Jetty server shows System.err

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Jetty server shows System.err

jack daniel
Hello

I have a Jetty server 7 running in Android 6. It listens to custom incoming HTTP methods.

It works however, in the ADB log it shows a peculiar System.err. There is not much info about it.

02-17 02:33:31.461 12626 12626 W System.err: 2018-02-17 02:33:31.461:INFO:oejs.Server:jetty-7.x.y-SNAPSHOT
02-17 02:33:31.496 12626 12626 W System.err: 2018-02-17 02:33:31.495:INFO:oejs.AbstractConnector:Started SelectChannelConnector@0.0.0.0:8082

What is this error?

This is code implementation, partial. Complete MainActivity here.

public class HelloWorld extends AbstractHandler
{
    @Override
    public void handle( String target,
                        Request baseRequest,
                        HttpServletRequest request,
                        HttpServletResponse response ) throws IOException,
                                                      ServletException
    {
        // Declare response encoding and types
        try {
            response.setContentType("text/html; charset=utf-8");
            // Declare response status code
            response.setStatus(HttpServletResponse.SC_OK);

            // Write back response
            response.getWriter().println("Hello World");
        } catch (UnsupportedEncodingException ec) {
            Log.w("JettyTest", "There is a UnsupportedEncodingException");
            Log.w("JettyTest", ec);
        }

        // Inform jetty that this request has now been handled
        baseRequest.setHandled(true);

        String requestMethod = baseRequest.getMethod().toUpperCase();

        StringBuffer jb = new StringBuffer();
        String line = null;

        Map<String, String> map = new HashMap<String, String>();

        try {

            switch (requestMethod) {

                case "POST":
                    // do post logic
                    Log.w("JettyTest", "Handle POST request");
                    break;

                case "NOTIFY":
                    // do notify logic
                    Log.w("JettyTest", "Handle NOTIFY request");

                    Enumeration headerNames = request.getHeaderNames();
                    while (headerNames.hasMoreElements()) {
                        String key = (String) headerNames.nextElement();
                        String value = request.getHeader(key);                        
                        map.put(key, value);

                    }                 

                    for (String key : map.keySet()) {
                        System.out.println(key + ": " + map.get(key));
                        Log.w("JettyTest", key + ": " + map.get(key));
                    }

                    Log.w("JettyTest", "Remote: "+request.getRemoteHost()+":"+request.getRemotePort());

                    BufferedReader reader = request.getReader();
                    while ((line = reader.readLine()) != null)
                        jb.append(line);

                    Log.w("JettyTest", jb.toString());
                    break;

                case "GET":
                    // do get logic
                    Log.w("JettyTest", "Handle GET request");
                    break;

                default:
                    // do default
                    Log.w("JettyTest", "NOT IMPLEMENTED");

            }

        } catch (Exception e) {
            Log.w("JettyTest", "Server error within handle method.");
            Log.w("JettyTest",e);
        }
    }
} // end HelloWorld

Complete ADB Log

02-17 02:33:31.154 21021 21792 I ActivityManager: Start proc 12626:com.example.arjun.hellotest/u0a239 for activity com.example.arjun.hellotest/.MainActivity
02-17 02:33:31.160 12626 12626 I art     : Late-enabling -Xcheck:jni
02-17 02:33:31.198 12626 12626 D TidaProvider: TidaProvider()
02-17 02:33:31.228 22074 22141 D WtProcessController: set foreground process size 1 pid:12626pacakgeName:com.example.arjun.hellotest
02-17 02:33:31.262 12626 12626 W System  : ClassLoader referenced unknown path: /data/app/com.example.arjun.hellotest-1/lib/arm64
02-17 02:33:31.307 12626 12626 W art     : Before Android 4.1, method android.graphics.PorterDuffColorFilter android.support.graphics.drawable.VectorDrawableCompat.updateTintFilter(android.graphics.PorterDuffColorFilter, android.content.res.ColorStateList, android.graphics.PorterDuff$Mode) would have incorrectly overridden the package-private method in android.graphics.drawable.Drawable
02-17 02:33:31.441 12626 12626 I art     : Rejecting re-init on previously-failed class java.lang.Class<org.eclipse.jetty.util.log.JettyAwareLogger>
02-17 02:33:31.442 12626 12626 I art     : Rejecting re-init on previously-failed class java.lang.Class<org.eclipse.jetty.util.log.JettyAwareLogger>
02-17 02:33:31.461 12626 12626 W System.err: 2018-02-17 02:33:31.461:INFO:oejs.Server:jetty-7.x.y-SNAPSHOT
02-17 02:33:31.496 12626 12626 W System.err: 2018-02-17 02:33:31.495:INFO:oejs.AbstractConnector:Started SelectChannelConnector@0.0.0.0:8082
02-17 02:33:31.526 12626 12673 D OpenGLRenderer: Use EGL_SWAP_BEHAVIOR_PRESERVED: true
02-17 02:33:31.536 12626 12626 D ActivityThreadInjector: clearCachedDrawables.
02-17 02:33:31.625 12626 12673 I Adreno-EGL: <qeglDrvAPI_eglInitialize:379>: EGL 1.4 QUALCOMM build: AU_LINUX_ANDROID_LA.UM.5.3_RB1.06.00.01.211.056_msm8937_64_refs/tags/AU_LINUX_ANDROID_LA.UM.5.3_RB1.06.00.01.211.056__release_AU (I48a9d37399)
02-17 02:33:31.625 12626 12673 I Adreno-EGL: OpenGL ES Shader Compiler Version: XE031.08.00.00
02-17 02:33:31.625 12626 12673 I Adreno-EGL: Build Date: 10/18/16 Tue
02-17 02:33:31.625 12626 12673 I Adreno-EGL: Local Branch: 
02-17 02:33:31.625 12626 12673 I Adreno-EGL: Remote Branch: refs/tags/AU_LINUX_ANDROID_LA.UM.5.3_RB1.06.00.01.211.056
02-17 02:33:31.625 12626 12673 I Adreno-EGL: Local Patches: NONE
02-17 02:33:31.625 12626 12673 I Adreno-EGL: Reconstruct Branch: NOTHING
02-17 02:33:31.633 12626 12673 I OpenGLRenderer: Initialized EGL, version 1.4
02-17 02:33:31.672 12626 12673 E HAL     : Dawei load: module=/system/lib64/hw/gralloc.msm8937.so
02-17 02:33:31.681 12626 12673 E HAL     : Dawei load: module=/system/lib64/hw/gralloc.msm8937.so
02-17 02:33:53.361 12626 12661 W JettyTest: Handle GET request

Build.gradle I have implementation 'org.eclipse.jetty:jetty-webapp:7.6.21.v20160908'





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Re: Jetty server shows System.err

Greg Wilkins
These are not errors, just log.infos to tell you the server has started. It looks like the log is directed to system.err, hence the "err" part.

On 17 February 2018 at 20:24, jack daniel <[hidden email]> wrote:
Hello

I have a Jetty server 7 running in Android 6. It listens to custom incoming HTTP methods.

It works however, in the ADB log it shows a peculiar System.err. There is not much info about it.

02-17 02:33:31.461 12626 12626 W System.err: 2018-02-17 02:33:31.461:INFO:oejs.Server:jetty-7.x.y-SNAPSHOT
02-17 02:33:31.496 12626 12626 W System.err: 2018-02-17 02:33:31.495:INFO:oejs.AbstractConnector:Started SelectChannelConnector@0.0.0.0:8082

What is this error?

This is code implementation, partial. Complete MainActivity here.

public class HelloWorld extends AbstractHandler
{
    @Override
    public void handle( String target,
                        Request baseRequest,
                        HttpServletRequest request,
                        HttpServletResponse response ) throws IOException,
                                                      ServletException
    {
        // Declare response encoding and types
        try {
            response.setContentType("text/html; charset=utf-8");
            // Declare response status code
            response.setStatus(HttpServletResponse.SC_OK);

            // Write back response
            response.getWriter().println("Hello World");
        } catch (UnsupportedEncodingException ec) {
            Log.w("JettyTest", "There is a UnsupportedEncodingException");
            Log.w("JettyTest", ec);
        }

        // Inform jetty that this request has now been handled
        baseRequest.setHandled(true);

        String requestMethod = baseRequest.getMethod().toUpperCase();

        StringBuffer jb = new StringBuffer();
        String line = null;

        Map<String, String> map = new HashMap<String, String>();

        try {

            switch (requestMethod) {

                case "POST":
                    // do post logic
                    Log.w("JettyTest", "Handle POST request");
                    break;

                case "NOTIFY":
                    // do notify logic
                    Log.w("JettyTest", "Handle NOTIFY request");

                    Enumeration headerNames = request.getHeaderNames();
                    while (headerNames.hasMoreElements()) {
                        String key = (String) headerNames.nextElement();
                        String value = request.getHeader(key);                        
                        map.put(key, value);

                    }                 

                    for (String key : map.keySet()) {
                        System.out.println(key + ": " + map.get(key));
                        Log.w("JettyTest", key + ": " + map.get(key));
                    }

                    Log.w("JettyTest", "Remote: "+request.getRemoteHost()+":"+request.getRemotePort());

                    BufferedReader reader = request.getReader();
                    while ((line = reader.readLine()) != null)
                        jb.append(line);

                    Log.w("JettyTest", jb.toString());
                    break;

                case "GET":
                    // do get logic
                    Log.w("JettyTest", "Handle GET request");
                    break;

                default:
                    // do default
                    Log.w("JettyTest", "NOT IMPLEMENTED");

            }

        } catch (Exception e) {
            Log.w("JettyTest", "Server error within handle method.");
            Log.w("JettyTest",e);
        }
    }
} // end HelloWorld

Complete ADB Log

02-17 02:33:31.154 21021 21792 I ActivityManager: Start proc 12626:com.example.arjun.hellotest/u0a239 for activity com.example.arjun.hellotest/.MainActivity
02-17 02:33:31.160 12626 12626 I art     : Late-enabling -Xcheck:jni
02-17 02:33:31.198 12626 12626 D TidaProvider: TidaProvider()
02-17 02:33:31.228 22074 22141 D WtProcessController: set foreground process size 1 pid:12626pacakgeName:com.example.arjun.hellotest
02-17 02:33:31.262 12626 12626 W System  : ClassLoader referenced unknown path: /data/app/com.example.arjun.hellotest-1/lib/arm64
02-17 02:33:31.307 12626 12626 W art     : Before Android 4.1, method android.graphics.PorterDuffColorFilter android.support.graphics.drawable.VectorDrawableCompat.updateTintFilter(android.graphics.PorterDuffColorFilter, android.content.res.ColorStateList, android.graphics.PorterDuff$Mode) would have incorrectly overridden the package-private method in android.graphics.drawable.Drawable
02-17 02:33:31.441 12626 12626 I art     : Rejecting re-init on previously-failed class java.lang.Class<org.eclipse.jetty.util.log.JettyAwareLogger>
02-17 02:33:31.442 12626 12626 I art     : Rejecting re-init on previously-failed class java.lang.Class<org.eclipse.jetty.util.log.JettyAwareLogger>
02-17 02:33:31.461 12626 12626 W System.err: 2018-02-17 02:33:31.461:INFO:oejs.Server:jetty-7.x.y-SNAPSHOT
02-17 02:33:31.496 12626 12626 W System.err: 2018-02-17 02:33:31.495:INFO:oejs.AbstractConnector:Started SelectChannelConnector@0.0.0.0:8082
02-17 02:33:31.526 12626 12673 D OpenGLRenderer: Use EGL_SWAP_BEHAVIOR_PRESERVED: true
02-17 02:33:31.536 12626 12626 D ActivityThreadInjector: clearCachedDrawables.
02-17 02:33:31.625 12626 12673 I Adreno-EGL: <qeglDrvAPI_eglInitialize:379>: EGL 1.4 QUALCOMM build: AU_LINUX_ANDROID_LA.UM.5.3_RB1.06.00.01.211.056_msm8937_64_refs/tags/AU_LINUX_ANDROID_LA.UM.5.3_RB1.06.00.01.211.056__release_AU (I48a9d37399)
02-17 02:33:31.625 12626 12673 I Adreno-EGL: OpenGL ES Shader Compiler Version: XE031.08.00.00
02-17 02:33:31.625 12626 12673 I Adreno-EGL: Build Date: 10/18/16 Tue
02-17 02:33:31.625 12626 12673 I Adreno-EGL: Local Branch: 
02-17 02:33:31.625 12626 12673 I Adreno-EGL: Remote Branch: refs/tags/AU_LINUX_ANDROID_LA.UM.5.3_RB1.06.00.01.211.056
02-17 02:33:31.625 12626 12673 I Adreno-EGL: Local Patches: NONE
02-17 02:33:31.625 12626 12673 I Adreno-EGL: Reconstruct Branch: NOTHING
02-17 02:33:31.633 12626 12673 I OpenGLRenderer: Initialized EGL, version 1.4
02-17 02:33:31.672 12626 12673 E HAL     : Dawei load: module=/system/lib64/hw/gralloc.msm8937.so
02-17 02:33:31.681 12626 12673 E HAL     : Dawei load: module=/system/lib64/hw/gralloc.msm8937.so
02-17 02:33:53.361 12626 12661 W JettyTest: Handle GET request

Build.gradle I have implementation 'org.eclipse.jetty:jetty-webapp:7.6.21.v20160908'





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