Dualboot problem with windows 10 and ubuntu in MSI

I have installed windows 10 and ubuntu 20.04 on my laptop, in general it seems that everything works fine.
The problem I observe, is when I’m in ubuntu, and I reboot to enter windows, there are configurations that are reset, like configurations with the graphic card (nvidia), sound card or wifi.

Similarly, when I’m in windows and I switch to ubuntu, the first time I log in, the wifi card never works in ubuntu, I have to reboot twice for ubuntu to detect it…

I was reading that this may be due to the UEFI configuration, which should be using legacy mode. Should I format the disk, switch modes, and reinstall windows + ubuntu?

Also, in other computers I’ve had, I used to have problems changing the time, when I changed OS, but in this case, I find it curious to observe that not only the hour changes but also the minutes, I don’t know if it’s something also rare.

I’ve put all the problems together because I don’t know if they are all due to the same mistake…

Thank you very much in advance

Pablo

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Author: Pablo MorPal

Kafka Consumer Error – AVRO with Field Type as a Union of null and boolean

Recently I ran into some issues in consuming Kafka AVRO messages. Everything went well up to the de-serialization of the record from the Kafka topic. It all just went crazy once it was being serialized into JSON. That’s pretty much where the proverbial buck stopped.

I was scratching my head on why this odd behavior was happening. Looking at the message published on the Kafka topic, it was following the defined AVRO schema as expected. There were no deviations.

Somehow when being converted to JSON it started throwing an exception. It was always at the same spot every time. It would not go any further.

Debugging the flow of the program, it showed me that what should have been this:

{
	"fieldOne": "hello world",
	"fieldTwo": true,
	"foobar": false
}

Became something like this:

{
	"fieldOne": "hello world",
	"fieldTwo": true,
	"foobar": {
		"boolean": false
	}
}

And that is why the program was throwing an error!

ANSWER

The solution I did was to remove null as a field type. Set the field to be strictly boolean. What I wanted was to initially have the state of this field as null. Then further down the line it can be set to either true or false.

After the AVRO schema was updated, the error went away.

This was reported to Apache AVRO Jira. More details about this problem here – https://www.joseyamut.xyz/2020/07/29/de-serializing-kafka-messages-with-union-defined-field/

How to partition hard drive in Ubuntu 20.04

I’m literally brand-new to Linux and Ubuntu, so please forgive my ignorance and bear with me here. I purchased a Dell Inspiron 5593 recently and immediately installed Ubuntu 20.04 on it. Long story short, the keyboard is screwed up, and the place I bought it from won’t service Linux OS. Gotta be Windows/Mac OSX for some stupid reason.

So now I’m trying to partition the hard drive and reinstall Windows on the the partition. I’ve checked out GParted, but I haven’t been able to follow the documentation. For example, I don’t see any unallocated space on my disk, and I’m not willing to unmount my main disk without knowing what that will do to my computer.

Honestly at this point I’m ripping my hair out and would just appreciate some clear instructions on how to partition a hard drive in Ubuntu 20.04 because I’m clearly too technically illiterate to understand GParted’s documentation.

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Author: Yehuda

What are the advantages of using AWS nameservers as opposed to servers provided by other registrars?

I am transfering a domain name from namecheap to aws route 53 service. AWS provides you with three options when transfering:

  1. Continue to use the name servers provided by the current registrar or
    DNS service.
  2. Import name servers from a Route 53 hosted zone that has
    the same name as the domain.
  3. Specify new name servers to replace the
    current registrar’s name servers (not recommended)

what is the advantage of using option 2 over the others. What is the difference in pros and cons between the options?

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Author: YulePale

I am completely new to Java 8 and unable to refactor my Java 7 code:

my java 7 code is as below:

List reviewList=new ArrayList<>();

if(!reviewList.isEmpty()  &&  !(reviewList.contains(bookReview.getBookReview().get(0)))) {
    boolean flag=false;

   for(Review review:reviewList)
    {
      if(review.getUserId().equals(bookReview.getBookReview().get(0).getUserId()))
      {
        review.setRating(bookReview.getBookReview().get(0).getRating());
        review.setReviewText(bookReview.getBookReview().get(0).getReviewText());
        review.setBookId(bookReview.getBookReview().get(0).getBookId());
        review.setUserId(bookReview.getBookReview().get(0).getUserId());
        flag=true;
        break;
      }
    }
    if(flag==false)
    {
      reviewList.add(bookReview.getBookReview().get(0));
    }
}

Can anyone please help me

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Author: Tanay Rahangdale

How to do left join , same table with different conditions per column

Hi i need information about how to merge both sentences

Sentence 1

select idlote from polizamovtos group by idlote having sum(cargo)-sum(abono) > 0

Sentence 2

SELECT SUM(cargo) as saldo FROM polizamovtos WHERE FECHAMOVTO='2020-01-01' GROUP BY IDLOTE

sentence 1 is the main filter

Hi, I attach more information

table polizamovtos
enter image description here

Output expected

idlote cargo
1 4000
3 4000
4 5000

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Author: Sergio Rossetti