Error pinging server

[danikula]

In some cases local server cache proxy is not pinged. One known problem is system proxy in connection's settings (wi-fi or apn).
May be some another reasons exist.
Typical stacktrace is

E/Pinger: Error reading ping response
          com.danikula.videocache.ProxyCacheException: Error opening connection for http://127.0.0.1:52645/ping with offset 0
              at com.danikula.videocache.HttpUrlSource.open(HttpUrlSource.java:75)
              at com.danikula.videocache.Pinger.pingServer(Pinger.java:86)
              at com.danikula.videocache.Pinger.access$100(Pinger.java:28)
              at com.danikula.videocache.Pinger$PingCallable.call(Pinger.java:108)
              at com.danikula.videocache.Pinger$PingCallable.call(Pinger.java:104)
              at java.util.concurrent.FutureTask.run(FutureTask.java:237)
              at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
              at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
              at java.lang.Thread.run(Thread.java:818)
           Caused by: java.io.FileNotFoundException: http://127.0.0.1:52645/ping
              at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:238)
              at com.danikula.videocache.HttpUrlSource.open(HttpUrlSource.java:70)
              at com.danikula.videocache.Pinger.pingServer(Pinger.java:86) 
              at com.danikula.videocache.Pinger.access$100(Pinger.java:28) 
              at com.danikula.videocache.Pinger$PingCallable.call(Pinger.java:108) 
              at com.danikula.videocache.Pinger$PingCallable.call(Pinger.java:104) 
              at java.util.concurrent.FutureTask.run(FutureTask.java:237) 
              at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113) 
              at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588) 
              at java.lang.Thread.run(Thread.java:818) 
E/Pinger: Error reading ping response
          com.danikula.videocache.ProxyCacheException: Error opening connection for http://127.0.0.1:52645/ping with offset 0
              at com.danikula.videocache.HttpUrlSource.open(HttpUrlSource.java:75)
              at com.danikula.videocache.Pinger.pingServer(Pinger.java:86)
              at com.danikula.videocache.Pinger.access$100(Pinger.java:28)
              at com.danikula.videocache.Pinger$PingCallable.call(Pinger.java:108)
              at com.danikula.videocache.Pinger$PingCallable.call(Pinger.java:104)
              at java.util.concurrent.FutureTask.run(FutureTask.java:237)
              at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
              at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
              at java.lang.Thread.run(Thread.java:818)
           Caused by: java.io.FileNotFoundException: http://127.0.0.1:52645/ping
              at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:238)
              at com.danikula.videocache.HttpUrlSource.open(HttpUrlSource.java:70)
              at com.danikula.videocache.Pinger.pingServer(Pinger.java:86) 
              at com.danikula.videocache.Pinger.access$100(Pinger.java:28) 
              at com.danikula.videocache.Pinger$PingCallable.call(Pinger.java:108) 
              at com.danikula.videocache.Pinger$PingCallable.call(Pinger.java:104) 
              at java.util.concurrent.FutureTask.run(FutureTask.java:237) 
              at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113) 
              at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588) 
              at java.lang.Thread.run(Thread.java:818) 
E/Pinger: Error reading ping response
          com.danikula.videocache.ProxyCacheException: Error opening connection for http://127.0.0.1:52645/ping with offset 0
              at com.danikula.videocache.HttpUrlSource.open(HttpUrlSource.java:75)
              at com.danikula.videocache.Pinger.pingServer(Pinger.java:86)
              at com.danikula.videocache.Pinger.access$100(Pinger.java:28)
              at com.danikula.videocache.Pinger$PingCallable.call(Pinger.java:108)
              at com.danikula.videocache.Pinger$PingCallable.call(Pinger.java:104)
              at java.util.concurrent.FutureTask.run(FutureTask.java:237)
              at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
              at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
              at java.lang.Thread.run(Thread.java:818)
           Caused by: java.io.FileNotFoundException: http://127.0.0.1:52645/ping
              at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:238)
              at com.danikula.videocache.HttpUrlSource.open(HttpUrlSource.java:70)
              at com.danikula.videocache.Pinger.pingServer(Pinger.java:86) 
              at com.danikula.videocache.Pinger.access$100(Pinger.java:28) 
              at com.danikula.videocache.Pinger$PingCallable.call(Pinger.java:108) 
              at com.danikula.videocache.Pinger$PingCallable.call(Pinger.java:104) 
              at java.util.concurrent.FutureTask.run(FutureTask.java:237) 
              at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113) 
              at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588) 
              at java.lang.Thread.run(Thread.java:818) 
E/Pinger: Error pinging server (attempts: 3, max timeout: 280). If you see this message, please, email me danikula@gmail.com or create issue here https://github.com/danikula/AndroidVideoCache/issues
          com.danikula.videocache.ProxyCacheException: Error pinging server (attempts: 3, max timeout: 280). If you see this message, please, email me danikula@gmail.com or create issue here https://github.com/danikula/AndroidVideoCache/issues
              at com.danikula.videocache.Pinger.ping(Pinger.java:67)
              at com.danikula.videocache.HttpProxyCacheServer.isAlive(HttpProxyCacheServer.java:182)
              at com.danikula.videocache.HttpProxyCacheServer.getProxyUrl(HttpProxyCacheServer.java:119)
              at com.danikula.videocache.HttpProxyCacheServer.getProxyUrl(HttpProxyCacheServer.java:100)
              at com.danikula.videocache.sample.VideoFragment.startVideo(VideoFragment.java:59)
              at com.danikula.videocache.sample.VideoFragment.afterViewInjected(VideoFragment.java:44)
              at com.danikula.videocache.sample.VideoFragment_.onViewChanged(VideoFragment_.java:107)
              at org.androidannotations.api.view.OnViewChangedNotifier.notifyViewChanged(OnViewChangedNotifier.java:41)
              at com.danikula.videocache.sample.VideoFragment_.onViewCreated(VideoFragment_.java:72)
              at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1097)
              at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1259)
              at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:738)
              at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1624)
              at android.support.v4.app.FragmentController.execPendingActions(FragmentController.java:330)
              at android.support.v4.app.FragmentActivity.onStart(FragmentActivity.java:547)
              at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1237)
              at android.app.Activity.performStart(Activity.java:6268)
              at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2379)
              at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
              at android.app.ActivityThread.-wrap11(ActivityThread.java)
              at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
              at android.os.Handler.dispatchMessage(Handler.java:102)
              at android.os.Looper.loop(Looper.java:148)
              at android.app.ActivityThread.main(ActivityThread.java:5417)
              at java.lang.reflect.Method.invoke(Native Method)
              at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
              at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)

[danikula]

Since #28 fixed by this commit it should be fixed too.

[ricardorover]

Hi. Using AndroidVideoCache version 2.7.0 I saw the log below, so here I am, reporting as asked :) Hope it helps somehow.

I was testing using AndroidVideoCache inside recyclerview rows to pre-load audio and video. Scrolling between a lot of items very fast, around list position 650 the log stack traces appeared:

08-01 23:37:33.905 16591-16591 W/Pinger: Error pinging server (attempt: 0, timeout: 70). 
08-01 23:37:34.046 16591-16591 W/Pinger: Error pinging server (attempt: 1, timeout: 140). 
08-01 23:37:34.326 16591-16591 W/Pinger: Error pinging server (attempt: 2, timeout: 280). 
08-01 23:37:34.335 16591-16591 E/Pinger: Error pinging server (attempts: 3, max timeout: 280). If you see this message, please, report at https://github.com/danikula/AndroidVideoCache/issues/134. Default proxies are: [DIRECT]
                                                          com.danikula.videocache.ProxyCacheException: Error pinging server (attempts: 3, max timeout: 280). If you see this message, please, report at https://github.com/danikula/AndroidVideoCache/issues/134. Default proxies are: [DIRECT]. Version: 2.7.0
                                                              at com.danikula.videocache.Pinger.ping(Pinger.java:73)
                                                              at com.danikula.videocache.HttpProxyCacheServer.isAlive(HttpProxyCacheServer.java:183)
                                                              at com.danikula.videocache.HttpProxyCacheServer.getProxyUrl(HttpProxyCacheServer.java:120)
                                                              at com.danikula.videocache.HttpProxyCacheServer.getProxyUrl(HttpProxyCacheServer.java:101)
                                                              at com.myapp.app.controller.AssetController.streamAsset(AssetController.java:117)
                                                              at com.myapp.app.ui.main.feed.cell.AppVideoCell.bind(AppVideoCell.java:38)
                                                              at com.myapp.app.ui.main.feed.AppListAdapter.onBindViewHolder(AppListAdapter.java:97)
                                                              at android.support.v7.widget.RecyclerView$Adapter.onBindViewHolder(RecyclerView.java:6356)
                                                              at android.support.v7.widget.RecyclerView$Adapter.bindViewHolder(RecyclerView.java:6389)
                                                              at android.support.v7.widget.RecyclerView$Recycler.tryBindViewHolderByDeadline(RecyclerView.java:5335)
                                                              at android.support.v7.widget.RecyclerView$Recycler.tryGetViewHolderForPositionByDeadline(RecyclerView.java:5598)
                                                              at android.support.v7.widget.GapWorker.prefetchPositionWithDeadline(GapWorker.java:282)
                                                              at android.support.v7.widget.GapWorker.flushTaskWithDeadline(GapWorker.java:336)
                                                              at android.support.v7.widget.GapWorker.flushTasksWithDeadline(GapWorker.java:349)
                                                              at android.support.v7.widget.GapWorker.prefetch(GapWorker.java:356)
                                                              at android.support.v7.widget.GapWorker.run(GapWorker.java:387)
                                                              at android.os.Handler.handleCallback(Handler.java:751)
                                                              at android.os.Handler.dispatchMessage(Handler.java:95)
                                                              at android.os.Looper.loop(Looper.java:154)
                                                              at android.app.ActivityThread.main(ActivityThread.java:6126)
                                                              at java.lang.reflect.Method.invoke(Native Method)
                                                              at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
                                                              at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)

(...)

08-01 23:37:34.543 16591-16591 W/Pinger: Error pinging server (attempt: 0, timeout: 70). 
08-01 23:37:34.685 16591-16591 W/Pinger: Error pinging server (attempt: 1, timeout: 140). 
08-01 23:37:34.966 16591-16591 W/Pinger: Error pinging server (attempt: 2, timeout: 280). 
08-01 23:37:34.969 16591-16591 E/Pinger: Error pinging server (attempts: 3, max timeout: 280). If you see this message, please, report at https://github.com/danikula/AndroidVideoCache/issues/134. Default proxies are: [DIRECT]
                                                          com.danikula.videocache.ProxyCacheException: Error pinging server (attempts: 3, max timeout: 280). If you see this message, please, report at https://github.com/danikula/AndroidVideoCache/issues/134. Default proxies are: [DIRECT]. Version: 2.7.0
                                                              at com.danikula.videocache.Pinger.ping(Pinger.java:73)
                                                              at com.danikula.videocache.HttpProxyCacheServer.isAlive(HttpProxyCacheServer.java:183)
                                                              at com.danikula.videocache.HttpProxyCacheServer.getProxyUrl(HttpProxyCacheServer.java:120)
                                                              at com.danikula.videocache.HttpProxyCacheServer.getProxyUrl(HttpProxyCacheServer.java:101)
                                                              at com.myapp.app.controller.AssetController.streamAsset(AssetController.java:117)
                                                              at com.myapp.app.ui.main.feed.cell.AppVideoCell.bind(AppVideoCell.java:38)
                                                              at com.myapp.app.ui.main.feed.AppListAdapter.onBindViewHolder(AppListAdapter.java:97)
                                                              at android.support.v7.widget.RecyclerView$Adapter.onBindViewHolder(RecyclerView.java:6356)
                                                              at android.support.v7.widget.RecyclerView$Adapter.bindViewHolder(RecyclerView.java:6389)
                                                              at android.support.v7.widget.RecyclerView$Recycler.tryBindViewHolderByDeadline(RecyclerView.java:5335)
                                                              at android.support.v7.widget.RecyclerView$Recycler.tryGetViewHolderForPositionByDeadline(RecyclerView.java:5598)
                                                              at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:5440)
                                                              at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:5436)
                                                              at android.support.v7.widget.LinearLayoutManager$LayoutState.next(LinearLayoutManager.java:2224)
                                                              at android.support.v7.widget.LinearLayoutManager.layoutChunk(LinearLayoutManager.java:1551)
                                                              at android.support.v7.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1511)
                                                              at android.support.v7.widget.LinearLayoutManager.scrollBy(LinearLayoutManager.java:1325)
                                                              at android.support.v7.widget.LinearLayoutManager.scrollVerticallyBy(LinearLayoutManager.java:1061)
                                                              at android.support.v7.widget.RecyclerView$ViewFlinger.run(RecyclerView.java:4726)
                                                              at android.view.Choreographer$CallbackRecord.run(Choreographer.java:874)
                                                              at android.view.Choreographer.doCallbacks(Choreographer.java:686)
                                                              at android.view.Choreographer.doFrame(Choreographer.java:618)
                                                              at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:860)
                                                              at android.os.Handler.handleCallback(Handler.java:751)
                                                              at android.os.Handler.dispatchMessage(Handler.java:95)
                                                              at android.os.Looper.loop(Looper.java:154)
                                                              at android.app.ActivityThread.main(ActivityThread.java:6126)
                                                              at java.lang.reflect.Method.invoke(Native Method)
                                                              at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
                                                              at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)

(...)

08-01 23:37:37.535 16591-20734 E/ProxyCache: ProxyCache error
                                                              com.danikula.videocache.ProxyCacheException: Error opening connection for http://api.myapp.com/asset/123 with offset 72932. Version: 2.7.0
                                                                  at com.danikula.videocache.HttpUrlSource.open(HttpUrlSource.java:75)
                                                                  at com.danikula.videocache.ProxyCache.readSource(ProxyCache.java:123)
                                                                  at com.danikula.videocache.ProxyCache.access$100(ProxyCache.java:19)
                                                                  at com.danikula.videocache.ProxyCache$SourceReaderRunnable.run(ProxyCache.java:187)
                                                                  at java.lang.Thread.run(Thread.java:761)
                                                               Caused by: java.io.FileNotFoundException: http://api.myapp.com/asset/123
                                                                  at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:250)
                                                                  at com.danikula.videocache.HttpUrlSource.open(HttpUrlSource.java:70)
                                                                  at com.danikula.videocache.ProxyCache.readSource(ProxyCache.java:123) 
                                                                  at com.danikula.videocache.ProxyCache.access$100(ProxyCache.java:19) 
                                                                  at com.danikula.videocache.ProxyCache$SourceReaderRunnable.run(ProxyCache.java:187) 
                                                                  at java.lang.Thread.run(Thread.java:761) 
08-01 23:37:37.537 16591-17446 E/HttpProxyCacheServer: HttpProxyCacheServer error
                                                                        com.danikula.videocache.ProxyCacheException: Error processing request. Version: 2.7.0
                                                                            at com.danikula.videocache.HttpProxyCacheServer.processSocket(HttpProxyCacheServer.java:241)
                                                                            at com.danikula.videocache.HttpProxyCacheServer.access$200(HttpProxyCacheServer.java:52)
                                                                            at com.danikula.videocache.HttpProxyCacheServer$SocketProcessorRunnable.run(HttpProxyCacheServer.java:338)
                                                                            at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:428)
                                                                            at java.util.concurrent.FutureTask.run(FutureTask.java:237)
                                                                            at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1133)
                                                                            at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:607)
                                                                            at java.lang.Thread.run(Thread.java:761)
                                                                         Caused by: com.danikula.videocache.ProxyCacheException: Error reading source 1 times. Version: 2.7.0
                                                                            at com.danikula.videocache.ProxyCache.checkReadSourceErrorsCount(ProxyCache.java:59)
                                                                            at com.danikula.videocache.ProxyCache.read(ProxyCache.java:45)
                                                                            at com.danikula.videocache.HttpProxyCache.responseWithCache(HttpProxyCache.java:79)
                                                                            at com.danikula.videocache.HttpProxyCache.processRequest(HttpProxyCache.java:45)
                                                                            at com.danikula.videocache.HttpProxyCacheServerClients.processRequest(HttpProxyCacheServerClients.java:42)
                                                                            at com.danikula.videocache.HttpProxyCacheServer.processSocket(HttpProxyCacheServer.java:234)
                                                                            at com.danikula.videocache.HttpProxyCacheServer.access$200(HttpProxyCacheServer.java:52) 
                                                                            at com.danikula.videocache.HttpProxyCacheServer$SocketProcessorRunnable.run(HttpProxyCacheServer.java:338) 
                                                                            at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:428) 
                                                                            at java.util.concurrent.FutureTask.run(FutureTask.java:237) 
                                                                            at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1133) 
                                                                            at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:607) 
                                                                            at java.lang.Thread.run(Thread.java:761)