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<H1>[mono-android] Thread Exceptions Without Stacktrace</H1>
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<B>chris@Terrago</B>
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<A HREF="mailto:monodroid%40lists.ximian.com?Subject=%5Bmono-android%5D%20Thread%20Exceptions%20Without%20Stacktrace&In-Reply-To=CAG9nUbsX4vwkSb4Zi%2B2TMa5P-YCeicFyt9eKUohNeJ3mknwqEw%40mail.gmail.com"
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TITLE="[mono-android] Thread Exceptions Without Stacktrace">cdrake at terragotech.com
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<I>Tue Dec 13 16:18:34 EST 2011</I>
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<PRE>I have to pile on to this thread because I am experiencing the EXACT same
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problem on 1.2, 1.9.x, and now 4.0. I have an AsyncTask running in the
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background performing a long-running task (polygon tessellation among other
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things). The application crashes randomly after a period of time. If I
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attempt to step into the application using the debugger I cannot isolate a
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single point of failure, it varies. It does seem to be strongly correlated
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to how much is being done on the background thread, shorter operations are
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successful. The single constant symptom is that the crash always occurs
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immediately after the monodroid garbage collector runs and is followed by an
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empty stacktrace in the log. Below I have included the relevant segment of
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the log, look at the entries for process ID 6349. Just like Aaron, I have
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found that simpler test apps do not reproduce the problem, for me it seems
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to be related to how much data my background thread is processing and how
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many iterations are performed. I just noticed that 4.0.1 has been released
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(*fingers crossed* :) )
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12-08 17:22:13.644 D/dalvikvm( 6349): GC_EXPLICIT freed 4995 objects /
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300176 bytes in 30ms
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12-08 17:22:13.644 I/monodroid-gc( 6349): GC cleanup summary: 21 objects
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tested - resurrecting 15.
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12-08 17:22:14.519 E/wpa_supplicant( 1439): in wpa_drv_driver_cmd
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12-08 17:22:14.519 D/wpa_supplicant( 1439): wpa_driver_tista_driver_cmd
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RSSI-APPROX
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12-08 17:22:14.519 D/wpa_supplicant( 1439): rssi-approx command
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12-08 17:22:14.519 E/wpa_supplicant( 1439): in wpa_drv_driver_cmd
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12-08 17:22:14.519 D/wpa_supplicant( 1439): wpa_driver_tista_driver_cmd
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LINKSPEED
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12-08 17:22:14.519 D/wpa_supplicant( 1439): Link Speed command
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12-08 17:22:14.519 D/wpa_supplicant( 1439): buf LinkSpeed 54
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12-08 17:22:17.387 D/dalvikvm( 5993): GC_EXPLICIT freed 239 objects / 14312
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bytes in 36ms
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12-08 17:22:17.519 E/wpa_supplicant( 1439): in wpa_drv_driver_cmd
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12-08 17:22:17.519 D/wpa_supplicant( 1439): wpa_driver_tista_driver_cmd
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RSSI-APPROX
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12-08 17:22:17.519 D/wpa_supplicant( 1439): rssi-approx command
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12-08 17:22:17.519 E/wpa_supplicant( 1439): in wpa_drv_driver_cmd
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12-08 17:22:17.519 D/wpa_supplicant( 1439): wpa_driver_tista_driver_cmd
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LINKSPEED
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12-08 17:22:17.519 D/wpa_supplicant( 1439): Link Speed command
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12-08 17:22:17.519 D/wpa_supplicant( 1439): buf LinkSpeed 54
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12-08 17:22:17.777 W/PowerManagerService( 1375): Timer 0x7->0x3|0x1
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12-08 17:22:17.777 I/PowerManagerService( 1375): Ulight 7->3|0
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12-08 17:22:20.519 E/wpa_supplicant( 1439): in wpa_drv_driver_cmd
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12-08 17:22:20.519 D/wpa_supplicant( 1439): wpa_driver_tista_driver_cmd
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RSSI-APPROX
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12-08 17:22:20.519 D/wpa_supplicant( 1439): rssi-approx command
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12-08 17:22:20.519 E/wpa_supplicant( 1439): in wpa_drv_driver_cmd
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12-08 17:22:20.519 D/wpa_supplicant( 1439): wpa_driver_tista_driver_cmd
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LINKSPEED
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12-08 17:22:20.519 D/wpa_supplicant( 1439): Link Speed command
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12-08 17:22:20.519 D/wpa_supplicant( 1439): buf LinkSpeed 54
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12-08 17:22:23.519 E/wpa_supplicant( 1439): in wpa_drv_driver_cmd
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12-08 17:22:23.519 D/wpa_supplicant( 1439): wpa_driver_tista_driver_cmd
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RSSI-APPROX
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12-08 17:22:23.519 D/wpa_supplicant( 1439): rssi-approx command
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12-08 17:22:23.519 E/wpa_supplicant( 1439): in wpa_drv_driver_cmd
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12-08 17:22:23.519 D/wpa_supplicant( 1439): wpa_driver_tista_driver_cmd
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LINKSPEED
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12-08 17:22:23.519 D/wpa_supplicant( 1439): Link Speed command
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12-08 17:22:23.519 D/wpa_supplicant( 1439): buf LinkSpeed 54
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12-08 17:22:26.519 E/wpa_supplicant( 1439): in wpa_drv_driver_cmd
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12-08 17:22:26.519 D/wpa_supplicant( 1439): wpa_driver_tista_driver_cmd
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RSSI-APPROX
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12-08 17:22:26.519 D/wpa_supplicant( 1439): rssi-approx command
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12-08 17:22:26.527 E/wpa_supplicant( 1439): in wpa_drv_driver_cmd
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12-08 17:22:26.527 D/wpa_supplicant( 1439): wpa_driver_tista_driver_cmd
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LINKSPEED
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12-08 17:22:26.527 D/wpa_supplicant( 1439): Link Speed command
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12-08 17:22:26.527 D/wpa_supplicant( 1439): buf LinkSpeed 54
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12-08 17:22:27.644 D/BatteryService( 1375): update start
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12-08 17:22:27.652 D/BatteryService( 1375): updateBattery level:72 scale:100
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status:4 health:2 present:true voltage: 3866 temperature: 343 technology:
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Li-ion AC powered:false USB powered:true icon:17302563
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12-08 17:22:27.668 D/Tethering( 1375): active iface (usb0) reported as
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added, ignoring
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12-08 17:22:27.668 D/WifiService( 1375): ACTION_BATTERY_CHANGED pluggedType:
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2
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12-08 17:22:27.668 D/BatteryService( 1375): update start
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12-08 17:22:27.676 D/BatteryService( 1375): update start
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12-08 17:22:29.199 I/mono ( 6349): Stacktrace:
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12-08 17:22:29.199 I/mono ( 6349):
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12-08 17:22:29.215 I/WindowManager( 1375): WIN DEATH: Window{48f7d828
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SurfaceView paused=false}
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12-08 17:22:29.223 I/ActivityManager( 1375): Process
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TerragoMobileAndroid.TerragoMobileAndroid (pid 6349) has died.
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12-08 17:22:29.230 I/WindowManager( 1375): WIN DEATH: Window{49007770
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TerragoMobileAndroid.TerragoMobileAndroid/terragomobileandroid.TGOMobileApplication
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paused=false}
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12-08 17:22:29.238 I/Launcher( 1467): onResume(). mIsNewIntent : false
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12-08 17:22:29.238 I/UsageStats( 1375): Unexpected resume of
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com.sec.android.app.twlauncher while already resumed in
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TerragoMobileAndroid.TerragoMobileAndroid
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--
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View this message in context: <A HREF="http://mono-for-android.1047100.n5.nabble.com/Thread-Exceptions-Without-Stacktrace-tp5069711p5072804.html">http://mono-for-android.1047100.n5.nabble.com/Thread-Exceptions-Without-Stacktrace-tp5069711p5072804.html</A>
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Sent from the Mono for Android mailing list archive at Nabble.com.
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</PRE>
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