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  1. #1
    Member
    Join Date
    Jun 2011
    Location
    Kirkwood
    Posts
    1

    Strange exception

    I've encountered a seemingly random exception that only reproduced once.

    Background: we are using several connectionlisteners simultaneously, managed in separate threads. Caught it on Acer A100 Iconia Tab tablet, Android OS 3.2, latest Lightstreamer android client.

    Here is the stacktrace:

    Code:
    11-29 10:42:30.870 E/AndroidRuntime( 7765): FATAL EXCEPTION: Stream-sense queue
    
    11-29 10:42:30.870 E/AndroidRuntime( 7765): java.lang.IncompatibleClassChangeError: interface not implemented
    
    11-29 10:42:30.870 E/AndroidRuntime( 7765): 	at com.lightstreamer.ls_client.ExtConnectionListener.onNewBytes(ExtConnectionListener.java:129)
    
    11-29 10:42:30.870 E/AndroidRuntime( 7765): 	at com.lightstreamer.ls_client.ExtConnectionListener$5.run(ExtConnectionListener.java:131)
    
    11-29 10:42:30.870 E/AndroidRuntime( 7765): 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1081)
    
    11-29 10:42:30.870 E/AndroidRuntime( 7765): 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:574)
    
    11-29 10:42:30.870 E/AndroidRuntime( 7765): 	at java.lang.Thread.run(Thread.java:1020)

  2. #2
    Administrator
    Join Date
    Jul 2006
    Location
    Milan
    Posts
    975
    The exception is strange also for us.
    The reported line (ExtConnectionListener.java:129) contains a method call on a class that must have been supplied by the JDK since java 5.
    However, other invocations of that method must have been performed before the specified one.
    I can only expect a JVM bug, perhaps a race condition as the class is being replaced by some bytecode optimization process.
    Did you see the exception always with the same stack trace?

 

 

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