Cannot import org/apache/commons/logging/LogFactory as Plugin

[Clive_Stewart]

In my bundle whenever a log is created, for example on 

DefaultHttpClient httpClient = new DefaultHttpClient();

I get org.apache.sling.api.scripting.ScriptEvaluationException: javax.servlet.ServletException: java.lang.NoClassDefFoundError: org/apache/commons/logging/LogFactory

I have created a bundle from commons-logging-1.2.jar. But I still get the NoClassDefFoundError  org/apache/commons/logging/LogFactory

This is the bundle information

CustomLoggerCustomLogger

                                     

Symbolic Name	CustomLogger
Version	1.0.0
Bundle Location	inputstream:CustomLogger_1.0.0.jar
Last Modification	Thu Oct 30 12:48:18 CAT 2014
Start Level	20
Bundle Classpath	.
Exported Packages	org.apache.commons.logging.impl,version=0.0.0
Imported Packages	org.apache.commons.logging,version=1.1.1 from jcl.over.slf4j (2)
Manifest Headers	Bundle-ClassPath: . Bundle-ManifestVersion: 2 Bundle-Name: CustomLogger Bundle-RequiredExecutionEnvironment: JavaSE-1.7 Bundle-SymbolicName: CustomLogger Bundle-Version: 1.0.0 Export-Package: org.apache.commons.logging, org.apache.commons.logging.impl Import-Package: org.apache.commons.logging Manifest-Version: 1.0

Regards

Clive

[justin_at_adobe · Accepted solution]

Commons Logging is supported out of the box (it is actually one of 6 different Logging APIs supported). You should not deploy Commons Logging separately. That will only make things confusing. You should uninstall that bundle you created ASAP.

The problem would appear to be that the bundle which includes DefaultHttpClient isn't importing org.apache.commons.logging.

Justin

[Clive_Stewart]

Thank you for your quick response.

I will uninstall and do as you say.

Kind Regards

Clive

[Clive_Stewart]

I have done as above. I also place 

protected final Logger log = LoggerFactory.getLogger(this.getClass());

Inside my class and

    public FetchStores(Integer countryId) throws Exception {
        url = "http://externalservices.shopriteholdings.co.za/production/legacy/storelocator/datarite/Locations/?$f..."
                + countryId + "&$format=json";
        fetchStore();
    }

    private String getConnection() throws IOException, IOException {
        String output = "";
        try {
            DefaultHttpClient httpClient = new DefaultHttpClient();
        } catch (Exception e) {
            log.info("CQ ERROR: "+e.getMessage()); 
        }

But on DefaultHttpClient httpClient = new DefaultHttpClient(); I get 

org.apache.sling.api.SlingException: javax.servlet.ServletException: java.lang.NoClassDefFoundError: org/apache/commons/logging/LogFactory

[justin_at_adobe]

What versions of the httpclient and httpcore bundles have you deployed? Can you confirm that you are *not* embedding these libraries and instead using the bundles?

[Prakash_CQ]

I am also facing same issue, I am using 4.1 version of httpclient and httpcore. 

[MPRobertson]

I am seeing this same issue.  My servlet can log fine.  However, within HTTPClient those classes are trying to log and failing with below error:

I have built OSGI fragment with HTTP client and deploy to AEM OSGI bundles.  I have tried a few versions of HttpClient, but all are hitting the same error.

Please help?  Any ideas?

01.05.2015 16:15:54.294 *ERROR* [0:0:0:0:0:0:0:1 [1430514954291] GET /bin/VOTServlet HTTP/1.1] org.apache.sling.engine.impl.SlingRequestProcessorImpl service: Uncaught Throwable

java.lang.NoClassDefFoundError: org/apache/commons/logging/LogFactory

    at org.apache.http.impl.client.AbstractHttpClient.<init>(AbstractHttpClient.java:182)

    at org.apache.http.impl.client.DefaultHttpClient.<init>(DefaultHttpClient.java:150)

    at com.gm.oc.aem.oc_aem.core.impl.servlets.VOTServlet.postAccessToken2(VOTServlet.java:139)

    at com.gm.oc.aem.oc_aem.core.impl.servlets.VOTServlet.doGet(VOTServlet.java:109)

[smacdonald2008]

Writing to the AEM log file from an OSGi bundle can be done using org.slf4j.Logger and org.slf4j.LoggerFactory Java packages. See this community article where output from the OSGi is written in the log file:

http://helpx.adobe.com/experience-manager/using/developing-aem-osgi-bundles-jackrabbit.html