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Raymond Tang

Big Data Engineer, Full Stack .NET and Cross-Platform Software Engineer/Architect

I'm passionate about building data driven, scalable, cloud native applications and products.

Microsoft MVP C#/.NET (2010-2016)/Visual Studio | MCP | MCSE: Data Management and Analytics | Google Cloud Platform Certified Professional Data Engineer

LinkedIn MVP Reconnect

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Posts

Differences between Hive External and Internal (Managed) Tables

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access_time 4 days ago

In Hive, there are two types of tables can be created - internal and external table. Internal tables are also called managed tables. Different features are available to different types. This article lists some of the common differences.  Internal table By default, Hive creates ...

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Spark Read from SQL Server Source using Windows/Kerberos Authentication

Spark Read from SQL Server Source using Windows/Kerberos Authentication

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access_time 23 days ago

In this article, I am going to show you how to use JDBC Kerberos authentication to connect to SQL Server sources in Spark (PySpark). I will use  Kerberos connection with principal names and password directly that requires  ...

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Schema Merging (Evolution) with Parquet in Spark and Hive

Schema Merging (Evolution) with Parquet in Spark and Hive

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access_time 24 days ago

Schema evolution is supported by many frameworks or data serialization systems such as Avro, Orc, Protocol Buffer and Parquet. With schema evolution, one set of data can be stored in multiple files with different but compatible schema. In Spark, Parquet data source can detect and merge schema ...

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Fix for Hadoop 3.2.1 namenode format issue on Windows 10

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access_time 2 months ago

Issue When installing Hadoop 3.2.1 on Windows 10,  you may encounter the following error when trying to format HDFS  namnode: ERROR namenode.NameNode: Failed to start namenode. The error happens when running the following comm...

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Compile and Build Hadoop 3.2.1 on Windows 10 Guide

Compile and Build Hadoop 3.2.1 on Windows 10 Guide

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access_time 2 months ago

This article provides detailed steps about how to compile and build Hadoop (incl. native libs) on Windows 10. The following guide is based on Hadoop release 3.2.1. ...

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Install Latest Hadoop 3.2.1 on Windows 10 Step by Step Guide

Install Latest Hadoop 3.2.1 on Windows 10 Step by Step Guide

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access_time 2 months ago

This detailed step-by-step guide shows you how to install the latest Hadoop (v3.2.1) on Windows 10. It also provides a temporary fix for bug HDFS-14084 (java.lang.UnsupportedOperationException INFO).

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Machine Learning with .NET in Jupyter Notebooks

Machine Learning with .NET in Jupyter Notebooks

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access_time 2 months ago

In this article, I'm going to show you how to install Jupyter in Windows and then install .NET kernel for Jupyter notebooks. It also shows a machine learning example using ML.NET. The target audience are .NET developers who want to expand their skills in data engineering and science domain...

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PySpark: Convert Python Dictionary List to Spark DataFrame

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access_time 2 months ago

This articles show you how to convert a Python dictionary list to a Spark DataFrame. The code snippets runs on Spark 2.x environments. Input The input data (dictionary list looks like the following): data = [{"Category": 'Category A', 'ItemID': 1, 'Amount': 12.40}, ...

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Improve PySpark Performance using Pandas UDF with Apache Arrow

Improve PySpark Performance using Pandas UDF with Apache Arrow

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access_time 2 months ago

Apache Arrow is an in-memory columnar data format that can be used in Spark to efficiently transfer data between JVM and Python processes. This currently is most beneficial to Python users that work with Pandas/NumPy data. In this article, ...

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Read and Write XML files in PySpark

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access_time 2 months ago

This article shows you how to read and write XML files in Spark. Sample XML file Create a sample XML file named test.xml with the following content: <?xml version="1.0"?> <data> <record id="1"> <rid>1</rid> <nam...

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Comments

Re: Latest Hadoop 3.2.1 Installation on Windows 10 Step by Step Guide

21 days ago

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I'm glad it worked. I also updated the page to reflect the JDK requirement.

BTW, if you want to build a native Hadoop 3.2.1 on Windows, you can follow this guide:

Compile and Build Hadoop 3.2.1 on Windows 10 Guide

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person Matthias access_time 22 days ago
Re: Latest Hadoop 3.2.1 Installation on Windows 10 Step by Step Guide

Hello Raymond,

you nailed it! Everything works fine now (except, I feel somewhat stupid, for I knew about JDK8, but for some reason assumed this to be but a minimum requirement. It didn't occur to me to revert to the older version. Let's hope, this will save someone at least something.)

Thanks a lot!

Cheers,
Matthias

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Re: Install Hadoop 3.0.0 on Windows (Single Node)

29 days ago

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Apologies for the late reply. Have you got your problem resolved?

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person U-7e9qo64lwkem90f8 access_time 6 months ago
Re: Install Hadoop 3.0.0 in Windows (Single Node)

@Raymond Tang I run in console. i did not do double click on the cmd file.

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Re: Latest Hadoop 3.2.1 Installation on Windows 10 Step by Step Guide

29 days ago

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Hi Matthias,

As far as I know, JDK 13.0.1 is not supported.

Please use JDK 1.8.x, it will work.

Even JDK 11 support is still in progress.

https://cwiki.apache.org/confluence/display/HADOOP/Hadoop+Java+Versions

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person Matthias access_time 2 months ago
Re: Latest Hadoop 3.2.1 Installation on Windows 10 Step by Step Guide

Hi Raymond!

First of all: many thanks – a great how-to saving me hours! Well, almost, that is.

I tried to install Hadoop 3.2.1 using your article. Everything went like a charm, I did encounter the problem mentioned when formatting the HDFS, the workaround worked fine.

However, when I reached Step 10 (launch YARN), both command windows run into a runtime exception. (See below)

The OS is a Windows 10 Edu N (english) and is up to date (as of today, Jan 25). The JDK is 13.0.1.

Any hint would be very much appreciated, as I'm far from being able to make sense of the messages!

Cheers from Vienna/Austria
Matthew

2020-01-25 15:54:39,323 INFO resourcemanager.ResourceManager: STARTUP_MSG:
/************************************************************
STARTUP_MSG: Starting ResourceManager
STARTUP_MSG:   host = pitdb/10.0.2.15
STARTUP_MSG:   args = []
STARTUP_MSG:   version = 3.2.1
STARTUP_MSG:   classpath = 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\timelineservice\hadoop-yarn-server-timelineservice-hbase-common-3.2.1.jar;C:\hadoop-3.2.1\share\hadoop\yarn\timelineservice\hadoop-yarn-server-timelineservice-hbase-coprocessor-3.2.1.jar;C:\hadoop-3.2.1\share\hadoop\yarn\timelineservice\lib\commons-csv-1.0.jar;C:\hadoop-3.2.1\share\hadoop\yarn\timelineservice\lib\commons-lang-2.6.jar;C:\hadoop-3.2.1\share\hadoop\yarn\timelineservice\lib\hbase-annotations-1.2.6.jar;C:\hadoop-3.2.1\share\hadoop\yarn\timelineservice\lib\hbase-client-1.2.6.jar;C:\hadoop-3.2.1\share\hadoop\yarn\timelineservice\lib\hbase-common-1.2.6.jar;C:\hadoop-3.2.1\share\hadoop\yarn\timelineservice\lib\hbase-protocol-1.2.6.jar;C:\hadoop-3.2.1\share\hadoop\yarn\timelineservice\lib\htrace-core-3.1.0-incubating.jar;C:\hadoop-3.2.1\share\hadoop\yarn\timelineservice\lib\jcodings-1.0.13.jar;C:\hadoop-3.2.1\share\hadoop\yarn\timelineservice\lib\joni-2.1.2.jar;C:\hadoop-3.2.1\share\hadoop\yarn\timelineservice\lib\metrics-core-2.2.0.jar
STARTUP_MSG:   build = https://gitbox.apache.org/repos/asf/hadoop.git -r b3cbbb467e22ea829b3808f4b7b01d07e0bf3842; compiled by 'rohithsharmaks' on 2019-09-10T15:56Z
STARTUP_MSG:   java = 13.0.1
************************************************************/
2020-01-25 15:54:41,357 INFO conf.Configuration: found resource core-site.xml at file:/C:/hadoop-3.2.1/etc/hadoop/core-site.xml
2020-01-25 15:54:42,042 INFO conf.Configuration: resource-types.xml not found
2020-01-25 15:54:42,042 INFO resource.ResourceUtils: Unable to find 'resource-types.xml'.
2020-01-25 15:54:42,386 INFO conf.Configuration: found resource yarn-site.xml at file:/C:/hadoop-3.2.1/etc/hadoop/yarn-site.xml
2020-01-25 15:54:42,542 INFO event.AsyncDispatcher: Registering class org.apache.hadoop.yarn.server.resourcemanager.RMFatalEventType for class org.apache.hadoop.yarn.server.resourcemanager.ResourceManager$RMFatalEventDispatcher
2020-01-25 15:54:42,698 INFO security.NMTokenSecretManagerInRM: NMTokenKeyRollingInterval: 86400000ms and NMTokenKeyActivationDelay: 900000ms
2020-01-25 15:54:42,714 INFO security.RMContainerTokenSecretManager: ContainerTokenKeyRollingInterval: 86400000ms and ContainerTokenKeyActivationDelay: 900000ms
2020-01-25 15:54:42,730 INFO security.AMRMTokenSecretManager: AMRMTokenKeyRollingInterval: 86400000ms and AMRMTokenKeyActivationDelay: 900000 ms
2020-01-25 15:54:42,792 INFO event.AsyncDispatcher: Registering class org.apache.hadoop.yarn.server.resourcemanager.recovery.RMStateStoreEventType for class org.apache.hadoop.yarn.server.resourcemanager.recovery.RMStateStore$ForwardingEventHandler
2020-01-25 15:54:42,792 INFO event.AsyncDispatcher: Registering class org.apache.hadoop.yarn.server.resourcemanager.NodesListManagerEventType for class org.apache.hadoop.yarn.server.resourcemanager.NodesListManager
2020-01-25 15:54:42,839 INFO resourcemanager.ResourceManager: Using Scheduler: org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler
2020-01-25 15:54:42,979 INFO event.AsyncDispatcher: Registering class org.apache.hadoop.yarn.server.resourcemanager.scheduler.event.SchedulerEventType for class org.apache.hadoop.yarn.event.EventDispatcher
2020-01-25 15:54:43,026 INFO event.AsyncDispatcher: Registering class org.apache.hadoop.yarn.server.resourcemanager.rmapp.RMAppEventType for class org.apache.hadoop.yarn.server.resourcemanager.ResourceManager$ApplicationEventDispatcher
2020-01-25 15:54:43,104 INFO event.AsyncDispatcher: Registering class org.apache.hadoop.yarn.server.resourcemanager.rmapp.attempt.RMAppAttemptEventType for class org.apache.hadoop.yarn.server.resourcemanager.ResourceManager$ApplicationAttemptEventDispatcher
2020-01-25 15:54:43,104 INFO event.AsyncDispatcher: Registering class org.apache.hadoop.yarn.server.resourcemanager.rmnode.RMNodeEventType for class org.apache.hadoop.yarn.server.resourcemanager.ResourceManager$NodeEventDispatcher
2020-01-25 15:54:43,666 INFO impl.MetricsConfig: Loaded properties from hadoop-metrics2.properties
2020-01-25 15:54:44,025 INFO impl.MetricsSystemImpl: Scheduled Metric snapshot period at 10 second(s).
2020-01-25 15:54:44,042 INFO impl.MetricsSystemImpl: ResourceManager metrics system started
2020-01-25 15:54:44,119 INFO security.YarnAuthorizationProvider: org.apache.hadoop.yarn.security.ConfiguredYarnAuthorizer is instantiated.
2020-01-25 15:54:44,151 INFO event.AsyncDispatcher: Registering class org.apache.hadoop.yarn.server.resourcemanager.RMAppManagerEventType for class org.apache.hadoop.yarn.server.resourcemanager.RMAppManager
2020-01-25 15:54:44,166 INFO event.AsyncDispatcher: Registering class org.apache.hadoop.yarn.server.resourcemanager.amlauncher.AMLauncherEventType for class org.apache.hadoop.yarn.server.resourcemanager.amlauncher.ApplicationMasterLauncher
2020-01-25 15:54:44,182 INFO resourcemanager.RMNMInfo: Registered RMNMInfo MBean
2020-01-25 15:54:44,198 INFO monitor.RMAppLifetimeMonitor: Application lifelime monitor interval set to 3000 ms.
2020-01-25 15:54:44,198 INFO placement.MultiNodeSortingManager: Initializing NodeSortingService=MultiNodeSortingManager
2020-01-25 15:54:44,261 INFO util.HostsFileReader: Refreshing hosts (include/exclude) list
2020-01-25 15:54:44,308 INFO conf.Configuration: found resource capacity-scheduler.xml at file:/C:/hadoop-3.2.1/etc/hadoop/capacity-scheduler.xml
2020-01-25 15:54:44,448 INFO scheduler.AbstractYarnScheduler: Minimum allocation = <memory:1024, vCores:1>
2020-01-25 15:54:44,464 INFO scheduler.AbstractYarnScheduler: Maximum allocation = <memory:8192, vCores:4>
2020-01-25 15:54:44,605 INFO capacity.CapacitySchedulerConfiguration: max alloc mb per queue for root is undefined
2020-01-25 15:54:44,682 INFO capacity.CapacitySchedulerConfiguration: max alloc vcore per queue for root is undefined
2020-01-25 15:54:44,776 INFO capacity.ParentQueue: root, capacity=1.0, absoluteCapacity=1.0, maxCapacity=1.0, absoluteMaxCapacity=1.0, state=RUNNING, acls=ADMINISTER_QUEUE:*SUBMIT_APP:*, labels=*,
, reservationsContinueLooking=true, orderingPolicy=utilization, priority=0
2020-01-25 15:54:44,808 INFO capacity.ParentQueue: Initialized parent-queue root name=root, fullname=root
2020-01-25 15:54:44,902 INFO capacity.CapacitySchedulerConfiguration: max alloc mb per queue for root.default is undefined
2020-01-25 15:54:45,011 INFO capacity.CapacitySchedulerConfiguration: max alloc vcore per queue for root.default is undefined
2020-01-25 15:54:45,089 INFO capacity.LeafQueue: Initializing default
capacity = 1.0 [= (float) configuredCapacity / 100 ]
absoluteCapacity = 1.0 [= parentAbsoluteCapacity * capacity ]
maxCapacity = 1.0 [= configuredMaxCapacity ]
absoluteMaxCapacity = 1.0 [= 1.0 maximumCapacity undefined, (parentAbsoluteMaxCapacity * maximumCapacity) / 100 otherwise ]
effectiveMinResource=<memory:0, vCores:0>
 , effectiveMaxResource=<memory:0, vCores:0>
userLimit = 100 [= configuredUserLimit ]
userLimitFactor = 1.0 [= configuredUserLimitFactor ]
maxApplications = 10000 [= configuredMaximumSystemApplicationsPerQueue or (int)(configuredMaximumSystemApplications * absoluteCapacity)]
maxApplicationsPerUser = 10000 [= (int)(maxApplications * (userLimit / 100.0f) * userLimitFactor) ]
usedCapacity = 0.0 [= usedResourcesMemory / (clusterResourceMemory * absoluteCapacity)]
absoluteUsedCapacity = 0.0 [= usedResourcesMemory / clusterResourceMemory]
maxAMResourcePerQueuePercent = 0.1 [= configuredMaximumAMResourcePercent ]
minimumAllocationFactor = 0.875 [= (float)(maximumAllocationMemory - minimumAllocationMemory) / maximumAllocationMemory ]
maximumAllocation = <memory:8192, vCores:4> [= configuredMaxAllocation ]
numContainers = 0 [= currentNumContainers ]
state = RUNNING [= configuredState ]
acls = ADMINISTER_QUEUE:*SUBMIT_APP:* [= configuredAcls ]
nodeLocalityDelay = 40
rackLocalityAdditionalDelay = -1
labels=*,
reservationsContinueLooking = true
preemptionDisabled = true
defaultAppPriorityPerQueue = 0
priority = 0
maxLifetime = -1 seconds
defaultLifetime = -1 seconds
2020-01-25 15:54:45,152 INFO capacity.CapacitySchedulerQueueManager: Initialized queue: default: capacity=1.0, absoluteCapacity=1.0, usedResources=<memory:0, vCores:0>, usedCapacity=0.0, absoluteUsedCapacity=0.0, numApps=0, numContainers=0, effectiveMinResource=<memory:0, vCores:0> , effectiveMaxResource=<memory:0, vCores:0>
2020-01-25 15:54:45,167 INFO capacity.CapacitySchedulerQueueManager: Initialized queue: root: numChildQueue= 1, capacity=1.0, absoluteCapacity=1.0, usedResources=<memory:0, vCores:0>usedCapacity=0.0, numApps=0, numContainers=0
2020-01-25 15:54:45,167 INFO capacity.CapacitySchedulerQueueManager: Initialized root queue root: numChildQueue= 1, capacity=1.0, absoluteCapacity=1.0, usedResources=<memory:0, vCores:0>usedCapacity=0.0, numApps=0, numContainers=0
2020-01-25 15:54:45,167 INFO placement.UserGroupMappingPlacementRule: Initialized queue mappings, override: false
2020-01-25 15:54:45,167 INFO placement.MultiNodeSortingManager: MultiNode scheduling is 'false', and configured policies are
2020-01-25 15:54:45,197 INFO capacity.CapacityScheduler: Initialized CapacityScheduler with calculator=class org.apache.hadoop.yarn.util.resource.DefaultResourceCalculator, minimumAllocation=<<memory:1024, vCores:1>>, maximumAllocation=<<memory:8192, vCores:4>>, asynchronousScheduling=false, asyncScheduleInterval=5ms,multiNodePlacementEnabled=false
2020-01-25 15:54:45,197 INFO conf.Configuration: dynamic-resources.xml not found
2020-01-25 15:54:45,213 INFO resourcemanager.AMSProcessingChain: Initializing AMS Processing chain. Root Processor=[org.apache.hadoop.yarn.server.resourcemanager.DefaultAMSProcessor].
2020-01-25 15:54:45,213 INFO resourcemanager.ApplicationMasterService: disabled placement handler will be used, all scheduling requests will be rejected.
2020-01-25 15:54:45,213 INFO resourcemanager.AMSProcessingChain: Adding [org.apache.hadoop.yarn.server.resourcemanager.scheduler.constraint.processor.DisabledPlacementProcessor] tp top of AMS Processing chain.
2020-01-25 15:54:45,229 INFO resourcemanager.ResourceManager: TimelineServicePublisher is not configured
2020-01-25 15:54:45,291 INFO util.log: Logging initialized @8928ms
2020-01-25 15:54:45,400 INFO server.AuthenticationFilter: Unable to initialize FileSignerSecretProvider, falling back to use random secrets.
2020-01-25 15:54:45,417 INFO http.HttpRequestLog: Http request log for http.requests.resourcemanager is not defined
2020-01-25 15:54:45,432 INFO http.HttpServer2: Added global filter 'safety' (class=org.apache.hadoop.http.HttpServer2$QuotingInputFilter)
2020-01-25 15:54:45,432 INFO http.HttpServer2: Added filter RMAuthenticationFilter (class=org.apache.hadoop.yarn.server.security.http.RMAuthenticationFilter) to context cluster
2020-01-25 15:54:45,432 INFO http.HttpServer2: Added filter RMAuthenticationFilter (class=org.apache.hadoop.yarn.server.security.http.RMAuthenticationFilter) to context static
2020-01-25 15:54:45,432 INFO http.HttpServer2: Added filter RMAuthenticationFilter (class=org.apache.hadoop.yarn.server.security.http.RMAuthenticationFilter) to context logs
2020-01-25 15:54:45,448 INFO http.HttpServer2: Added filter static_user_filter (class=org.apache.hadoop.http.lib.StaticUserWebFilter$StaticUserFilter) to context cluster
2020-01-25 15:54:45,448 INFO http.HttpServer2: Added filter static_user_filter (class=org.apache.hadoop.http.lib.StaticUserWebFilter$StaticUserFilter) to context static
2020-01-25 15:54:45,448 INFO http.HttpServer2: Added filter static_user_filter (class=org.apache.hadoop.http.lib.StaticUserWebFilter$StaticUserFilter) to context logs
2020-01-25 15:54:45,448 INFO http.HttpServer2: adding path spec: /cluster/*
2020-01-25 15:54:45,448 INFO http.HttpServer2: adding path spec: /ws/*
2020-01-25 15:54:45,448 INFO http.HttpServer2: adding path spec: /app/*
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.google.inject.internal.cglib.core.$ReflectUtils$2 (file:/C:/hadoop-3.2.1/share/hadoop/yarn/lib/guice-4.0.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java.security.ProtectionDomain)
WARNING: Please consider reporting this to the maintainers of com.google.inject.internal.cglib.core.$ReflectUtils$2
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
2020-01-25 15:54:47,277 INFO webapp.WebApps: Registered webapp guice modules
2020-01-25 15:54:47,402 INFO http.HttpServer2: Jetty bound to port 8088
2020-01-25 15:54:47,574 INFO server.Server: jetty-9.3.24.v20180605, build timestamp: 2018-06-05T19:11:56+02:00, git hash: 84205aa28f11a4f31f2a3b86d1bba2cc8ab69827
2020-01-25 15:54:47,885 INFO server.AuthenticationFilter: Unable to initialize FileSignerSecretProvider, falling back to use random secrets.
2020-01-25 15:54:47,964 INFO delegation.AbstractDelegationTokenSecretManager: Updating the current master key for generating delegation tokens
2020-01-25 15:54:48,057 INFO delegation.AbstractDelegationTokenSecretManager: Starting expired delegation token remover thread, tokenRemoverScanInterval=60 min(s)
2020-01-25 15:54:48,136 INFO handler.ContextHandler: Started o.e.j.s.ServletContextHandler@53ab0286{/logs,file:///C:/hadoop-3.2.1/logs/,AVAILABLE}
2020-01-25 15:54:48,230 INFO delegation.AbstractDelegationTokenSecretManager: Updating the current master key for generating delegation tokens
2020-01-25 15:54:48,479 INFO handler.ContextHandler: Started o.e.j.s.ServletContextHandler@2ce86164{/static,jar:file:/C:/hadoop-3.2.1/share/hadoop/yarn/hadoop-yarn-common-3.2.1.jar!/webapps/static,AVAILABLE}
Jõn. 25, 2020 3:54:49 PM com.sun.jersey.guice.spi.container.GuiceComponentProviderFactory register
INFO: Registering org.apache.hadoop.yarn.server.resourcemanager.webapp.JAXBContextResolver as a provider class
Jõn. 25, 2020 3:54:49 PM com.sun.jersey.guice.spi.container.GuiceComponentProviderFactory register
INFO: Registering org.apache.hadoop.yarn.server.resourcemanager.webapp.RMWebServices as a root resource class
Jõn. 25, 2020 3:54:49 PM com.sun.jersey.guice.spi.container.GuiceComponentProviderFactory register
INFO: Registering org.apache.hadoop.yarn.webapp.GenericExceptionHandler as a provider class
Jõn. 25, 2020 3:54:49 PM com.sun.jersey.server.impl.application.WebApplicationImpl _initiate
INFO: Initiating Jersey application, version 'Jersey: 1.19 02/11/2015 03:25 AM'
Jõn. 25, 2020 3:54:50 PM com.sun.jersey.guice.spi.container.GuiceComponentProviderFactory getComponentProvider
INFO: Binding org.apache.hadoop.yarn.server.resourcemanager.webapp.JAXBContextResolver to GuiceManagedComponentProvider with the scope "Singleton"
2020-01-25 15:54:50,729 WARN webapp.WebAppContext: Failed startup of context o.e.j.w.WebAppContext@4422dd48{/,file:///C:/Users/user/AppData/Local/Temp/jetty-0.0.0.0-8088-cluster-_-any-4591039387602299968.dir/webapp/,UNAVAILABLE}{/cluster}
com.google.inject.ProvisionException: Unable to provision, see the following errors:

1) Error injecting constructor, java.lang.NoClassDefFoundError: javax/activation/DataSource
  at org.apache.hadoop.yarn.server.resourcemanager.webapp.JAXBContextResolver.<init>(JAXBContextResolver.java:41)
  at org.apache.hadoop.yarn.server.resourcemanager.webapp.RMWebApp.setup(RMWebApp.java:54)
  while locating org.apache.hadoop.yarn.server.resourcemanager.webapp.JAXBContextResolver

1 error
        at com.google.inject.internal.InjectorImpl$2.get(InjectorImpl.java:1025)
        at com.google.inject.internal.InjectorImpl.getInstance(InjectorImpl.java:1051)

reply Reply

Re: SQLite in .NET Core with Entity Framework Core

4 months ago

more_vert

Hello,

I didn’t quite get this. Can you be more specific? Do you mean the sample code is not working or the UI is not responsive？

format_quote

Comment is deleted or blocked.

reply Reply

Re: Configure Hadoop 3.1.0 in a Multi Node Cluster

4 months ago

more_vert

I'm glad it's helping you. :)

format_quote

person Shaik Moulali access_time 4 months ago
Re: Configure Hadoop 3.1.0 in a Multi Node Cluster

Thank you so much you are a great job.

Your tutorial helped me a lot in hadoop multinode cluster administration.

Keep posting latest updates...

reply Reply

Re: ASP.NET Core 2 with Bootstrap 4 Bundler Minifier Issue: Expected semicolon or closing curly-brace found '-'

4 months ago

more_vert

Hello,

This should has been fixed now according to the issues trackers on GitHub. If you are still encountering this problem, please report to the project site on GitHub.

BTW, I've migrated to use Gulp to package my client resources. Refer to the following page for more details:

Migrate from Bower to Gulp for Client Libraries Management in ASP.NET Core

format_quote

person G Swanson access_time 4 months ago
Re: ASP.NET Core 2 with Bootstrap 4 Bundler Minifier Issue: Expected semicolon or closing curly-brace found '-'

I am still getting the problem. What do I need to upgrade to fix it?

I am using Visual Studio 2019 and most of my nuget packages are pretty recent.

reply Reply

Re: Apache Hive 3.0.0 Installation on Windows 10 Step by Step Guide

4 months ago

more_vert

Hello, yes you are right. You may also need to install a metastore database depends on which database you want to use as detailed in the above installation guide.

BTW, if you are using Windows 10, I would recommend using WSL to install.

Refer to this page for more details:

https://kontext.tech/docs/DataAndBusinessIntelligence/p/big-data-tools-on-windows-via-windows-subsystem-for-linux-wsl

You can find my LinkedIn link on the About page of this site.

Cheers,

Raymond

format_quote

person Swati Agarwal access_time 4 months ago
Re: Apache Hive 3.0.0 Installation on Windows 10 Step by Step Guide

Hi Team,

Yes it was installation issue. Thanks for the help.

I am new to Hadoop 3, and would seek your guidance.

For installing and working in Hadoop 3, we have to follow:

1) Hadoop 3 installation process

https://kontext.tech/docs/DataAndBusinessIntelligence/p/install-hadoop-300-in-windows-single-node

2) Hive process

https://kontext.tech/docs/DataAndBusinessIntelligence/p/apache-hive-300-installation-on-windows-10-step-by-step-guide

Please correct me if I am wrong.

Is there anything else that is required to be installed or set up? Please suggest and guide me.

Also can we connect over linkedin? If I get stuck somewhere I would need your expert advice.

My linkedin id is : https://www.linkedin.com/in/swati0303/

It will be really really helpful.

Regards,

Swati

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Re: Sqoop Installation on Windows 10 using Windows Subsystem for Linux

4 months ago

more_vert

@Sekhar You can refer to the user documentation link about sqoop import command. You need to pass in your JDBC url, user name, password, source table, etc.
format_quote

person Sekhar access_time 5 months ago
Re: Sqoop Installation on Windows 10 using Windows Subsystem for Linux

Thanks for the detailed steps for installing Hadoop, Sqoop. I was trying to sqoop data from mysql and getting different kind of errors. I followed your instructions to install on WSL. Would it be possible to provide steps/examples to sqoop data from any derby/mysql. Thank you..

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Re: Apache Hive 3.0.0 Installation on Windows 10 Step by Step Guide

5 months ago

more_vert

Did you get Hadoop installation successfully first?

This is a HDFS CLI issue and is not related to Hive installation.

format_quote

person Swati Agarwal access_time 5 months ago
Re: Apache Hive 3.0.0 Installation on Windows 10 Step by Step Guide

Hi Team,

At step, Set up Hive HDFS folders while creating dir using hadoop fs -mkdir /tmp at cmd, the system is throwing an error.

mkdir: Your endpoint configuration is wrong

Please suggest how to resolve this.

Regards,

Swati

reply Reply

Re: Install Hadoop 3.0.0 in Windows (Single Node)

5 months ago

more_vert

There are many ways to do it:

hadoop fs commands to copy file from local to HDFS
Spark or any other frames that can talk with HDFS...
Sqoop (SQL to Hadoop)

format_quote

person Swati Agarwal access_time 5 months ago
Re: Install Hadoop 3.0.0 in Windows (Single Node)

Hi there,

I have installed the Hadoop 3 as per instructions mentioned above. Please suggest the steps to load data in Hadoop through cmd in windows 10 and also to perform operation on it.

Regards,

Swati

reply Reply

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.NET Machine Learning

ML.NET is an open source and cross-platform machine learning framework. With ML.NET, you can create custom ML models using C# or F# without having to leave the .NET ecosystem. This column publish articles about ML.NET.

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Code snippets

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GCP

Data analytics with Google Cloud Platform.

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Azure

Data analytics with Microsoft Azure cloud platform.

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Posts and tutorials about Power BI.

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Posts about Apache Sqoop, a tool designed for efficiently transferring bulk data between Apache Hadoop and structured datastores such as relational databases.

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General IT information for programming.

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Spark + PySpark

Apache Spark installation guides, performance tuning tips, general tutorials, etc.

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