis2.client.ServiceClient.<init>(ServiceClient.java:143)
        at org.apache.axis2.client.ServiceClient.<init>(ServiceClient.java:244)
        at org.apache.axis2.rpc.client.RPCServiceClient.<init>(RPCServiceClient.java:48)
        at com.tibco.amf.admin.api.servicefactory.remote.axis2.Axis2ProxyServiceFactory$Axis2ServiceInvocation.<init>(Axis2ProxyServiceFactory.java:185)
        at com.tibco.amf.admin.api.servicefactory.remote.axis2.Axis2ProxyServiceFactory.createService(Axis2ProxyServiceFactory.java:168)
        at com.tibco.amf.admin.api.servicefactory.remote.RemoteServicesRegistry.getRemoteServiceInstance(RemoteServicesRegistry.java:112)
        at com.tibco.amf.admin.cmdline.ServiceFactory.createService(ServiceFactory.java:196)
        at com.tibco.amf.admin.cmdline.CLIRegistry.getService(CLIRegistry.java:181)
        at com.tibco.amf.admin.cmdline.Processor.process(Processor.java:104)
        at com.tibco.amf.admin.cmdline.Processor.processChildren(Processor.java:39)
        at com.tibco.amf.admin.cmdline.ant.AMXAdminTask.process(AMXAdminTask.java:362)
        at com.tibco.amf.admin.cmdline.ant.AMXAdminTask.execute(AMXAdminTask.java:280)
        at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:292)
        at sun.reflect.GeneratedMethodAccessor26.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:497)
        at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
        ... 35 more
[2015-05-07 14:46:39,063] [JavaFX Application Thread] INFO  griffon.javafx.JavaFXGriffonApplication - Shutdown is in process

My build.gradle
...
dependencies {
    griffon 'org.codehaus.griffon.plugins:griffon-miglayout-plugin:1.1.1'
    compile "org.codehaus.griffon:griffon-guice:${griffon.version}"
    //compile 'org.apache.ant:ant:1.9.4'
    compile('org.apache.ant:ant-apache-log4j:1.9.4') {
        exclude group: 'log4j',         module: 'log4j'
    }

    runtime('log4j:log4j:1.2.17') {
        exclude group: 'ant',         module: 'ant-nodeps'
        exclude group: 'ant',         module: 'ant-junit'
        exclude group: 'ant-contrib', module: 'ant-contrib'
    }
                runtime 'org.slf4j:slf4j-log4j12:1.7.10'
                //runtime 'org.slf4j:slf4j-jcl:1.7.10'
                //runtime 'org.slf4j:jcl-over-slf4j:1.7.10'
                runtime 'commons-logging:commons-logging:1.1.1'
                runtime 'org.apache.ant:ant-commons-logging:1.9.4'

    testCompile 'org.spockframework:spock-core:0.7-groovy-2.0'
    testCompile 'com.jayway.awaitility:awaitility-groovy:1.6.3'
}
...

My interpretation of this exception  is:

1.       SLF4JLocationAwareLog has been loaded  from slf4j<1.6 (i.e. jcl-over-slf4j-1.5.2.jar)

2.       LocationAwareLogger has been loaded from slf4j>=1.6 (i.e. slf4j-api-1.7.10.jar)

3.       I understand that slf4j isn't binary compatible between 1.5 and 1.6 - and doesn't like >1 binding on the classapath

What I don't understand is if my Griffon/Gradle build project contains { runtime 'org.slf4j:slf4j-log4j12:1.7.10' } this means I've fulfilled slf4j's requirement by providing the slf4j api and log4j12 binding.

So ant's taskdef classpath contains the 1.5.2 API - but I can't change these scripts
For some reason slf4j picks jcl-over-slf4j-1.5.2 (the other choice being slf4j-log4j12-1.5.2)  even though a binding has already been defined/loaded/used.
In the interim I can "make the error go away" by:


a)      Comment out runtime 'org.slf4j:slf4j-log4j12:1.7.10' - meaning no logging / noop?

b)      Comment in runtime 'org.slf4j:jcl-over-slf4j:1.7.10' - (I don't really want JCL)


I'm running out of ideas- do I need to dig into the ant code & try and change the classpath (remove 1.7.10?) I don't know if that would work if classes from 1.7.10 have already been loaded - I'm hoping there's a really simple solution I've just happened to overlook (like executing ant in a new process with a new classloader) but if anyone has a suggestion it would be appreciated.

Cheers,
Paul







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