smr | Scala MapReduce , redux

 by   dlwh Scala Version: Current License: Apache-2.0

kandi X-RAY | smr Summary

kandi X-RAY | smr Summary

smr is a Scala library typically used in Big Data, Spark, Hadoop applications. smr has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

SMR: Scala Map Reduce, redux. This is not the old SMR that was a wrapper for hadoop. You probably shouldn't. You should probably use mesos/spark or scala-hadoop, or something. Because I don't have control over my cluster, so I can't run Spark. Hadoop is really bad for machine learning workflows, and it's a pain to get running if you don't have control over your cluster. I also (mostly) don't need to worry about fault tolerance or such. If that makes you not want to use this, so much the better. I'll add it in as I need it. SMR is designed to be easy to set up (for me!), easy to integrate into your code, and fun to work with. It's going to work like the scala collections framework, just distributed.
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            kandi-support Support

              smr has a low active ecosystem.
              It has 12 star(s) with 1 fork(s). There are 4 watchers for this library.
              OutlinedDot
              It had no major release in the last 6 months.
              smr has no issues reported. There are no pull requests.
              It has a neutral sentiment in the developer community.
              The latest version of smr is current.

            kandi-Quality Quality

              smr has no bugs reported.

            kandi-Security Security

              smr has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

            kandi-License License

              smr is licensed under the Apache-2.0 License. This license is Permissive.
              Permissive licenses have the least restrictions, and you can use them in most projects.

            kandi-Reuse Reuse

              smr releases are not available. You will need to build from source code and install.

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            smr Key Features

            No Key Features are available at this moment for smr.

            smr Examples and Code Snippets

            No Code Snippets are available at this moment for smr.

            Community Discussions

            QUESTION

            tomcat not reading environment variables
            Asked 2021-May-18 at 22:34

            I have a tomcat application running on AKS. I created bunch of environment variables so when tomcat launches, it can replace the value. When I use printenv in the container, it shows all the environment variables set via deployment.yaml.

            However, when tomcat starts, it still doesn't recognizes environment variable, and says something like this:

            ...

            ANSWER

            Answered 2021-May-18 at 22:34

            Tomcat doesn't have anything to do with the replacement of ${...} with the value of the corresponding system environment variable. It only replaces those values in its own configuration files (server.xml, various context.xml descriptors, etc.).

            If you want Spring to replace those property placeholders ${...}, you need to add a PropertySourcesPlaceholderConfigurer to your application context. This can be done through:

            Source https://stackoverflow.com/questions/67594139

            QUESTION

            UBUNTU Minecraft Paper Server Insufficient memory for the Java Runtime Environment
            Asked 2021-Jan-22 at 10:19

            I have a Microsoft Azure VM Instance Running on which I have minecraft paper server installed. Today I'm not able to start the server due to some java error caused while running the server command via ssh-putty.

            Server OS: Ubuntu 18.04.5 LTS

            Minecraft Server Run Commands:

            ...

            ANSWER

            Answered 2021-Jan-22 at 10:05

            Native memory allocation (mmap) failed to map 31138512896 bytes - which is about 31,14G, well above your limit of 29G.

            Source https://stackoverflow.com/questions/65843004

            QUESTION

            csrf toke is not passing to vuejs in laravel 8
            Asked 2020-Dec-08 at 18:34

            I am trying to make an file uploader using vuejs in laravel 8, I am using the following meta tag for this purpose :

            ...

            ANSWER

            Answered 2020-Nov-27 at 19:18

            You should manually pass CSRF token when making a request. Just push the following to every request:

            Source https://stackoverflow.com/questions/65042510

            QUESTION

            Data fetching from database using vuejs in laravel 8
            Asked 2020-Nov-25 at 02:14

            I am trying to fetch data from database using vuejs (in laravel 8 framework ). But it yields no data, no error either. I am sharing some screenshots and codes here :

            View

            Database

            web.php

            ...

            ANSWER

            Answered 2020-Nov-25 at 02:14

            I believe you want the created method to be called when the component is being created. Remove the created function from inside the methods property and add it to the exported default object.

            Source https://stackoverflow.com/questions/64996216

            QUESTION

            pycountry didn't return correct value
            Asked 2020-Jun-23 at 20:53

            I try to find the name of a country through the name of a city. pycountry did the work for me!

            ...

            ANSWER

            Answered 2020-Jun-23 at 20:53

            QUESTION

            Elegant way to import data to a geopandas GeoDataFrame
            Asked 2020-Jun-18 at 18:54

            I have a data source based on ISO3 country codes and I wish to visualize it using geopandas. The source I am using is based on world bank data and contains more countries than the target in GeoDataFrame.

            I used the code below to achieve the visualization I was looking for. Some lines of codes correct missing abbreviations in the world layer (see https://github.com/geopandas/geopandas/issues/1041 for more info).

            Now I have two problems.

            1. (major) The code is not very elegant. Does someone know a more elegant was to import the data into the world GeoDataFrame?
            2. (minor) I get a matplotlib warning I do not understand:

            RuntimeWarning: invalid value encountered in less xa[xa < 0] = -1

            Basic code to reproduce the problem is below. Sorry for the long arrays, but the data is necessary to reproduce the problem.

            ...

            ANSWER

            Answered 2020-Jun-18 at 15:27

            I think you'd benefit from placing your arrays into a dataframe and then merging that with your world geodataframe. So what you have would become:

            Source https://stackoverflow.com/questions/62451805

            QUESTION

            Slow application, frequent JVM hangs with single-CPU setups and Java 12+
            Asked 2020-May-28 at 14:28

            We have a client application (with 10+ years of development). Its JDK was upgraded from OpenJDK 11 to OpenJDK 14 recently. On single-CPU (hyper-threading disabled) Windows 10 setups (and inside VirtualBox machines with only one available CPU) the application starts quite slowly compared to Java 11. Furthermore, it uses 100% CPU most of the time. We could also reproduce the issue with setting the processor affinity to only one CPU (c:\windows\system32\cmd.exe /C start /affinity 1 ...).

            Some measurement with starting the application and doing a query with minimal manual interaction in my VirtualBox machine:

            • OpenJDK 11.0.2: 36 seconds
            • OpenJDK 13.0.2: ~1.5 minutes
            • OpenJDK 13.0.2 with -XX:-UseBiasedLocking: 46 seconds
            • OpenJDK 13.0.2 with -XX:-ThreadLocalHandshakes: 40 seconds
            • OpenJDK 14: 5-6 minutes
            • OpenJDK 14 with -XX:-UseBiasedLocking: 3-3,5 minutes
            • OpenJDK 15 EA Build 20: ~4,5 minutes

            Only the used JDK (and the mentioned options) has been changed. (-XX:-ThreadLocalHandshakes is not available in Java 14.)

            We have tried logging what JDK 14 does with -Xlog:all=debug:file=app.txt:uptime,tid,level,tags:filecount=50.

            Counting the log lines for every second seems quite smooth with OpenJDK 11.0.2:

            ...

            ANSWER

            Answered 2020-May-14 at 09:48

            From my experience performance problems with JDKs are related mostly to one of the following:

            • JIT Compilation
            • VM configuration (heap sizes)
            • GC algorithm
            • Changes in the JVM/JDK which break known good running applications
            • (Oh, and I forgot to mention class loading...)

            If you just use the default JVM configuration since OpenJDK11, maybe you should set some of the more prominent options to fixed values, like GC, Heap size, etc.

            Maybe some graphical analyse tool could help track your issue down. Like Retrace, AppDynamics or FlightRecorder and the like. These give more overview on the overall state of heap, GC cycles, RAM, threads, CPU load and so on at a given time than log files could provide.

            Do I understand correctly that your application writes about 30710 lines to the log within the first second of running (under OpenJDK11)? Why is it "only" writing about 7k lines under OpenJDK14 in the first second? This seems like a huge difference for an application that is just started on different JVMs to me... Are you sure there are not for example high amounts of Exception stacktraces dumped into the log?

            The other numbers are even higher sometimes, so maybe the slowdowns are related to exception logging? Or even swapping, if RAM gets low?

            Actually I am thinking, if an application does not write anything into the log, this is a sign of smooth running without problems (unless it is frozen entirely in this time). What is happening from seconds 12-22 (in the OpenJDK14 case here) is what would concern me more... the logged lines go through the roof... why?

            And afterwards the logging goes down to all time low values of about 1-2k lines... what is the reason for that?? (Well, maybe it is the GC kicking in at second 22 and does a tabula rasa which resolves some things...?)

            Another thing may be your statement about "single CPU" machines. Does this imply "single core" also (Idk, maybe your software is tailored on legacy hardware or something)?

            And the "single CPU" VMs are running on those machines? But I assume, I am wrong about these assumptions, since almost all CPUs are multicore nowadays... but I would investigate on a multithreading issue (deadlock) problem maybe.

            Source https://stackoverflow.com/questions/61375565

            QUESTION

            Does the StringBuffer change the order of JSON?
            Asked 2020-Apr-27 at 13:22

            I'm using StringBuffer to get JSON from a URL.

            This is the original JSON

            ...

            ANSWER

            Answered 2020-Apr-27 at 13:07

            It's not the StringBuffer but the JSONArray.

            The order of elements in an array [] is maintained like the list ["AUT","FRA","SMR","SVN","CHE","VAT"] in both examples.

            Anything as a name value pair surrounded by {} can be reordered like {"code":"EUR","name":"Euro","symbol":"€"} and {"symbol":"\u20ac","code":"EUR","name":"Euro"}.

            To prevent this, you can keep it as a String or create your own object and define the toString method.

            Source https://stackoverflow.com/questions/61459349

            QUESTION

            Java - JSONObject Not Found
            Asked 2020-Apr-26 at 20:13

            I am trying to collect a single piece of data from an API, that being the population of a certain country. Everything works properly except for cutting the population value out of the JSON.

            ...

            ANSWER

            Answered 2020-Apr-26 at 20:13

            QUESTION

            Java COM port listening with RxTx EXCEPTION_ACCESS_VIOLATION
            Asked 2020-Apr-15 at 08:17

            I'm trying to write a java program to read data from a certain COM port (COM3). As a side note: data is sent from a raspberry pi to an XBee. The XBee sends it to another XBee which is connected with a laptop via usb.

            I'm using the java RxTx library to listen to the COM port. The program works fine, but crashes on line 97:

            ...

            ANSWER

            Answered 2020-Apr-15 at 08:17

            So I found a solution. I used the jSerialComm library from fazecast with almost the same code and it worked.

            Source https://stackoverflow.com/questions/61161948

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network

            Vulnerabilities

            No vulnerabilities reported

            Install smr

            You can download it from GitHub.

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