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How can a synchronized block cause Thread starvation in Java?

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Pragya Keshap answered on February 4, 2023 Popularity 4/10 Helpfulness 2/10

answer How can a synchronized block cause Thread starvation in Java?

How can a synchronized block cause Thread starvation in Java?

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It is not defined for synchronization that which thread will enter a

synchronized block. It may happen that if many threads are waiting

for the entry to a synchronized block, some threads may have to wait

longer than other threads.

Hence these threads with lower priority will not get enough time to

finish their work in time.

class Starvation extends Thread { 
 static int count = 1; 
 public void run() { 
  System.out.println(count + " Thread execution starts"); 
  System.out.println("Thread execution completes"); 
  count++; 
 } 
 public static void main(String[] args) throws InterruptedException { 
  System.out.println("Parent thread execution starts"); 

  /* Priority of each thread given. */
        /* Thread 1 with priority 7. */
  Starvation thread1 = new Starvation(); 
  thread1.setPriority(7); 
        /* Thread 2 with priority 6. */
  Starvation thread2 = new Starvation(); 
  thread2.setPriority(6); 
        /* Thread 3 with priority 5. */
  Starvation thread3 = new Starvation(); 
  thread3.setPriority(5);
        /* Thread 4 with priority 4. */
  Starvation thread4 = new Starvation(); 
  thread4.setPriority(4); 
        /* Thread 5 with priority 3. */
  Starvation thread5 = new Starvation(); 
  thread5.setPriority(3); 

  thread1.run(); 
  thread2.run(); 
  thread3.run(); 
  thread4.run(); 

  /* Here thread 5 have to wait because of the 
     other threads */
  thread5.run(); 

  System.out.println("Parent thread execution completes"); 
 } 
}

https://medium.com/javarevisited/starvation-of-threads-in-java-e3d6bcfeb770

Popularity 4/10 Helpfulness 2/10 Language java

Source: Grepper

Tags: java synchronized-block

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Contributed on Feb 04 2023

Pragya Keshap

0 Answers Avg Quality 2/10

How can a synchronized block cause Thread starvation in Java?

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