Android の PAHO ライブラリから MQTT クライアントを実装しています。ときどき、メッセージを公開しようとしたときにアプリケーションがフリーズし (私が思うに)、何が起こっているのか理解できません。
また、長文になることをあらかじめお詫び申し上げます。重要なビットが何であるかは本当にわかりません.SO「スポイラー」タグ>! は詳細を隠すために機能しません.
MQTT クライアントは別のスレッドで動作していますが、UI スレッドから mqtt クライアント インスタンスを呼び出しています。おそらくこれはロックアップを引き起こしますか？代わりに、クライアントをスレッドのインスタンスとして定義し、アクションをクライアントに転送するスレッド内のメソッドを呼び出す必要がありますか?
アプリがハングアップすると、しばらくすると ANR が作動し、アプリを閉じるように求められます。これを行うと、/data/anr/traces.txt からプロセスの次のスタック トレースを取得します。
DALVIK THREADS:
(mutexes: tll=0 tsl=0 tscl=0 ghl=0)
"main" prio=5 tid=1 WAIT
| group="main" sCount=1 dsCount=0 obj=0x40a59460 self=0x109d828
| sysTid=22050 nice=0 sched=0/0 cgrp=default handle=1074492552
| schedstat=( 8524633000 459501000 2204 ) utm=827 stm=25 core=1
at java.lang.Object.wait(Native Method)
- waiting on <0x410f4bd0> (a java.lang.Object)
at java.lang.Object.wait(Object.java:364)
at org.eclipse.paho.client.mqttv3.internal.MqttDeliveryTokenImpl.waitUntilSent(MqttDeliveryTokenImpl.java:120)
at org.eclipse.paho.client.mqttv3.internal.ClientComms.internalSend(ClientComms.java:85)
at org.eclipse.paho.client.mqttv3.internal.ClientComms.sendNoWait(ClientComms.java:118)
at org.eclipse.paho.client.mqttv3.MqttTopic.publish(MqttTopic.java:62)
at se.chalmers.pd.dashboard.MqttWorker.publish(MqttWorker.java:177)
at se.chalmers.pd.dashboard.ApplicationController.sendResponse(ApplicationController.java:238)
at se.chalmers.pd.dashboard.ApplicationController.onLoadComplete(ApplicationController.java:358)
at se.chalmers.pd.dashboard.MainActivity$CustomWebViewClient.onPageFinished(MainActivity.java:89)
at android.webkit.CallbackProxy.handleMessage(CallbackProxy.java:275)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4424)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
at dalvik.system.NativeStart.main(Native Method)
"Thread-3645" prio=5 tid=12 NATIVE
| group="main" sCount=1 dsCount=0 obj=0x4111a5f8 self=0x13cc698
| sysTid=22083 nice=0 sched=0/0 cgrp=default handle=19370528
| schedstat=( 35731000 17350000 70 ) utm=1 stm=2 core=0
at dalvik.system.NativeStart.run(Native Method)
"MQTT Client Callback" prio=5 tid=17 WAIT
| group="main" sCount=1 dsCount=0 obj=0x41118bf0 self=0x13bb500
| sysTid=22082 nice=0 sched=0/0 cgrp=default handle=20691280
| schedstat=( 392860000 110613000 493 ) utm=35 stm=4 core=1
at java.lang.Object.wait(Native Method)
- waiting on <0x410d1c48> (a java.lang.Object)
at java.lang.Object.wait(Object.java:364)
at org.eclipse.paho.client.mqttv3.internal.MqttDeliveryTokenImpl.waitUntilSent(MqttDeliveryTokenImpl.java:120)
at org.eclipse.paho.client.mqttv3.internal.ClientComms.internalSend(ClientComms.java:85)
at org.eclipse.paho.client.mqttv3.internal.ClientComms.sendNoWait(ClientComms.java:118)
at org.eclipse.paho.client.mqttv3.MqttTopic.publish(MqttTopic.java:62)
at se.chalmers.pd.dashboard.MqttWorker.publish(MqttWorker.java:177)
at se.chalmers.pd.dashboard.ApplicationController.sendResponse(ApplicationController.java:238)
at se.chalmers.pd.dashboard.ApplicationController.handleSystemMessage(ApplicationController.java:210)
at se.chalmers.pd.dashboard.ApplicationController.onMessage(ApplicationController.java:154)
at se.chalmers.pd.dashboard.MqttWorker$1$CustomMqttCallback.notifyCallbacks(MqttWorker.java:133)
at se.chalmers.pd.dashboard.MqttWorker$1$CustomMqttCallback.messageArrived(MqttWorker.java:128)
at org.eclipse.paho.client.mqttv3.internal.CommsCallback.handleMessage(CommsCallback.java:248)
at org.eclipse.paho.client.mqttv3.internal.CommsCallback.run(CommsCallback.java:139)
at java.lang.Thread.run(Thread.java:856)
"MQTT Client Comms Sender" prio=5 tid=16 TIMED_WAIT
| group="main" sCount=1 dsCount=0 obj=0x41118ae0 self=0x13bada0
| sysTid=22081 nice=0 sched=0/0 cgrp=default handle=20689392
| schedstat=( 6038000 11147000 189 ) utm=0 stm=0 core=0
at java.lang.Object.wait(Native Method)
- waiting on <0x410ffd90> (a java.lang.Object)
at java.lang.Object.wait(Object.java:401)
at org.eclipse.paho.client.mqttv3.internal.ClientState.get(ClientState.java:555)
at org.eclipse.paho.client.mqttv3.internal.CommsSender.run(CommsSender.java:83)
at java.lang.Thread.run(Thread.java:856)
"MQTT Client Comms Receiver" prio=5 tid=15 NATIVE
| group="main" sCount=1 dsCount=0 obj=0x41116048 self=0x13ba870
| sysTid=22080 nice=0 sched=0/0 cgrp=default handle=20619056
| schedstat=( 656144000 184252000 2369 ) utm=59 stm=6 core=1
at libcore.io.Posix.recvfromBytes(Native Method)
at libcore.io.Posix.recvfrom(Posix.java:131)
at libcore.io.BlockGuardOs.recvfrom(BlockGuardOs.java:164)
at libcore.io.IoBridge.recvfrom(IoBridge.java:503)
at java.net.PlainSocketImpl.read(PlainSocketImpl.java:488)
at java.net.PlainSocketImpl.access$000(PlainSocketImpl.java:46)
at java.net.PlainSocketImpl$PlainSocketInputStream.read(PlainSocketImpl.java:240)
at libcore.io.Streams.readSingleByte(Streams.java:41)
at java.net.PlainSocketImpl$PlainSocketInputStream.read(PlainSocketImpl.java:236)
at java.io.DataInputStream.readByte(DataInputStream.java:96)
at org.eclipse.paho.client.mqttv3.internal.wire.MqttInputStream.readMqttWireMessage(MqttInputStream.java:51)
at org.eclipse.paho.client.mqttv3.internal.CommsReceiver.run(CommsReceiver.java:86)
at java.lang.Thread.run(Thread.java:856)
"CookieSyncManager" prio=5 tid=14 NATIVE
| group="main" sCount=1 dsCount=0 obj=0x410d0ad0 self=0x1286e20
| sysTid=22066 nice=10 sched=0/0 cgrp=bg_non_interactive handle=19445224
| schedstat=( 562000 10095000 5 ) utm=0 stm=0 core=0
at android.os.MessageQueue.nativePollOnce(Native Method)
at android.os.MessageQueue.next(MessageQueue.java:118)
at android.os.Looper.loop(Looper.java:118)
at android.webkit.WebSyncManager.run(WebSyncManager.java:90)
at android.webkit.CookieSyncManager.run(CookieSyncManager.java:61)
at java.lang.Thread.run(Thread.java:856)
"AsyncTask #1" prio=5 tid=13 WAIT
| group="main" sCount=1 dsCount=0 obj=0x410d0920 self=0x121f5b0
| sysTid=22065 nice=10 sched=0/0 cgrp=bg_non_interactive handle=19335920
| schedstat=( 5753000 108824000 12 ) utm=0 stm=0 core=0
at java.lang.Object.wait(Native Method)
- waiting on <0x410d0ab8> (a java.lang.VMThread) held by tid=13 (AsyncTask #1)
at java.lang.Thread.parkFor(Thread.java:1231)
at sun.misc.Unsafe.park(Unsafe.java:323)
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:157)
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2022)
at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:413)
at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1009)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1069)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
at java.lang.Thread.run(Thread.java:856)
"WebViewCoreThread" prio=5 tid=11 NATIVE
| group="main" sCount=1 dsCount=0 obj=0x410caa38 self=0x1266550
| sysTid=22063 nice=0 sched=0/0 cgrp=default handle=18808064
| schedstat=( 273871000 128721000 264 ) utm=20 stm=7 core=0
at android.os.MessageQueue.nativePollOnce(Native Method)
at android.os.MessageQueue.next(MessageQueue.java:118)
at android.os.Looper.loop(Looper.java:118)
at android.webkit.WebViewCore$WebCoreThread.run(WebViewCore.java:728)
at java.lang.Thread.run(Thread.java:856)
"Binder Thread #2" prio=5 tid=10 NATIVE
| group="main" sCount=1 dsCount=0 obj=0x410c1ef0 self=0x129de58
| sysTid=22062 nice=0 sched=0/0 cgrp=default handle=19025912
| schedstat=( 1983000 23992000 8 ) utm=0 stm=0 core=1
at dalvik.system.NativeStart.run(Native Method)
"Binder Thread #1" prio=5 tid=9 NATIVE
| group="main" sCount=1 dsCount=0 obj=0x410ba370 self=0x127cc90
| sysTid=22061 nice=0 sched=0/0 cgrp=default handle=18949528
| schedstat=( 2932000 32665000 18 ) utm=0 stm=0 core=0
at dalvik.system.NativeStart.run(Native Method)
"FinalizerWatchdogDaemon" daemon prio=5 tid=8 TIMED_WAIT
| group="main" sCount=1 dsCount=0 obj=0x410b6320 self=0x1227790
| sysTid=22059 nice=0 sched=0/0 cgrp=default handle=19405328
| schedstat=( 3721000 6943000 27 ) utm=0 stm=0 core=0
at java.lang.VMThread.sleep(Native Method)
at java.lang.Thread.sleep(Thread.java:1031)
at java.lang.Thread.sleep(Thread.java:1013)
at java.lang.Daemons$FinalizerWatchdogDaemon.run(Daemons.java:213)
at java.lang.Thread.run(Thread.java:856)
"FinalizerDaemon" daemon prio=5 tid=7 WAIT
| group="main" sCount=1 dsCount=0 obj=0x410b61c8 self=0x12207b8
| sysTid=22058 nice=0 sched=0/0 cgrp=default handle=19405208
| schedstat=( 1055000 601000 7 ) utm=0 stm=0 core=1
at java.lang.Object.wait(Native Method)
- waiting on <0x40a4f5d0> (a java.lang.ref.ReferenceQueue)
at java.lang.Object.wait(Object.java:401)
at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:102)
at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:73)
at java.lang.Daemons$FinalizerDaemon.run(Daemons.java:168)
at java.lang.Thread.run(Thread.java:856)
"ReferenceQueueDaemon" daemon prio=5 tid=6 WAIT
| group="main" sCount=1 dsCount=0 obj=0x410b6060 self=0x129d168
| sysTid=22057 nice=0 sched=0/0 cgrp=default handle=19404976
| schedstat=( 573000 395000 11 ) utm=0 stm=0 core=1
at java.lang.Object.wait(Native Method)
- waiting on <0x40a4f4f8>
at java.lang.Object.wait(Object.java:364)
at java.lang.Daemons$ReferenceQueueDaemon.run(Daemons.java:128)
at java.lang.Thread.run(Thread.java:856)
"Compiler" daemon prio=5 tid=5 VMWAIT
| group="system" sCount=1 dsCount=0 obj=0x410b5f70 self=0x127c4d0
| sysTid=22056 nice=0 sched=0/0 cgrp=default handle=19172728
| schedstat=( 151015000 59330000 862 ) utm=9 stm=6 core=0
at dalvik.system.NativeStart.run(Native Method)
"JDWP" daemon prio=5 tid=4 VMWAIT
| group="system" sCount=1 dsCount=0 obj=0x410b5e88 self=0x12b39c8
| sysTid=22055 nice=0 sched=0/0 cgrp=default handle=19323736
| schedstat=( 4263000 2800000 18 ) utm=0 stm=0 core=1
at dalvik.system.NativeStart.run(Native Method)
"Signal Catcher" daemon prio=5 tid=3 RUNNABLE
| group="system" sCount=0 dsCount=0 obj=0x410b5d90 self=0x1268fd8
| sysTid=22054 nice=0 sched=0/0 cgrp=default handle=19014912
| schedstat=( 3760000 203000 4 ) utm=0 stm=0 core=1
at dalvik.system.NativeStart.run(Native Method)
"GC" daemon prio=5 tid=2 VMWAIT
| group="system" sCount=1 dsCount=0 obj=0x410b5cb0 self=0x12257d8
| sysTid=22053 nice=0 sched=0/0 cgrp=default handle=19042944
| schedstat=( 271726000 42594000 230 ) utm=26 stm=1 core=1
at dalvik.system.NativeStart.run(Native Method)
----- end 22050 -----
厳密モードをオンにすると、ディスク書き込みについて警告するトレースがいくつか得られますが、どれも特に長くはありません。これらは厳密なモード トレースです:
> > 04-30 10:29:50.053: D/StrictMode(22229): StrictMode policy violation;
> > ~duration=35 ms: android.os.StrictMode$StrictModeDiskReadViolation:
> > policy=31 violation=2 04-30 10:29:50.053: D/StrictMode(22229): at
> > android.os.StrictMode$AndroidBlockGuardPolicy.onReadFromDisk(StrictMode.java:1089)
> > 04-30 10:29:50.053: D/StrictMode(22229): at
> > libcore.io.BlockGuardOs.open(BlockGuardOs.java:106) 04-30
> > 10:29:50.053: D/StrictMode(22229): at
> > libcore.io.IoBridge.open(IoBridge.java:390) 04-30 10:29:50.053:
> > D/StrictMode(22229): at
> > java.io.FileOutputStream.(FileOutputStream.java:88) 04-30
> > 10:29:50.053: D/StrictMode(22229): at
> > java.io.FileOutputStream.(FileOutputStream.java:73) 04-30
> > 10:29:50.053: D/StrictMode(22229): at
> > org.eclipse.paho.client.mqttv3.MqttDefaultFilePersistence.put(MqttDefaultFilePersistence.java:162)
> > 04-30 10:29:50.053: D/StrictMode(22229): at
> > org.eclipse.paho.client.mqttv3.internal.ClientState.send(ClientState.java:397)
> > 04-30 10:29:50.053: D/StrictMode(22229): at
> > org.eclipse.paho.client.mqttv3.internal.ClientComms.internalSend(ClientComms.java:81)
> > 04-30 10:29:50.053: D/StrictMode(22229): at
> > org.eclipse.paho.client.mqttv3.internal.ClientComms.sendNoWait(ClientComms.java:118)
> > 04-30 10:29:50.053: D/StrictMode(22229): at
> > org.eclipse.paho.client.mqttv3.MqttTopic.publish(MqttTopic.java:62)
> > 04-30 10:29:50.053: D/StrictMode(22229): at
> > se.chalmers.pd.dashboard.MqttWorker.publish(MqttWorker.java:177) 04-30
> > 10:29:50.053: D/StrictMode(22229): at
> > se.chalmers.pd.dashboard.ApplicationController.sendResponse(ApplicationController.java:238)
> > 04-30 10:29:50.053: D/StrictMode(22229): at
> > se.chalmers.pd.dashboard.ApplicationController.onLoadComplete(ApplicationController.java:358)
> > 04-30 10:29:50.053: D/StrictMode(22229): at
> > se.chalmers.pd.dashboard.MainActivity$CustomWebViewClient.onPageFinished(MainActivity.java:95)
> > 04-30 10:29:50.053: D/StrictMode(22229): at
> > android.webkit.CallbackProxy.handleMessage(CallbackProxy.java:275)
> > 04-30 10:29:50.053: D/StrictMode(22229): at
> > android.os.Handler.dispatchMessage(Handler.java:99) 04-30
> > 10:29:50.053: D/StrictMode(22229): at
> > android.os.Looper.loop(Looper.java:137) 04-30 10:29:50.053:
> > D/StrictMode(22229): at
> > android.app.ActivityThread.main(ActivityThread.java:4424) 04-30
> > 10:29:50.053: D/StrictMode(22229): at
> > java.lang.reflect.Method.invokeNative(Native Method) 04-30
> > 10:29:50.053: D/StrictMode(22229): at
> > java.lang.reflect.Method.invoke(Method.java:511) 04-30 10:29:50.053:
> > D/StrictMode(22229): at
> > com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
> > 04-30 10:29:50.053: D/StrictMode(22229): at
> > com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 04-30
> > 10:29:50.053: D/StrictMode(22229): at
> > dalvik.system.NativeStart.main(Native Method) 04-30 10:29:50.053:
>
>
> > D/StrictMode(22229): StrictMode policy violation; ~duration=26 ms:
> > android.os.StrictMode$StrictModeDiskWriteViolation: policy=31
> > violation=1 04-30 10:29:50.053: D/StrictMode(22229): at
> > android.os.StrictMode$AndroidBlockGuardPolicy.onWriteToDisk(StrictMode.java:1063)
> > 04-30 10:29:50.053: D/StrictMode(22229): at
> > libcore.io.BlockGuardOs.write(BlockGuardOs.java:190) 04-30
> > 10:29:50.053: D/StrictMode(22229): at
> > libcore.io.IoBridge.write(IoBridge.java:447) 04-30 10:29:50.053:
> > D/StrictMode(22229): at
> > java.io.FileOutputStream.write(FileOutputStream.java:187) 04-30
> > 10:29:50.053: D/StrictMode(22229): at
> > org.eclipse.paho.client.mqttv3.MqttDefaultFilePersistence.put(MqttDefaultFilePersistence.java:163)
> > 04-30 10:29:50.053: D/StrictMode(22229): at
> > org.eclipse.paho.client.mqttv3.internal.ClientState.send(ClientState.java:397)
> > 04-30 10:29:50.053: D/StrictMode(22229): at
> > org.eclipse.paho.client.mqttv3.internal.ClientComms.internalSend(ClientComms.java:81)
> > 04-30 10:29:50.053: D/StrictMode(22229): at
> > org.eclipse.paho.client.mqttv3.internal.ClientComms.sendNoWait(ClientComms.java:118)
> > 04-30 10:29:50.053: D/StrictMode(22229): at
> > org.eclipse.paho.client.mqttv3.MqttTopic.publish(MqttTopic.java:62)
> > 04-30 10:29:50.053: D/StrictMode(22229): at
> > se.chalmers.pd.dashboard.MqttWorker.publish(MqttWorker.java:177) 04-30
> > 10:29:50.053: D/StrictMode(22229): at
> > se.chalmers.pd.dashboard.ApplicationController.sendResponse(ApplicationController.java:238)
> > 04-30 10:29:50.053: D/StrictMode(22229): at
> > se.chalmers.pd.dashboard.ApplicationController.onLoadComplete(ApplicationController.java:358)
> > 04-30 10:29:50.053: D/StrictMode(22229): at
> > se.chalmers.pd.dashboard.MainActivity$CustomWebViewClient.onPageFinished(MainActivity.java:95)
> > 04-30 10:29:50.053: D/StrictMode(22229): at
> > android.webkit.CallbackProxy.handleMessage(CallbackProxy.java:275)
> > 04-30 10:29:50.053: D/StrictMode(22229): at
> > android.os.Handler.dispatchMessage(Handler.java:99) 04-30
> > 10:29:50.053: D/StrictMode(22229): at
> > android.os.Looper.loop(Looper.java:137) 04-30 10:29:50.053:
> > D/StrictMode(22229): at
> > android.app.ActivityThread.main(ActivityThread.java:4424) 04-30
> > 10:29:50.053: D/StrictMode(22229): at
> > java.lang.reflect.Method.invokeNative(Native Method) 04-30
> > 10:29:50.053: D/StrictMode(22229): at
> > java.lang.reflect.Method.invoke(Method.java:511) 04-30 10:29:50.053:
> > D/StrictMode(22229): at
> > com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
> > 04-30 10:29:50.053: D/StrictMode(22229): at
> > com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 04-30
> > 10:29:50.053: D/StrictMode(22229): at
> > dalvik.system.NativeStart.main(Native Method) 04-30 10:29:50.053:
>
>
> > D/StrictMode(22229): StrictMode policy violation; ~duration=18 ms:
> > android.os.StrictMode$StrictModeDiskWriteViolation: policy=31
> > violation=1 04-30 10:29:50.053: D/StrictMode(22229): at
> > android.os.StrictMode$AndroidBlockGuardPolicy.onWriteToDisk(StrictMode.java:1063)
> > 04-30 10:29:50.053: D/StrictMode(22229): at
> > libcore.io.BlockGuardOs.write(BlockGuardOs.java:190) 04-30
> > 10:29:50.053: D/StrictMode(22229): at
> > libcore.io.IoBridge.write(IoBridge.java:447) 04-30 10:29:50.053:
> > D/StrictMode(22229): at
> > java.io.FileOutputStream.write(FileOutputStream.java:187) 04-30
> > 10:29:50.053: D/StrictMode(22229): at
> > org.eclipse.paho.client.mqttv3.MqttDefaultFilePersistence.put(MqttDefaultFilePersistence.java:165)
> > 04-30 10:29:50.053: D/StrictMode(22229): at
> > org.eclipse.paho.client.mqttv3.internal.ClientState.send(ClientState.java:397)
> > 04-30 10:29:50.053: D/StrictMode(22229): at
> > org.eclipse.paho.client.mqttv3.internal.ClientComms.internalSend(ClientComms.java:81)
> > 04-30 10:29:50.053: D/StrictMode(22229): at
> > org.eclipse.paho.client.mqttv3.internal.ClientComms.sendNoWait(ClientComms.java:118)
> > 04-30 10:29:50.053: D/StrictMode(22229): at
> > org.eclipse.paho.client.mqttv3.MqttTopic.publish(MqttTopic.java:62)
> > 04-30 10:29:50.053: D/StrictMode(22229): at
> > se.chalmers.pd.dashboard.MqttWorker.publish(MqttWorker.java:177) 04-30
> > 10:29:50.053: D/StrictMode(22229): at
> > se.chalmers.pd.dashboard.ApplicationController.sendResponse(ApplicationController.java:238)
> > 04-30 10:29:50.053: D/StrictMode(22229): at
> > se.chalmers.pd.dashboard.ApplicationController.onLoadComplete(ApplicationController.java:358)
> > 04-30 10:29:50.053: D/StrictMode(22229): at
> > se.chalmers.pd.dashboard.MainActivity$CustomWebViewClient.onPageFinished(MainActivity.java:95)
> > 04-30 10:29:50.053: D/StrictMode(22229): at
> > android.webkit.CallbackProxy.handleMessage(CallbackProxy.java:275)
> > 04-30 10:29:50.053: D/StrictMode(22229): at
> > android.os.Handler.dispatchMessage(Handler.java:99) 04-30
> > 10:29:50.053: D/StrictMode(22229): at
> > android.os.Looper.loop(Looper.java:137) 04-30 10:29:50.053:
> > D/StrictMode(22229): at
> > android.app.ActivityThread.main(ActivityThread.java:4424) 04-30
> > 10:29:50.053: D/StrictMode(22229): at
> > java.lang.reflect.Method.invokeNative(Native Method) 04-30
> > 10:29:50.053: D/StrictMode(22229): at
> > java.lang.reflect.Method.invoke(Method.java:511) 04-30 10:29:50.053:
> > D/StrictMode(22229): at
> > com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
> > 04-30 10:29:50.053: D/StrictMode(22229): at
> > com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 04-30
> > 10:29:50.053: D/StrictMode(22229): at
> > dalvik.system.NativeStart.main(Native Method) 04-30 10:29:50.053:
>
>
> > D/StrictMode(22229): StrictMode policy violation; ~duration=2 ms:
> > android.os.StrictMode$StrictModeDiskWriteViolation: policy=31
> > violation=1 04-30 10:29:50.053: D/StrictMode(22229): at
> > android.os.StrictMode$AndroidBlockGuardPolicy.onWriteToDisk(StrictMode.java:1063)
> > 04-30 10:29:50.053: D/StrictMode(22229): at
> > libcore.io.BlockGuardOs.fsync(BlockGuardOs.java:96) 04-30
> > 10:29:50.053: D/StrictMode(22229): at
> > java.io.FileDescriptor.sync(FileDescriptor.java:71) 04-30
> > 10:29:50.053: D/StrictMode(22229): at
> > org.eclipse.paho.client.mqttv3.MqttDefaultFilePersistence.put(MqttDefaultFilePersistence.java:167)
> > 04-30 10:29:50.053: D/StrictMode(22229): at
> > org.eclipse.paho.client.mqttv3.internal.ClientState.send(ClientState.java:397)
> > 04-30 10:29:50.053: D/StrictMode(22229): at
> > org.eclipse.paho.client.mqttv3.internal.ClientComms.internalSend(ClientComms.java:81)
> > 04-30 10:29:50.053: D/StrictMode(22229): at
> > org.eclipse.paho.client.mqttv3.internal.ClientComms.sendNoWait(ClientComms.java:118)
> > 04-30 10:29:50.053: D/StrictMode(22229): at
> > org.eclipse.paho.client.mqttv3.MqttTopic.publish(MqttTopic.java:62)
> > 04-30 10:29:50.053: D/StrictMode(22229): at
> > se.chalmers.pd.dashboard.MqttWorker.publish(MqttWorker.java:177) 04-30
> > 10:29:50.053: D/StrictMode(22229): at
> > se.chalmers.pd.dashboard.ApplicationController.sendResponse(ApplicationController.java:238)
> > 04-30 10:29:50.053: D/StrictMode(22229): at
> > se.chalmers.pd.dashboard.ApplicationController.onLoadComplete(ApplicationController.java:358)
> > 04-30 10:29:50.053: D/StrictMode(22229): at
> > se.chalmers.pd.dashboard.MainActivity$CustomWebViewClient.onPageFinished(MainActivity.java:95)
> > 04-30 10:29:50.053: D/StrictMode(22229): at
> > android.webkit.CallbackProxy.handleMessage(CallbackProxy.java:275)
> > 04-30 10:29:50.053: D/StrictMode(22229): at
> > android.os.Handler.dispatchMessage(Handler.java:99) 04-30
> > 10:29:50.053: D/StrictMode(22229): at
> > android.os.Looper.loop(Looper.java:137) 04-30 10:29:50.053:
> > D/StrictMode(22229): at
> > android.app.ActivityThread.main(ActivityThread.java:4424) 04-30
> > 10:29:50.053: D/StrictMode(22229): at
> > java.lang.reflect.Method.invokeNative(Native Method) 04-30
> > 10:29:50.053: D/StrictMode(22229): at
> > java.lang.reflect.Method.invoke(Method.java:511) 04-30 10:29:50.053:
> > D/StrictMode(22229): at
> > com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
> > 04-30 10:29:50.053: D/StrictMode(22229): at
> > com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 04-30
> > 10:29:50.053: D/StrictMode(22229): at
> > dalvik.system.NativeStart.main(Native Method)
編集：これがStrictModeを有効にする方法です
StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder()
.detectAll()
.penaltyLog()
.build());
編集 2: 今後の参考のために、問題の原因を追加するために、検索エンジンが見つけられるように、ここに何かを入力する必要があると考えました。
問題は、私たちが持っていた Node.JS ベースのブローカー mqttjs にあることが判明しました。これは私たちの実装に過ぎない可能性があります。mqttjs 開発者の例はテストしていません。特定の数のメッセージが公開された後、ブローカーはトークンの公開と返却を停止しました。MQTT クライアントは別のスレッドで実行されていましたが、UI スレッドから呼び出されたため、いくつかの問題が発生しました。
とにかく、Mosquitto に変更し、今ではすべてがうまく機能しています。