Mutex not working on some versions of android
I have an issue that's been plaguing my app since day 1.
For some users for an unknown reason, Mutex doesn't do its job. Here are the code samples :
object Tools {
val Mutex = kotlinx.coroutines.sync.Mutex()
...
}
Then the user :
Tools.Mutex.withLock {
DoSomeStuffWithZipFile()
}
Now for almost everybody, it works flawlessly with 4 threads running. But for some in the Crashlytics reports, I see that all of the 4 threads are currently inside the lock trying to write on the same zip File.
It's android 6/7/8 that got 32% of the report each, with 9 and lower that have to problems.
Also, the error is ENOENT no such file or directory in a RandomAccessFile() constructor with "rw" option, which is weird in itself...

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I have an issue that's been plaguing my app since day 1.
For some users for an unknown reason, Mutex doesn't do its job. Here are the code samples :
object Tools {
val Mutex = kotlinx.coroutines.sync.Mutex()
...
}
Then the user :
Tools.Mutex.withLock {
DoSomeStuffWithZipFile()
}
Now for almost everybody, it works flawlessly with 4 threads running. But for some in the Crashlytics reports, I see that all of the 4 threads are currently inside the lock trying to write on the same zip File.
It's android 6/7/8 that got 32% of the report each, with 9 and lower that have to problems.
Also, the error is ENOENT no such file or directory in a RandomAccessFile() constructor with "rw" option, which is weird in itself...

add a comment |
I have an issue that's been plaguing my app since day 1.
For some users for an unknown reason, Mutex doesn't do its job. Here are the code samples :
object Tools {
val Mutex = kotlinx.coroutines.sync.Mutex()
...
}
Then the user :
Tools.Mutex.withLock {
DoSomeStuffWithZipFile()
}
Now for almost everybody, it works flawlessly with 4 threads running. But for some in the Crashlytics reports, I see that all of the 4 threads are currently inside the lock trying to write on the same zip File.
It's android 6/7/8 that got 32% of the report each, with 9 and lower that have to problems.
Also, the error is ENOENT no such file or directory in a RandomAccessFile() constructor with "rw" option, which is weird in itself...

I have an issue that's been plaguing my app since day 1.
For some users for an unknown reason, Mutex doesn't do its job. Here are the code samples :
object Tools {
val Mutex = kotlinx.coroutines.sync.Mutex()
...
}
Then the user :
Tools.Mutex.withLock {
DoSomeStuffWithZipFile()
}
Now for almost everybody, it works flawlessly with 4 threads running. But for some in the Crashlytics reports, I see that all of the 4 threads are currently inside the lock trying to write on the same zip File.
It's android 6/7/8 that got 32% of the report each, with 9 and lower that have to problems.
Also, the error is ENOENT no such file or directory in a RandomAccessFile() constructor with "rw" option, which is weird in itself...


edited Nov 20 '18 at 14:46


Jaymin
1,5982825
1,5982825
asked Nov 20 '18 at 12:52
Jean-Philippe GireJean-Philippe Gire
728410
728410
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