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I'm trying to run this example (https://github.com/xinwucwp/mhe) on netbeans 8.2 + jython module (ver. 2.7.2). I created a new jython project and added a start.py file with code from demo2.py (from example), here the full file - https://pastebin.com/DqBrDmnN.

As i understand, i have to add path to java classes - *.jar files.

After that, i tried to run it and got the following error - from edu.mines.jtk.ogl.Gl import * java.lang.NoClassDefFoundError: com/jogamp/opengl/GLArrayData, although i've already added jogl-all.jar, which includes GLArrayData.class.

I am very new to Kafka Streams and I tried creating a poc to see if it suits my use case.

I have a topic in which I am producing some reference data. This data is then streamed and converted to a GlobalKTable CPK (I used a GlobalKTable as I need to join on non-keys). Once this processing is done. I then start populating another topic which then streams (SPT) the data and does an inner join on CPK to produce another GlobalKTable (JTK).

CPK and SPT are both feeds coming from an external system.

Now I have real time data coming in that I need to look up the reference data that I just populated. Let's say this stream is called "Real". Real then does an inner join with JTK and we actually are getting good results.

Problem is when I need to delete a row from CPK. I pass a key with null value and I expect it to delete this value from CPK and the he change to also propagate to JTK. So any JTK record with that key should be deleted. But this is not happening.

Is this doable? Am I thinking in the right way? Should I use KSQL?

Thanks all in advance.

I am trying to use this class, but i'm having trouble importing it into my code. Anyone know it's not allowing me to import it? It is giving me a "Cannot resolve symbol 'edu'"

Let me be more specific about my question with an example: Let's say that I have a slew of little servers that all start up on different ports using TCPv4. These ports are going to be destination ports, of course. Let's further assume that these little servers don't just start up at boot time like a typical server, but rather they churn dynamically based on demand. They start up when needed, and may shut themselves down for a while, and then later start up again.

Now let's say that on this same computer, we also have lots of client processes making requests to server processes on other computers via TCPv4. When a client makes such a request, it is assigned a source port by the OS.

Let's say for the sake of this example that a client processes makes a web request to a RESTful server running on a different computer. Let's also say that the source port assigned by the OS to this request is port 7777.

For this example let's also say that while the above request is still occurring, one of our little servers wants to start up, and it wants to start up on destination port 7777.

My question is will this cause a conflict? I.e., will the server get an error because port 7777 is already in use? Or will everything be fine because these two different kinds of ports live in different address spaces that cannot conflict with each other?

One reason I'm worried about the potential for conflict here is that I've seen web pages that say that "ephemeral source port selection" is typically done in a port number range that begins at a relatively high number. Here is such a web page:

https://www.cymru.com/jtk/misc/ephemeralports.html

A natural assumption for why source ports would begin at high numbers, rather than just starting at 1, is to avoid conflict with the destination ports used by server processes. Though I haven't yet seen anything that explicitly comes out and says that this is the case.

P.S. There is, of course, a potential distinction between what the TCPv4 protocol spec has to say on this issue, and what OSes actually do. E.g., perhaps the protocol is agnostic, but OSes tend to only use a single address space? Or perhaps different OSes treat the issue differently?

Personally, I'm most interested at the moment in what Linux would do.

I have tables that are connected to each other. When the user clicks on settings icon, I find out how many connections does clicked table has, save that information and then redirect the page like this: