Core Java with OCJP/SCJP: Multi Threading Part-12 || DeadLock || Starvation

[@pandit-jee-bihar]

He is the only person who can go and ask a thread "why are you waiting ?". Shows the close bonding between the two. :)

[@businessgamerprb5398]

Legends say that they were in a relationship long ago... They have broken up but both are still in love.. Hence the bonding

[@unknownhacker8152]

This is called true love, everyone waiting for forever for each other😂😂... Btw very great video,sir, thaank u so much for the great videos🥰

[@DurgaSoftwareSolutions]

Hello Friend. Thanks for your valuable feedback. It will boost us to do new things. Please subscribe to get updates about new videos. You can view all other Core Java with SCJP/OCJP Videos by Durga sir in the following link: goo.gl/kqvaf2

[@sunayanagonuru5231]

Thanks to the camera man who took the videos very clearly..

[@neshakkumar]

For the first time, I am seeing some who is appreciating the cameraman for his work. Impressed ...really impressed

[@shubhendrasingh9921]

Yes

[@sanjanamekan3351]

He is the best java teacher. He is my dhronacharya.

[@DurgaSoftwareSolutions]

Hello Sanjan. Thanks for your valuable feedback. It will boost us to do new things. Please subscribe to get updates about new videos. You can view all other Core Java with SCJP/OCJP Videos by Durga sir in the following link: goo.gl/kqvaf2

[@mahesh_kok]

Sir in Deadlock class create instances of A and B inside main method then there would be no need to create new method m1. students might get confused because till now in each and every video of Thread you were fabulous in giving real time examples and creating the simplest code to make students understand ....Hats off to u sir

[@sathyareddy3272]

before correcting sir, you should have read the code properly.If u create both the instances inside the static main method then you would not be able to run two different threads and there will be no deadlock situation in the program ever.

[@HarshalGad]

Thank you very much Sir for making these valuable videos free. Just to make things look perfect from your side and help other viewers. I would like to point out that this video is missing the starvation part. Thanks Again! for being so generous. God Bless You Sir! ❤

[@DurgaSoftwareSolutions]

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[@javashashavali]

Durga sir ante Durga sare👌👌👌👌👌

[@DurgaSoftwareSolutions]

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[@NEHASINGH-lq2lw]

Shouldn't we make m1() method a static method as we're calling it from main method which is static. Why didn't it give error?

[@DurgaSoftwareSolutions]

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[@EngineerVaibhav]

92th video completed🎉❤

[@dinushachathuranga7657]

Bunch of thanks for very clear explanation❤

[@DurgaSoftwareSolutions]

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[@sasikalac3119]

Hatts off sir your teaching...........

[@DurgaSoftwareSolutions]

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[@Ervaibhav75]

Sir deserves a Nobel prize...

[@DurgaSoftwareSolutions]

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[@usamaalioffical]

One of the best videos on Deadlock Bohat kamal ka smjaya Sir ap ne. One suggestion I would like to give you sir for future Kindly try to make length of videos short and also your english accent is little bit difficult to understand.I hope you will not mind these suggestions and will be more better in future. Again Thanks for giving great videos

[@DurgaSoftwareSolutions]

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[@mdrahilshahzad8242]

Thanks to Durgasoft team.

[@vinaygiri861]

awesome work sir

[@DurgaSoftwareSolutions]

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[@ranveervaghela7030]

Completed watching on 08-08-2024 at 3.30 PM :)

[@rockbrand753]

Thank you sir.. thank you so much sir for clearing all concepts in depth

[@DurgaSoftwareSolutions]

Hello Friend. Thanks for your valuable feedback. It will boost us to do new things. Please subscribe to get updates about new videos. You can view all other Core Java with SCJP/OCJP Videos by Durga sir in the following link: goo.gl/kqvaf2

[@rohituppal8426]

Thanks a lot Sir. Sir I am waiting for your videos on concurrency topics like Barrier synchronization, countdown latch , cyclic barrier.

[@mdrahilshahzad8242]

Rohit Uppal have you got video for the same?

[@sumitbadugu417]

Please Make video on DSA

[@JohnWick-zc5li]

Great job sir...thanks a lots

[@DurgaSoftwareSolutions]

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[@PandeyRavindra1]

very nice explanation ..

[@madhusudhankamalapuram7608]

For each class for ever 🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏

[@03_afshanahmedkhan39]

Looks like deadlock == corona :) For both prevention is the only best possibility !!

[@DurgaSoftwareSolutions]

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[@priyalagdhir9693]

Sir while explaining join() method you said if one thread calls join method on second thread and second thread calls join method on first thread that condition can also cause deadlock This deadlock occurs even though we are not using synchronised. Can you please explain

[@DurgaSoftwareSolutions]

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[@chettiannanannan1486]

@Priya Lagdhir..Did u get any answers?

[@rizwanshahid1447]

Thanks so much, Durga Sir.

[@madhusudhankamalapuram7608]

Thanks sir...................

[@nagasrinivasrayana1178]

In the concept of starvation, if the dead lock situation occurs among the high priority threads itself, then what will happen to the low priority thread ?

[@DurgaSoftwareSolutions]

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[@MyMayankgoyal]

when deadlock appears among high priority thread they will be in waiting state and low priority thread will eventually get processer time once all high priority thread goes to waiting state

[@राजनगोंगल]

👍👍👍👍👍👍

[@DurgaSoftwareSolutions]

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[@batchubharath6951]

Deadlock will also come when we call join method on two threads each other

[@gauravjaiswar5667]

or if you call join() on Executing Thread Object..!!

[@malharjajoo7393]

In the example in the video , what happens if you just try and use wait( ) method before accessing b's lock ? ( and same before "a's" lock )

[@prabhudeepsingh4236]

To get all the programs of Multi Threading give a star to the following repository: github.com/PrabhudeepSingh/Java-07-MultiThreading Follow github.com/PrabhudeepSingh for more such code.

[@ShubhamDhingra27]

Why did we not discuss ways to avoid deadlock?

[@DurgaSoftwareSolutions]

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[@tusharshukla7215]

Hello Sir Just want to confirm can we set below example of Deadlock situation: public class Deadlock { public static void main(String[] args) { String ary[] = { "abc", "cde" }; Deadlock.main(ary); System.out.println(ary); } } Thanks Tushar Shukla

[@DurgaSoftwareSolutions]

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[@kumaranil181]

Its recursion with no exit condition which will ultimately cause java.lang.StackOverflowError and hence not deadlock

[@manasadiki7576]

Thank you sir👌👌

[@eadunuripranay5977]

sir in deadlock example without sleep() method also i'm able to achieve deadlock? so can we think that sleep() method is optional?

[@DurgaSoftwareSolutions]

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[@eadunuripranay5977]

yes but wt i understood is if we place sleep() method then we can have a clear understanding of execution of each thread.

[@chandralekha7717]

Thanks sir , concepts are very clear now

[@DurgaSoftwareSolutions]

Hello Chandra Lekha. Thanks for your valuable feedback. It will boost us to do new things. Please subscribe to get updates about new videos. You can view all other Core Java with SCJP/OCJP Videos by Durga sir in the following link: goo.gl/kqvaf2

[@AnjaneyuluGoud9]

Hi sir, why do we need to kill a program if we get deadlock situation, can't we make changes in the program?

[@eknoor292]

Hello Durga Sir, Can you clear the following doubt? Is the following scenario possible? 1. Main thread calls m1() on Deadlock class. 2. m1() calls this. start(); 3. New thread created by this.start() is not scheduled by JVM and only main() thread keeps executing 4. main thread calls a.d1(b); 5. d1 calls b.last() and is successful since this.start() thread is not yet allocated by JVM and doesnot have b's lock 6. b.last() completes 7. Since b.last() completed a.d1() also completes and a's lock is released. 8. Now this.start() is allocated by thread scheduler and given b's lock. It also calls a.last() and since a's lock is now free. It also completed successfully. In above case there will be no deadlock. Is this possible?

[@DurgaSoftwareSolutions]

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[@anelchori9469]

calling join method on main and child thread it goes to deadlock situation I think as you said, but we can go to deadlock without synchronized keyword right!!

[@icecream-pq5uy]

yes!!

[@dhanushkaweragoda3534]

If two threads call join() method on the each other thread, that also cause for deadlock isn't it ?

[@vishalaggarwal1573]

join() internally calls sleep() which results in releasing of lock that's why not considered as deadlock.

[@vishalaggarwal1573]

sry join calls wait method not sleep().

[@prashantchougule9603]

The above code if you are debug then it will run successful. without deadlock.

[@abantichattopadhyay3183]

if I put this.start(); after a.methodA(b); then it is not in deadlock. Unable to understand the cause. Please help. Thanks in advance.

[@Pushpendrasingh-gc4jh]

when you put { a.methodA(b); //line 1 this.start(); //line 2 } than main thread came to line 1 and after this it will go to execute a.methodA(b); after completing it and release all locks(a,b) ,main thread came and go to line 2 and start thread this thread will do it's task and all lock is available so he complete it's task....So no Deadlock I hope you will understand!!!!!

[@sumitjain3526]

heads of u sir.

[@DurgaSoftwareSolutions]

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[@NexusGFXCo]

DeadLock Situation is like Give me your password of Gaming ID Immediately I'll pay you !! And from other side, Give me money Immediately I'll give you password of my gaming id😂

[@ArunraajSingh]

sir why did we have to implement a.d1(b) and b.d2(a) in separate methods? Why not together?

[@sathyareddy3272]

the reason is a.d1(b) is executed by the child thread i.e., Deadlock thread while b.d2(a) is executed by main thread. if we don't call them from their respective blocks then they will be executed by only one thread there would be no deadlock situation ever......

[@paramchand7327]

If a thread call join() on himself will it not be a deadlock situation ... like I am calling Thread.currentThread().join(); Now my current thread is waiting for forever.

[@falseys]

It will be, also if two threads call join() on each other.

[@vivekbudge9706]

thank so much sir :)

[@shashavalijava9]

Durga is Durga sir

[@DurgaSoftwareSolutions]

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[@ajitupadhyay5550]

Sir, Could you please share some more points to avoid deadlock without removing synchronized keyword ?

[@DurgaSoftwareSolutions]

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[@avinashjha7393]

Where to find Durga sir's Java notes

[@DurgaSoftwareSolutions]

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[@Rahulkumar-rp8hf]

who else watching this in 2021.

[@growtogether8014]

i am watching the video at speed 2.0

[@Sushobhit333]

i don't understand :/