We have developed a Grails 2.0 application, which previously ran smoothly on MySQL
We have been asking administrators to switch to their favorite PostgreSQL
We have added some new featu
Author: Simo
HBASE-JAVA-API operation table
package com.itheima;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.*;
import org.apache.hadoop.hbase.client.*;
import org.apache.hadoop.hbase.filter.*;
import o
Why is NHIBERNATE delayed loading binding to session?
Using Castle ActiveRecord, I stumbled upon a problem during lazy loading.
The following works (obviously)
using (new SessionScope())
{
User singleUser = User.FindFirst(…)
User
Hadoop – How do I check if HDFS is running?
I want to see if Hadoop’s hdfs file system is working properly. I know that jps lists the running daemons, but I don’t actually know which daemons to look for. < p>
I ran the following comman
NHibernate session (and stateless conversation) and long-running applications
In the context of Windows Web Services for running jobs, we try to reuse the NHibernate DAL we developed for Web applications.
For session management , We have two options, each of which has
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Fuck. . . . Can’t connect to the datanode. I don’t know why the datanode can’t be connected. .
2019-07-19 16:10:00,156 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: hadoop102
OCP-052 Exam Question Board (21) -Cuug Interior Solution Edition
Which two are true about the Archive (ARCn) processes?
A)They archive redo directly from the redo log buffer.
B)They are used during instance recovery.
C)They automatically delete
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Is there a way to use java bean functionality on unmapped tables?
So, I have a table that is only used for reading and it will never be modified. I need to query it to display the data. But I
hadoop – Apache Hive regexp_extract UDF
I encountered a piece of code in Apache Hive, such as regexp_extract(input,'[0-9] *’,0), can someone explain to me what this code does? Thank you Starting from the Hive manual DDL, it returns the
MapReduce on Hadoop said “output file already exists”
I ran a wordcount example using Mapreduce for the first time, and it worked. Then, I stopped the cluster, started it temporarily, and followed the same steps. This error is displayed:
10P:/$