Troubleshooting “Java.Sql.Sqlrecoverableexception: Closed Connection” In Java Database Connectivity (JDBC)
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Troubleshooting “Java.Sql.Sqlrecoverableexception: Closed Connection” In Java Database Connectivity (JDBC)

ByNolan Granger

Java developers often encounter the “java.sql.SQLRecoverableException: Closed Connection” error when working with databases through Java Database Connectivity (JDBC). This error typically indicates that the application is attempting to perform an operation on a database connection that has already been closed. In this article, we’ll explore the common causes of this issue and provide step-by-step solutions…

Azure Event Hub vs Event Grid | Comparison Guide

Azure Event Hub vs Event Grid | Comparison Guide

ByNolan Granger

The rise of data-driven and event-driven applications has led to the emergence of specialized cloud services for real-time data streaming and event processing. The most popular Azure services in this domain are Azure Event Hubs and Azure Event Grid.  In this article, we will do a deep dive comparison between these two services to understand…

Understanding And Resolving “Sql*Net Message From Client” In Oracle Database

Understanding And Resolving “Sql*Net Message From Client” In Oracle Database

ByNolan Granger

The “SQL*Net message from client” is a common message that Oracle Database administrators may encounter when monitoring their database performance. This message is often associated with network latency issues, and understanding its implications can help diagnose and address performance bottlenecks. What Is “Sql*Net Message From Client”? The “SQL*Net message from client” is an entry in…

Understanding ORA-01555 Caused by SQL Statement

Understanding ORA-01555 Caused by SQL Statement

ByNolan Granger

The Oracle error ORA-01555, commonly known as a snapshot too old error, arises when an SQL statement attempts to access data that another transaction has overwritten. This article delves into the specifics of this error, its causes, and effective solutions to mitigate its occurrence. ORA-01555 Caused by SQL Statement The error ORA-01555 occurs in Oracle…

Understanding And Resolving “Cannot Initialize The Data Source Object Of Ole Db Provider” Error

Understanding And Resolving “Cannot Initialize The Data Source Object Of Ole Db Provider” Error

ByNolan Granger

The issue of “Cannot initialize the data source object of OLE DB provider” often perplexes users dealing with database connectivity and OLE DB provider configurations. This problem, while frustrating, can be resolved by understanding its origins and employing effective troubleshooting steps. In this article, we’ll explore the causes behind this error, strategies to address it,…

Start Postgres Server on Ubuntu: A Step-by-Step Guide

Start Postgres Server on Ubuntu: A Step-by-Step Guide

ByNolan Granger

PostgreSQL is a powerful, open-source object-relational database management system (ORDBMS) that is known for its reliability, feature richness, and performance. It is a popular choice for a wide variety of applications, from small web applications to large enterprise databases. In this content, we will show you how to start the PostgreSQL server on Ubuntu. We…

Incremental Statistics Cannot Be Used With Histogram | Reasons & Alternatives

Incremental Statistics Cannot Be Used With Histogram | Reasons & Alternatives

ByNolan Granger

Incremental statistics and histograms are two important concepts in data analysis and database management. Incremental statistics are a method of updating statistics on a table or partition without having to scan the entire dataset.  This can be a significant time savings, especially for large datasets. Histograms, on the other hand, are a way of representing…

Power Query Add Columns From Another Table | 2 Methods and Issues Discussed

Power Query Add Columns From Another Table | 2 Methods and Issues Discussed

ByNolan Granger

Power Query, a data manipulation tool integrated with Excel, enables users to perform various data transformations, including adding columns from another table. This capability is particularly useful when combining data from multiple sources and enriching existing datasets with additional information. The methodologies and associated issues will be discussed in the following sections. Prerequisites for Adding…

How to Build an Operational Datastore With S3 and Redshift? Step-by-Step Guide

How to Build an Operational Datastore With S3 and Redshift? Step-by-Step Guide

ByNolan Granger

Operational data is produced by day-to-day business activities like transactions, user interactions, IoT sensors, etc. This high-velocity data needs specialized infrastructure for storage and analysis.  Operational data stores built on Amazon S3 and Amazon Redshift provide a powerful and flexible cloud architecture for real-time analytics.  In this step-by-step guide, we will dive into how to…

How to Connect Spark to Remote Hive | Unleashing the Power
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How to Connect Spark to Remote Hive | Unleashing the Power

ByNolan Granger

Apache Spark is a powerful open-source distributed computing system that is widely used for big data processing and analytics. Hive, another Apache project, is a data warehouse infrastructure built on top of Hadoop for providing data summarization, query, and analysis.  Connecting Spark to a remote Hive instance allows users to leverage the capabilities of both…