34. Thread Pools in Java | ThreadPoolExecutor Framework | Multithreading Part6

[@harshgarg0906]

I would like to thank you as I never thought that I will be ever gonna be successful in learning the Multithreading but you made it possible

[@ConceptandCoding]

Thanks

[@RishabhJain-el7hh]

Hi @Shreyansh sir, First of all thanks for the awesome content Can you please clear me on the issue that if we consider a scenario in which there is new thread creation needs(within max pool size) then firstly the task in queue should be implemented first. and then the task which comes recently due to which we are making new thread(within max thread pool limit) ,should we implement first in first serve principle here to execute the task ??

[@navaneethakrishnak9384]

Best explanation of multithreading concept ever i came across !!

[@theunusual4566]

Just took a subscription. Thanks for the videos.

[@ShubhamSharma-gs3lm]

@Shreyansh: I think it is worth mentioning that we can configure the policy of handling task rejection when both the queue as well as thread pool are full. The task can very well be performed by the main thread in such cases.

[@adityachoudhary1637]

nice video mate, would love to see a seperate video using Visual Vm to profile your local program when its performing both CPU intensive, IO intensive tasks

[@amaldas1048]

Nicely explained..Great job..

[@pratikmistry6888]

Nice explanation..

[@HimanshuBhatt-ri6pu]

Best Explanantion , thanks mate

[@rohangupta4290]

Hey Shreyansh, Great Video!! One Thing Just wanted to point that you have made some miscalculation around 1:09:00 as you used, Max No of Thread=64+(1+50/100), but the actual calculation as per the above formula would be 64*(1+50/100) which comes out to be 96.

[@ConceptandCoding]

Yes i realised that, i did + instead of * -> 64+(1*50/100) that's for pointing out. i remember, i also mentioned in the video, pls double check my calculations once.

[@start1learn-n171]

Tq...well explained 👍

[@rajeshkrishnan1123]

Please unlock all the multithreading videos

[@aishwaryadwani908]

Great Video, Keep it up.

[@ConceptandCoding]

thanks

[@sheldoncooper3373]

At 17:59 shouldn't thread 4 handle task 4 instead of task 9 as task 4 came long before task 9?

[@Asingh42]

Thank you so much!!❤

[@gouravgoel2974]

As always really informative ,best content on youtube, this should not be free, considering the effort, Joined membership to support your efforts :)

[@ConceptandCoding]

Thanks a lot buddy

[@indiccentristrational9755]

What would be the ideal time when they should wait in queue? Is there a way to control it programmatically

[@subbunittala2012]

Just awesome...v v imp

[@alitest-e4t]

🎯🌍 thanks

[@ahnissingh6911]

Sir, for No of cpu cores what should be taken into account Logical cores or Physical cores?

[@gouravgoel2974]

will there be any other videos for multithreading and concurrency series?

[@ConceptandCoding]

Yes, max 2 more

[@gouravgoel2974]

Great

[@learnpromax1]

​@@ConceptandCodingPlease conclude this series quickly buddy, Dec is best time to prepare for interviews and Java is key xD

[@sumanta8504]

I noticed at 27:00 that you mentioned Task 8 would be assigned to Thread 4. My question is, why would Task 8 receive priority? Task 4 is already present in the queue, so shouldn't the new Thread be assigned to Task 4, and Task 8 placed in the queue? Am I understanding this correctly?

[@ConceptandCoding]

I have mentioned in previous video "thread priority one". JVM do not guarantee sequencing of thread execution even if you provide the priority. So which task it will pick that we can not say, but behaviour only we can determine that max thread will be created when queue is full. But do try to implement and check out the output buddy.

[@kushalsheth0212]

hi shrayansh, great video, but I have one doubt, do you think that for entry level positions, this level of questions and implementations they ask?

[@navaneethakrishnak9384]

No i think. but if you are some one with 2+ year of experience and in the job description if they highlighted multithreading then they will ask

[@royalindia7845]

HI Shreyans , could you please provide some real time example to use threadpool

[@phuo9516]

When I did task 9 in Thread 4, but now Thread1, 2, 3 are excited and task 10 is waiting in queue? But my method only completes when task 9 and task 10 are completed? But I have to wait for tasks 5, 6, 7, 8? Why not increase the size of the Queue so that 9 and 10 are placed together in the Queue? so that they are executed sequentially?

[@rahulkapoor2930]

Will it be possible to share pdf link for notes? The Zoho notebook can't be used for offline reading

[@harishgupta1392]

Hi, I am unable to find the notes in the community post. can you please help how to find or directly provide the link

[@ankurrajput2367]

please make one or two video in which focus on implementing the problem all the conceptual things if possible then please

[@ConceptandCoding]

noted

[@chrischorafas4984]

The ThreadPoolExecutor is blocking right? Meaning a thread is not released to take a new task while it waits for its I/O call to respond for example?

[@harshgarg0906]

It will be very useful if you can tell us a brief how to debug the multithreading issue in IDE.

[@ConceptandCoding]

Ack

[@shaktiprasadlenka9227]

Good one. Would be great if you can create a playlist of Java Interview Questions. 🙂

[@ConceptandCoding]

At last of Java playlist I will add

[@chetan1149]

@@ConceptandCoding please create java interview question video

[@EntertainmntCreator]

Sir By when can we expect java playlist to complete? Any tentative date would help

[@ConceptandCoding]

Will complete this month only, only Unit testing topic will left

[@AdarshSingh-cu3yy]

How much more videos will be added for Java Playlist? Because want to complete asap for Switching Job

[@ConceptandCoding]

Max 5 more

[@rajnishsingh2864]

No interview calls coming

[@ravikumarprajapati3950]

Hi sir as i am inserting data into db and data size is 4 crore so could you please tell me how many thtread number should i take

[@learnpromax1]

Hi Shrayansh. Any timeline on how long until remaining Java lectures are uploaded? Many are eagerly waiting to finally conclude Java. Thanks! :)

[@ConceptandCoding]

around 5 more videos, i need to upload, i have kept the target for myself for this month, but yes depends on workload and my bandwidth buddy.

[@learnpromax1]

@@ConceptandCoding great thank you so much for your efforts bro! 🔥

[@amanchoudhary276]

Thank you so much shrayansh sir for your teaching, I have just started learning java from your playlist I want to ask that will you teach servlets,jdbc, spring, spring boot, hibernate as well I mean will you teach complete java developer from beginner to advance ???

[@ConceptandCoding]

Yes after Java, I am going to start Springboot

[@phuo9516]

Why do you say that Thread 0 will "go back" to the Pool after completing Task 1? I thought Thread 1 was still in the Thread Pool?

[@imrohan97]

Thank you Shreyansh for such an amazing content. Can you please explain CompletableFuture and Future concept? I see it is used in day to day work in my company.

[@ConceptandCoding]

yes in next java video i will cover

[@gauravraj2604]

Hey @Shreyansh, suppose I have kept corePoolSize as 3, maximumPoolSize as 5, allowCoreThreadTimeOut as true and keepAliveTime as 15 sec. Initially 3 threads get created since corePoolSize is 3. All 3 got occupied and queue is also full. new task comes and 1 more thread inside pool is created. Now due to calling sleep(15000), program waits for 15 sec. What will happen in this case? All 4 from the pool get killed ? Could you please explain this scenario. Feel free to assume in case I missed to add something.

[@JJ-tp2dd]

@Gaurav If a thread is in the sleep() state, it is not considered idle. Therefore, it will not be terminated due to the keep-alive timeout, even if allowCoreThreadTimeOut is set to true.

[@suryachinnu7756]

Nice explanation…can you please give some in-depth on CompletableFuture with real-time examples

[@ConceptandCoding]

Next video on multithreading, i will cover it.

[@sumitroy7817]

Hey Shreyansh, nice explanation, thanks for the hard work and consistency. can you please share a roadmap for springboot developer?

[@ConceptandCoding]

Yes will add soon

[@DevanshChiluka]

❤

[@ChayneshRathour]

How to join membership.

[@ConceptandCoding]

pls check the home page join button

[@Rudar263]

Could you guys help me to find next video Link this ThreadPool Executer Framework- Types of ThreadPoolExecutor.

[@ConceptandCoding]

all the videos are in sequence, pls check the playlist

[@prateekkanujiya9775]

If we are using unbounded queue , then queue would never be full because it would keep increasing then max number of threads will not work OR it will behave differently . Is it right observation ??

[@ConceptandCoding]

right, thats one of the reason, unbounded queue is not suggested to use. there are other types ThreadExecutor like FixedThreadPoolExecutor, in which Min and Max thread Pool count is same. In that we can use unbounded queue.

[@sambhav07]

Reg max thread count, because a main thread is always running and executor threads are children of that so shouldn't the max thread count should be decremented by 1?

[@MohitSharma-uq2vm]

Your formula for max no. of thread is based on Queuing model

[@akshatshah6413]

why task 9 is given the priority over task 4. If a new thread is created task 4 should ideally execute it. and task 9 should be added to queue

[@navaneethakrishnak9384]

ThreadPool executor is implemented in such a way that it can run with min no of threads on an avg, and whenever min no of threads are busy task will be added to queue, if queue limit exceeded then only it will create new thread. So for task9 it created new thread. Once a new thread joined to threadpool it will be in idle state after completion of task if no extra task present and if thread lifescycles flag isnt set to true.

[@simple_receipes_and_review2246]

Hi ur content is really appreciated… but please don’t repeat same thing again and again🙏🏻🙏🏻My sincere request

[@sauravgupta9302]

explaining same thing multiple times

[@simple_receipes_and_review2246]

Agreee

[@lokeshkumar-wj5rp]

Anyway AI will replace all programming jobs.. 😢

[@CSe_IT_Guy]

Who said that?

[@lokeshkumar-wj5rp]

@@CSe_IT_Guy many people

[@CSe_IT_Guy]

@@lokeshkumar-wj5rp it's just a lie.. don't listen them

[@lokeshkumar-wj5rp]

@@CSe_IT_Guy ohkk

[@WalterWhite-jl8mx]

Yes, it's going to happen

[@Aakashsingh28]

Good but repeated and slow explanation.