Landing on the Cloudera manager found that a lot of the newspaper space, hand-cheap will be all deleted/tmp directory, and then restart the server and agent, found that the agent can start normally, but the server does not normally start, view log, found the error
2018-02-23 11:13:05,313 ERRORmain:com.cloudera.enterprise.dbutil.DbUtil:InnoDB engine not found. Showengines reported: [Mrg_myisam, CSV, MYISAM, MEMORY]
2018-02-23 11:13:05,313 ERRORmain:com
Why does Cloudera need to create a Hadoop security component Sentry?1. Big Data Security System
To clarify this issue, we must start from four levels of the big data platform security system: Peripheral Security, data security, access security, and access behavior monitoring, as shown in;
Peripheral Security technology refers to the network security technology mentioned in the traditional sense, such as firewall and login authentication;
In a narrow
Why reboot:Suddenly found Clouderamanager's WebUI can't visit ...I used netstat to look at my WebUI listening port, found that more than close_wait, on-line check is the socket closed there is a problem caused by n multiple hang links.Reasons and how to resolve:Looking for a long, did not find a good way, had to restart the CDM to solve. If you have a better way, please leave a message ha.To restart the script:/opt/cloudera-manager/etc/init.d/
", attr{type}==" 1 ", kernel==" eth* ", name=" eth1 "Record the MAC address of the eth1 Nic 00:0c:29:50:bd:17Next, open the/etc/sysconfig/network-scripts/ifcfg-eth0# Vi/etc/sysconfig/network-scripts/ifcfg-eth0Change device= "eth0" to Device= "eth1",Change the hwaddr= "00:0c:29:8f:89:97" to the MAC address above hwaddr= "00:0c:29:50:bd:17"Finally, restart the network# Service Network RestartOr#/etc/init.d/network RestartIt's normal.This article is from the Linux commune website (www.linuxidc.com
To standardize hadoop configurations, cloudera can help enterprises install, configure, and run hadoop to process and analyze large-scale enterprise data.
For enterprises, cloudera's software configuration does not use the latest hadoop 0.20, but uses hadoop 0.18.3-12. cloudera. ch0_3 is encapsulated and integrated with hive provided by Facebook, pig provided by Yahoo, and other hadoop-based SQL implementa
practical exercises, providing a complete and detailed source code for learners to learn or apply to the project. The course courseware is also very detailed, in the student is not convenient to watch the video when the direct reading courseware and the combination of source code, the same can achieve a good learning effect, and can greatly save study time.The programming language in the course uses the current more promising scala,hadoop using the Cloudera
During the installation of CDH using Cloudera Manager, it was discovered that the installation process card was assigned parcel to a slave machine.Check agent log found the following error:... Mainthread Agent ERROR Failed to handle Heartbeat Response ...The error alarm said "processing heartbeat response failure", see the alarm message first thought is the network problem?The network connection between the machines was checked and no proble
This document describes how to manually install the cloudera hive cdh4.2.0 cluster. For environment setup and hadoop and hbase installation processes, see the previous article.Install hive
Hive is installed on mongotop1. Note that hive saves metadata using the Derby database by default. Replace it with PostgreSQL here. The following describes how to install PostgreSQL, copy the Postgres jdbc jar file to the hive lib directory.Upload files
Uploadhive-0
This article describes Cloudera Manager configuration Hive Metastore1, environmental information2, configuring HA for Namenode
1, environmental informationEnvironment information for deploying cdh5.x articles based on Cloudera MANAGER5 installation.
2, configuring HA for Namenode2.1. Enter the HDFs interface and click "Enable High Availability"
2.2, enter the Nameservice name, set here as: Nameservice1,
1, first download the image to local. https://hub.docker.com/r/gettyimages/spark/~$ Docker Pull Gettyimages/spark2, download from https://github.com/gettyimages/docker-spark/blob/master/docker-compose.yml to support the spark cluster DOCKER-COMPOSE.YML fileStart it$ docker-compose Up$ docker-compose UpCreating spark_master_1Creating spark_worker_1Attaching to Sp
Step 1: Test spark through spark Shell
Step 1:Start the spark cluster. This is very detailed in the third part. After the spark cluster is started, webui is as follows:
Step 2: Start spark shell:
In this case, you can view the shell in the following Web console:
S
How to view the JVM configuration and generational memory usage of a running spark process is a common monitoring tool for online running jobs:1, through the PS command query PIDPs-ef | grep 5661You can position the PID according to the special characters in the command2. Query the JVM parameter settings of the process using the Jinfo commandJinfo 105007Detailed JVM configuration information can be obtained.Attaching to process ID 105007, please wait
error messages back there .Spark start error 1After careful review of the error message found that the original yarn configuration is not enough memory, spark boot requires 1024+384 MB of memory, but my yarn configuration only a few megabytes, not enough to meet the spark boot requirements, so throw an exception, the key error message as shown:WorkaroundLog in t
The following pit Daddy deployment requirements completed within a week, I was drunk.jdk:1.8Cloudera Manager 5.6.0.1HBase Version 1.0.0Hadoop Version 2.6.0, revision=c282dc6c30e7d5d27410cabbb328d60fc24266d9ZookeeperHive,Hue,Impala 2.1.0OozieSpark 1.6.1Sqoop 2ZookeeperScalar 2.10RESTful API---------------------------------------Official documentsHttp://www.cloudera.com/downloads/manager/5-6-0.htmlUnofficial documentsHttp://www.it165.net/database/html/201604/15043.htmlHttp://wenku.baidu.com/link?u
segment I/O operations, rather than an audit trail of a database. Therefore, it is possible to understand the activity only by providing different levels of monitoring to be able to audit activities that enter directly through the lower points in the stack.Hadoop Activity MonitoringThe events that can be monitored include:• Session and user information.HDFs Operations – commands (cat, tail, chmod, chown, expunge, and so on).MapReduce Jobs-Jobs, actions, permissions.• Exceptions, such as authori
Spark Communication Module
1, Spark Cluster Manager can have local, standalone, mesos, yarn and other deployment methods, in order to
Centralized communication mode
1, RPC remote produce call
Spark Communication mechanism:
The advantages and characteristics of Akka are as follows:
1, parallel and distributed: Akka in design with asynchronous communication and dis
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