Blogs

Python - Confluent_Kafka - Consume from set of partitions, instead of subscribing to the topic.

Git - Rename pushed branches

Mixing Elastic 'bool' and 'range' queries

My notes on systems design interviews

Comment on exported method should be of the form

Exported type should have comment or be unexported

heroku[router]: at=error code=H10 desc="App crashed"

com.sksamuel.elastic4s.TcpClient$ - No cluster.name was specified in the settings for the client.

Angular - apollo-client/core/types.d.ts (17,45): ',' expected

Angular - UNMET PEER DEPENDENCY apollo-client@1.9.0-0

XSL - Transformer configuration exception error checking type expression funcall replace

Terraform, AWS - aws Instance Profile already exists error

cannot locate the core snap: No such file or directory

Scala - cannot resolve symbol "toList"

Play Framework - @helper custom @input text field

Mongo - Custom pessimistic locking mechanism

Logstash - logstash.runner, An unexpected error occurred! does not exist, and I failed trying to create it

spring @async causing BeanCurrentlyInCreationException

Linux - Grep, escape back slash characters

Hibernate - Exception "node to traverse cannot be null"

Java - Transform string list into list

Jongo Mongo - Unwind with match example

Java - Measuring process times

Mongo - Sum values inside documents

Spring, Hibernate - org.springframework.retry.RetryException: Non-skippable exception in recoverer while processing; nested exception is org.hibernate.NonUniqueObjectException: A different object with the same identifier value was already associated with the session

Mongo - Update element inside array

Spring data Mongo - Search inside array

Java 8 - Avoid null pointer exception on object calls

Java 8 - Avoid null pointer exception while calling a null list, set or array of objects

Spring data mongodb - remove element from array

Spring - Asynchronous longpooling rest controller via "callable"

Mongo - exception aggregation result exceeds maximum document size 16MB

Java - Reflection dynamic toString() method

Mongo - Update nested array element

Mongo - errno:111 Connection refused

Hibernate - javax.persistence.PersistenceException: org.hibernate.PropertyAccessException: could not get a field value by reflection getter

Spring batc, H2 - DataAccessResourceFailureException Could not obtain last_insert_id() Invalid parameter count for "LAST_INSERT_ID", expected count: "0"; SQL statement

Java - JSTL, números aleatorios entre valores

Java - getResourceAsStream returning null

Java, Mongo - Start mongo connecting to replica set

Mongo - Start mongo connecting to replica set

Mongo - error "not master and slaveOk=false"

Java, Mongo - BasicBSONList can only work with numeric keys not:

Play, EBean - SQLException Column Index out range 0 < 1

Java, Mongo - Update array element

Mongo - Select max field (aggregate, $project, $macth)

Play Framework - Get current controller path programmatically

Java MongoDB - Commands

My mongoDB commands

Avro - Defining nested types

Play - Synchronous server calls with Jersey

Spring - Asynchronous rest call to a server

Eclipse - Missing Maven Dependencies

Java - javax naming NameNotFoundException DefaultDS not found

Play - No Persistence provider for EntityManager named defaultPersistenceUnit

Play - Junit runtimeException no started application

MySQL: Error 1071 Specified key was too long max key length is 1000 bytes

EGit Eclipse refresh branch list

Hibernate - Update with Inner Join

Groovy, Soap UI - Mock service parameter testing script example

Play - play.libs.ws.WSClient [error] cannot find symbol

Play - IllegalStateException: path.home is not configured

Play - The import views.html.index cannot be resolved

Hibernate - Avoid delete of all entity structure (cascade delete up)

Hibernate - Criteria Inner Join

Spring, Java - @ResponseBody(JSON) request returning Internal Server Error 500

Play - Caused by: java.lang.RuntimeException: There is no started application

PersistenceException: ERROR executing DML bindLog[] error[Column 'XXX' specified twice]

Play - com.mysql.jdbc.Driver driver not found

Wordpress, Hostmonster - 403 permission denied wp-admin install.php

Heroku - Java HTTP 500 connection refused

Java, Spring, Javascript: errorThrown SyntaxError: JSON.parse: unexpected character at line 1 column 1 of the JSON data

JAVA - Problem accessing the absolute URL; java.net.ConnectException: Connection refused

Spring - Bean property 'propertyXXX' is not writable or has an invalid setter method. Does the parameter type of the setter match the return type of the getter?

Codility PermCheck test 100% score

JAVA - Codility FrogRiverOne test 100% score

Codility "Equilibrium"

APEX - Error saving column settings with ORA-01403: no data found Error

Hostmonster - 403 Permission denied (htaccess)

APEX - Dynamic actions "in list" condition not working

JAVA - Introduce Line break in request

ORACLE - SQL estructura jerarquica padre hijo

Java - JSTL, random number between values

Java - SpringMVC NetworkError 406 Not Acceptable while using JSON

Java - Project properties Cannot nest inside library

APEX - Set item value from different page via Javascript

APEX - Javascript submit page with confirmation box

APEX - Not passing session values

APEX - javascript apex submit pasando parametros variables

ORACLE - SQL inserir cambio de linea en campo texto (varchar2, bloc, clob, etc.)

Apex - Submit current page via Javascript

Maven - springframework.web.context.ContextLoaderListener org.lang.ClassNotFoundException

Maven - Update Index Repository

HTTP Status 500 absolute cannot resolved web.xml jar deployed application

ORACLE - ORA-12008: error in materialized view refresh path ORA-01476: divisor is equal to zero

Tomcat - Como iniciar y cerrar Apache Tomcat en un sistema MacOS

Oracle - SQL - Retornar registros entre incio del ano passado y el proximo

ORACLE - PL/SQLsubstituir texto (String Replace)

java rmi server ExportException internal error ObjID already use

Java - RMI - Caused by: java.lang.IllegalArgumentException: illegal remote method encountered

Oracle - Ler/Insert ficheros XML

Oracle - ORA-00955 name is already used by an existing object 00955

Spring - Repeated column in mapping for collection:

ORACLE - Cambiar próxima fecha de ejecución de un job

APEX - Item ID (XXX) is not an item defined on the current page

APEX - Item ID (XXX) is not an item defined on the current page

Oracle - Importar datos desde otra dase datos (impdb)

Oracle - Importing data from another database (impdb)

Oracle - Concatenate several columns in one cell separeted by newline

ORACLE - Concatenar varias lineas en una celda

Oracle - Converter varchar2 para Clob

Oracle - Convert varchar2 to Clob datatype

Jackson - BeanSerializer.serialize and ContainerSerializers$CollectionSerializer.serialize error

Oracle - Conceder permisos de acceso a una table

Hibernate - HibernateException: createQuery is not valid without active transaction

Hibernate - HibernateException: createQuery is not valid without active transaction

Oracle - duplicate fields in RECORD,TABLE or argument list are not permitted

Oracle - duplicate fields in RECORD,TABLE or argument list are not permitted

Oracle - ORA-29282: invalid file ID, ORA-06512: at "SYS.UTL_FILE"

Oracle - Send mail with UTL_SMTP

Spring - BeanCreationException or CGLIB2 when using @Transactional(readOnly = true)

APEX - Interactive report submission, set up UDP_MAIL ACLs

Oracle - Function/Procedure call with output to console

Oracle - String empezando por (Starts With)

Oracle - Field Starts With

Oracle - Generate a Random number in Oracle between a interval

Oracle - Renaming Table Columns in a Oracle External Table

Oracle - Change next Job execution date

Oracle - UTL_FILE.fopen ORA-29280 invalid directory path

Oracle - UTL_FILE.fopen ORA-29280 invalid directory path

MS Access obtener fecha de hoy

MS Access get today date

How to get the Computer Host Name

Ubuntu - Reduce the heat generated by yout laptop/netbook

Ubuntu - Save laptop/netbook battery life

Improve blogger visual appearance

Ubuntu - Install KDE, the alternative to Gnome

mySql - Get N Top rows

mySql - Recuperar el ultimo ID insertado

mySql - Get Last Inserted ID

JSP - Como importar clases

How to import classes in JSPs

SCJP - Books, Mocks and Links

Setting JDBC to use mySQL

MySQL Error Nr. 2002 Can't connect

Ebay Finding Api - Deploy WSDL

Ubuntu - All permissions in Nautilus

Ubuntu - Missing NetWork Manager icon

Oracle - Caracteres de Escape

FTP Bajar más que un fichero a la vez

FTP Download more than one file at time

Oracle - Creaccion de indices

Oracle - Index creation

Oracle - Alter Table, adicionar clave primaria

Oracle - Alter Table, add primary key constraint

Oracle - Alter Table, cambiar nombre de una columna

Oracle - Alter Table, cambiar nombre de una columna

Oracle - Alter Table, change column name

Ubuntu - No application bars

Apache & Tomcat 404, 503 custom error page

Forcing Visits to use SSL

Data Modeling considerations

Fix 404 - page not found routing errors in netlify Angular apps

Reflected XSS All clients - security issue

Spark optimization technics

Subscribe Firehose to SNS with Terraform