Re: Having multiple spark context

A clustering lib is necessary to manage multiple jvm. Akka cluster for instance Le 30 janv. 2017 8:01 AM, "Rohit Verma" a écrit : > Hi, > > If I am right, you need to launch other context from another jvm. If you > are trying to launch from same jvm another context it

Re: Having multiple spark context

Hi, If I am right, you need to launch other context from another jvm. If you are trying to launch from same jvm another context it will return you the existing context. Rohit On Jan 30, 2017, at 12:24 PM, Mark Hamstra > wrote: More than

Re: Having multiple spark context

More than one Spark Context in a single Application is not supported. On Sun, Jan 29, 2017 at 9:08 PM, wrote: > Hi, > > > > I have a requirement in which, my application creates one Spark context in > Distributed mode whereas another Spark context in local mode. > >

Failures on JavaSparkContext. - "Futures timed out after [10000 milliseconds]"

Hi, I sometimes get these Random init failures in test and prod. Is there a use case that could lead to these errors? For example: Not enough cores? driver and worker not on the same LAN? etc... Running Spark 1.5.1. Retrying solves it. Caused by: java.util.concurrent.TimeoutException: Futures

Re: Error Saving Dataframe to Hive with Spark 2.0.0

Okey, you are saying that 2.0.0 don't have that patch fixed ? @dev cc-- I don't like everytime changing the service versions ! Thanks. On Mon, Jan 30, 2017 at 1:10 AM, Jacek Laskowski wrote: > Hi, > > I think you have to upgrade to 2.1.0. There were few changes wrt the ERROR >

No Reducer scenarios

Dear all, 1) When we don't set the reducer class in driver program, IdentityReducer is invoked. 2) When we set setNumReduceTasks(0), no reducer, even IdentityReducer is invoked. Now, in the second scenario, we observed that the output is part-m-xx format(instead of part-r-xx format) , which

Having multiple spark context

Hi, I have a requirement in which, my application creates one Spark context in Distributed mode whereas another Spark context in local mode. When I am creating this, my complete application is working on only one SparkContext (created in Distributed mode). Second spark context is not getting

Re: question on spark streaming based on event time

Hi, I am sorry I made a really bad Typo. What I meant in my email was actually structured streaming so I wish I could do s/Spark Streaming/Structured Streaming/g. Thanks for the pointers looks like what I was looking for is actually watermarking since my question is all about what I should do if

Streaming jobs getting longer

Hi, I have 2 spark pipeline applications almost identical, but I found out a significant difference between their performance. Basically the 1st application consumes the streaming from Kafka, slice this streaming in batches of 1 minute and for each record calculates a score given the already

Re: question on spark streaming based on event time

Spark Streaming (DStreams) wasnt designed keeping event-time in mind. Instead, we have designed Structured Streaming to naturally deal with event time. You should check that out. Here are the pointers. - Programming guide -

Re: Error Saving Dataframe to Hive with Spark 2.0.0

Hi, I think you have to upgrade to 2.1.0. There were few changes wrt the ERROR since. Jacek On 29 Jan 2017 9:24 a.m., "Chetan Khatri" wrote: Hello Spark Users, I am getting error while saving Spark Dataframe to Hive Table: Hive 1.2.1 Spark 2.0.0 Local

Re: Examples in graphx

Which graph do you are thinking about? Here's one for neo4j https://neo4j.com/blog/neo4j-3-0-apache-spark-connector/ From: Deepak Sharma Sent: Sunday, January 29, 2017 4:28:19 AM To: spark users Subject: Examples in graphx Hi There, Are

Re: Aggregator mutate b1 in place in merge

thanks thats helpful On Sun, Jan 29, 2017 at 12:54 PM, Anton Okolnychyi < anton.okolnyc...@gmail.com> wrote: > Hi, > > I recently extended the Spark SQL programming guide to cover user-defined > aggregations, where I modified existing variables and returned them back in > reduce and merge. This

RE: forcing dataframe groupby partitioning

Could you explain why this would work? Assaf. From: Haviv, Daniel [mailto:dha...@amazon.com] Sent: Sunday, January 29, 2017 7:09 PM To: Mendelson, Assaf Cc: user@spark.apache.org Subject: Re: forcing dataframe groupby partitioning If there's no built in local groupBy, You could do something like

Re: Aggregator mutate b1 in place in merge

Hi, I recently extended the Spark SQL programming guide to cover user-defined aggregations, where I modified existing variables and returned them back in reduce and merge. This approach worked and it was approved by people who know the context. Hope that helps. 2017-01-29 17:17 GMT+01:00 Koert

Re: forcing dataframe groupby partitioning

If there's no built in local groupBy, You could do something like that: df.groupby(C1,C2).agg(...).flatmap(x=>x.groupBy(C1)).agg Thank you. Daniel On 29 Jan 2017, at 18:33, Mendelson, Assaf > wrote: Hi, Consider the following example:

forcing dataframe groupby partitioning

Hi, Consider the following example: df.groupby(C1,C2).agg(some agg).groupby(C1).agg(some more agg) The default way spark would behave would be to shuffle according to a combination of C1 and C2 and then shuffle again by C1 only. This behavior makes sense when one uses C2 to salt C1 for

Re: Aggregator mutate b1 in place in merge

anyone? it not i will follow the trail and try to deduce it myself On Mon, Jan 23, 2017 at 2:31 PM, Koert Kuipers wrote: > looking at the docs for org.apache.spark.sql.expressions.Aggregator it > says for reduce method: "For performance, the function may modify `b` and >

Re: Hbase and Spark

Hi Masf, Do try the official Hbase Spark. https://hbase.apache.org/book.html#spark I think you will have to build the jar from source and run your spark program with --packages . https://spark-packages.org/package/hortonworks-spark/shc says it's not yet published to Spark packages or Maven Repo.

Re: spark architecture question -- Pleas Read

Sorry mistake 1. Put the csv files into HDFS /apps//data/staging/ 2. Multiple csv files for the same table can co-exist 3. like val df1 = spark.read.option("header", false).csv(location) 4. once the csv file read into df then you can do loads of things. The csv files have to

Re: spark architecture question -- Pleas Read

you can use Spark directly on csv file. 1. Put the csv files into HDFS /apps//data/staging/ 2. Multiple csv files for the same table can co-exist 3. like df1 = spark.read.option("header", false).csv(location) 4. Dr Mich Talebzadeh LinkedIn *

Re: spark architecture question -- Pleas Read

But for persistance after intermediate processing can i use spark cluster itself or i have to use hadoop cluster?! On Jan 29, 2017 7:36 PM, "Deepak Sharma" wrote: The better way is to read the data directly into spark using spark sql read jdbc . Apply the udf's locally .

Re: spark architecture question -- Pleas Read

I meant with distributed file system such as Ceph, Gluster etc... > On 29 Jan 2017, at 14:45, Jörn Franke wrote: > > One alternative could be the oracle Hadoop loader and other Oracle products, > but you have to invest some money and probably buy their Hadoop Appliance,

Re: spark architecture question -- Pleas Read

The better way is to read the data directly into spark using spark sql read jdbc . Apply the udf's locally . Then save the data frame back to Oracle using dataframe's write jdbc. Thanks Deepak On Jan 29, 2017 7:15 PM, "Jörn Franke" wrote: > One alternative could be the

nvitation to speak about GraphX at London Opensource Graph Technologies Meetup

Hi everyone, We're starting a new meetup in London: Opensource Graph Technologies. Our goal is to increase the awareness of opensource graph technologies and their applications to the London developer community. In the past week, there have been 119 people signing up to the group, and we're

Re: spark architecture question -- Pleas Read

One alternative could be the oracle Hadoop loader and other Oracle products, but you have to invest some money and probably buy their Hadoop Appliance, which you have to evaluate if it make sense (can get expensive with large clusters etc). Another alternative would be to get rid of Oracle

Examples in graphx

Hi There, Are there any examples of using GraphX along with any graph DB? I am looking to persist the graph in graph based DB and then read it back in spark , process using graphx. -- Thanks Deepak www.bigdatabig.com www.keosha.net

Hbase and Spark

I´m trying to build an application where is necessary to do bulkGets and bulkLoad on Hbase. I think that I could use this component https://github.com/hortonworks-spark/shc *Is it a good option??* But* I can't import it in my project*. Sbt cannot resolve hbase connector This is my build.sbt:

Re: spark architecture question -- Pleas Read

This is classis nothing special about it. 1. You source is Oracle schema tables 2. You can use Oracle JDBC connection with DIRECT CONNECT and parallel processing to read your data from Oracle table into Spark FP using JDBC. Ensure that you are getting data from Oracle DB at a time

Re: spark architecture question -- Pleas Read

Hi All, Thanks for your response .. Please find below flow diagram Please help me out simplifying this architecture using Spark 1) Can i skip step 1 to step 4 and directly store it in spark if I am storing it in spark where actually it is getting stored Do i need to retain HAdoop to store data

Error Saving Dataframe to Hive with Spark 2.0.0

Hello Spark Users, I am getting error while saving Spark Dataframe to Hive Table: Hive 1.2.1 Spark 2.0.0 Local environment. Note: Job is getting executed successfully and the way I want but still Exception raised. *Source Code:* package com.chetan.poc.hbase /** * Created by chetan on 24/1/17.