java.util.concurrent.RejectedExecutionException

[suyangdong]

To whom it may concern,

I use the SDK version 2.2.13

After a long period of non-stop running (more than 48 hrs and the S3TransferUtility uploads 1 photo per minute on average), the exception came out of nowhere. Apparently I failed to catch this exception which caused the crash of the app (this following exception was shown by setting DefaultUncaughtExceptionHandler )

What is this exception? How to fix it? Or at least where to catch this exception so that the app would not crash?

Thank you!

java.util.concurrent.RejectedExecutionException: Task java.util.concurrent.FutureTask@3a5f74be rejected from java.util.concurrent.ThreadPoolExecutor@392ac91f[Shutting down, pool size = 1, active threads = 1, queued tasks = 0, completed tasks = 106] at java.util.concurrent.ThreadPoolExecutor$AbortPolicy.rejectedExecution(ThreadPoolExecutor.java:2011) at java.util.concurrent.ThreadPoolExecutor.reject(ThreadPoolExecutor.java:793) at java.util.concurrent.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:1339) at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:103) at com.amazonaws.mobileconnectors.s3.transferutility.TransferThreadPool.submitTask(TransferThreadPool.java:46) at com.amazonaws.mobileconnectors.s3.transferutility.TransferRecord.start(TransferRecord.java:160) at com.amazonaws.mobileconnectors.s3.transferutility.TransferService.execCommand(TransferService.java:284) at com.amazonaws.mobileconnectors.s3.transferutility.TransferService$UpdateHandler.handleMessage(TransferService.java:220) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:155) at android.os.HandlerThread.run(HandlerThread.java:61)

[fosterzhang]

RejectedExecutionException can happen when a new task is added to ThreadPoolExecutor on one of these scenarios:

• ThreadPoolExecutor is shutting down.
• ThreadPoolExecutor is full and can't handle more tasks.

The stack trace says ThreadPoolExecutor is shutting down, so it's the first case. This is a rare race condition when a transfer is initiated while TransferService stops itself and terminates ThreadPoolExecutor after being idle for a minute. I label this as bug and will fix it ASAP.

Thanks for torturing the SDK :). Any other findings?

[suyangdong]

Thank you! Not for the moment but I will keep giving the SDK some hard time :-)

[fosterzhang]

This is fixed in v2.2.14. Check it out http://aws.amazon.com/releasenotes/1790148718365679.

[suyangdong]

Thank you so much! Will do!