Relevant code: Why can’t the server and client be started together in the @Test? I think it gets stuck in the infinite while loop but at the same time, shouldn’t there be context switching with the new threads started after accepting the connection? I expected at least the name of the 2 new thread…
Tag: multithreading
how to add synchronization in following lambda exp?
Can synchronized blocks be used for some of the code blocks written in lambda expression . With respect to the following code snippet : Answer It is possible to use synchronized blocks inside a Java Lambda Expression and inside anonymous classes. Note: You have forgotten to add code snippet as no code snippet…
Java Thread is blocked in join()
I have the following simple code in which I put and take from a Queue represented as an ArrayList. I don’t understand why my thread is blocked in join() method. From main I call as follow: Answer Without running it… The close() method holds lock at the time it calls thread.join() and waits on thre…
Thread join(1) usage in mutlithread wait-notify example in Java
I have example with wait-notify application which is invoked from main: } and invoker } As I expected “exception” message should be printed as I join(1) to threads and wait them to die only 1 mills, but they are sleeping more than that. What am I missing? Answer join(1) has 3 ways ‘out’…
Visibility of mutable object under different locks in Java
mFeaute is a mutable object. I want to know if the change of mFeature in setFeature(Feature feature) is visible to mFeature in useFeature(…) with a different explicit form of synchronized. Thanks. Answer The above code is suffering from a data race and hence is broken. You do not have a happens before e…
Why does Thread.activeCount() count more threads than my code creates?
I’m a beginner in Java development and i trying to write a multi threading process with using CountDownLatch in below code. But ExecutorService not working as it should. ExecutorService thread number not working as it defined in code. Console log; I defined thread number as 50, but when it works Thread.…
What does “Aren’t allocating the things put into queues” mean?
I’m reading this: https://concurrency.markmail.org/search/?q=ArrayBlockingQueue+LinkedBlockingQueue#query:ArrayBlockingQueue%20LinkedBlockingQueue%20from%3A%22Doug%20Lea%22+page:1+mid:sgx3amdfga7esqul+state:results In which Doug Lea says: Usually, when you are putting something into a queue, you will ha…
Correct way to decrement an AtomicLong by a certain delta
Given an AtomicLong object, what is the right way to decrement the value by a delta? Option 1 Option 2 While both give the desired result, I want to understand under what circumstance will they not represent the desired behavior i.e to decrement a long value atomically? (One drawback of the second approach fo…
service.shutdownNow() not killing the thread
In my application im spawning a single thread executor and in the thread I’m doing logic of loading ML models/predictions. If any of the logic exceeds the time-limit(4 minutes), I’m shutting down the thread. But when the application is up, when time out happens, I’m able to see logs of threa…
How does a thread work with Handler in Android?
In the code section given below, I have run a thread on a button click. At first, the thread will set text to the textView, then it will sleep for 6 seconds. But, in reality on the button click, at first, the thread is sleeping for 6 seconds and then it is setting text to the textView. Now, why is