notify() -> all of the threads in wait set must exit
According to 17.2.4. Interactions of Waits, Notification, and Interruption:
Similarly, notifications cannot be lost due to interrupts. Assume that
a set s of threads is in the wait set of an object m, and another
thread performs a notify on m. Then either:
a) at least one thread in s must return normally from wait, or
b) all of the threads in s must exit wait by throwing
InterruptedException
This surprises me because I know that notify() only wakes up a single thread so b) couldn't happen. The b) option seems to me a completely non-sense because besides implying that notify() is behaving like notifyAll() it's also supposed to interrupt all waiting threads.
Q: is this paragraph wrong? If not then why not?
java multithreading jls
asked Dec 27 '18 at 14:57
adrhc
430314
add a comment |
According to 17.2.4. Interactions of Waits, Notification, and Interruption:
Similarly, notifications cannot be lost due to interrupts. Assume that
a set s of threads is in the wait set of an object m, and another
thread performs a notify on m. Then either:
a) at least one thread in s must return normally from wait, or
b) all of the threads in s must exit wait by throwing
InterruptedException
This surprises me because I know that notify() only wakes up a single thread so b) couldn't happen. The b) option seems to me a completely non-sense because besides implying that notify() is behaving like notifyAll() it's also supposed to interrupt all waiting threads.
Q: is this paragraph wrong? If not then why not?
java multithreading jls
asked Dec 27 '18 at 14:57
adrhc
430314
add a comment |
According to 17.2.4. Interactions of Waits, Notification, and Interruption:
Similarly, notifications cannot be lost due to interrupts. Assume that
a set s of threads is in the wait set of an object m, and another
thread performs a notify on m. Then either:
a) at least one thread in s must return normally from wait, or
b) all of the threads in s must exit wait by throwing
InterruptedException
This surprises me because I know that notify() only wakes up a single thread so b) couldn't happen. The b) option seems to me a completely non-sense because besides implying that notify() is behaving like notifyAll() it's also supposed to interrupt all waiting threads.
Q: is this paragraph wrong? If not then why not?
java multithreading jls
asked Dec 27 '18 at 14:57
adrhc
430314
According to 17.2.4. Interactions of Waits, Notification, and Interruption:
Similarly, notifications cannot be lost due to interrupts. Assume that
a set s of threads is in the wait set of an object m, and another
thread performs a notify on m. Then either:
a) at least one thread in s must return normally from wait, or
b) all of the threads in s must exit wait by throwing
InterruptedException
This surprises me because I know that notify() only wakes up a single thread so b) couldn't happen. The b) option seems to me a completely non-sense because besides implying that notify() is behaving like notifyAll() it's also supposed to interrupt all waiting threads.
Q: is this paragraph wrong? If not then why not?
java multithreading jls
java multithreading jls
asked Dec 27 '18 at 14:57
adrhc
430314
asked Dec 27 '18 at 14:57
adrhc
430314
edited Dec 27 '18 at 16:16
asked Dec 27 '18 at 14:57
adrhc
430314
asked Dec 27 '18 at 14:57
adrhc
430314
asked Dec 27 '18 at 14:57
adrhc
430314
430314
add a comment |
add a comment |
1 Answer
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all of the threads in
smust exit wait by throwing InterruptedException
This means all threads waiting on s were interrupted.
b) means that if all threads are interrupted, no thread will wake from wait() normally, due to being interrupted.
answered Dec 27 '18 at 15:56
Peter Lawrey
441k55558959
Thanks, but from where do you deduce that is about the situation when all threads are interrupted?
– adrhc
Dec 27 '18 at 16:07
@adrhc updated my answer.
– Peter Lawrey
Dec 27 '18 at 16:09
add a comment |
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all of the threads in
smust exit wait by throwing InterruptedException
This means all threads waiting on s were interrupted.
b) means that if all threads are interrupted, no thread will wake from wait() normally, due to being interrupted.
answered Dec 27 '18 at 15:56
Peter Lawrey
441k55558959
Thanks, but from where do you deduce that is about the situation when all threads are interrupted?
– adrhc
Dec 27 '18 at 16:07
@adrhc updated my answer.
– Peter Lawrey
Dec 27 '18 at 16:09
add a comment |
all of the threads in
smust exit wait by throwing InterruptedException
This means all threads waiting on s were interrupted.
b) means that if all threads are interrupted, no thread will wake from wait() normally, due to being interrupted.
answered Dec 27 '18 at 15:56
Peter Lawrey
441k55558959
Thanks, but from where do you deduce that is about the situation when all threads are interrupted?
– adrhc
Dec 27 '18 at 16:07
@adrhc updated my answer.
– Peter Lawrey
Dec 27 '18 at 16:09
add a comment |
all of the threads in
smust exit wait by throwing InterruptedException
This means all threads waiting on s were interrupted.
b) means that if all threads are interrupted, no thread will wake from wait() normally, due to being interrupted.
answered Dec 27 '18 at 15:56
Peter Lawrey
441k55558959
all of the threads in
smust exit wait by throwing InterruptedException
This means all threads waiting on s were interrupted.
b) means that if all threads are interrupted, no thread will wake from wait() normally, due to being interrupted.
answered Dec 27 '18 at 15:56
Peter Lawrey
441k55558959
edited Dec 27 '18 at 16:08
answered Dec 27 '18 at 15:56
Peter Lawrey
441k55558959
answered Dec 27 '18 at 15:56
Peter Lawrey
441k55558959
answered Dec 27 '18 at 15:56
Peter Lawrey
441k55558959
441k55558959
Thanks, but from where do you deduce that is about the situation when all threads are interrupted?
– adrhc
Dec 27 '18 at 16:07
@adrhc updated my answer.
– Peter Lawrey
Dec 27 '18 at 16:09
add a comment |
Thanks, but from where do you deduce that is about the situation when all threads are interrupted?
– adrhc
Dec 27 '18 at 16:07
@adrhc updated my answer.
– Peter Lawrey
Dec 27 '18 at 16:09
Thanks, but from where do you deduce that is about the situation when all threads are interrupted?
– adrhc
Dec 27 '18 at 16:07
Thanks, but from where do you deduce that is about the situation when all threads are interrupted?
– adrhc
Dec 27 '18 at 16:07
@adrhc updated my answer.
– Peter Lawrey
Dec 27 '18 at 16:09
@adrhc updated my answer.
– Peter Lawrey
Dec 27 '18 at 16:09
add a comment |
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