PSQLException when connecting to Postgres server via JDBC in same LAN (PGAdmin works)

I have some severe problems with connecting from DBVisualizer (8.0.9) to a PostgreSQL server which is running in the same LAN. DBVis is Java-based thus uses JDBC for connection. Connecting from...

npm ERR cb() never called

I have a Node.js app hosted on Heroku. Every time I do a git push heroku I get the following error: Counting objects: 14, done. Delta compression using up to 6 threads. Compressing objects: 100%...

A generic error occurred in GDI+ at System.Drawing.Image.Save

*Exception:* **A generic error occurred in GDI+. at System.Drawing.Image.Save(String filename, ImageCodecInfo encoder, EncoderParameters encoderParams) at System.Drawing.Image.Save(String...

log4cxx: Segmentation fault in apr_pool_create_ex

I need to use log4cxx for a C++ project. However I fail to understand the basic setup of this library. Here is my minimal attempt: $ cat logger.cpp #include <log4cxx/logger.h> #include...

Mock an Autowired ExecutorService

Abstract: I have a Spring @Component that uses an autowired ExecutorService as a work pool. I'm using JUnit and Mockito to test the functionality of the component and I need to mock that Executor...

Unable to start Docker Service in Ubuntu 16.04

I've been trying to use Docker (1.10) on Ubuntu 16.04 but installation fails because Docker Service doesn't start. I've already tried to install docker by docker.io, docker-engine apt packages and...

mySQL server in XAMP don't start

I read all of articles about my problem but it still not working How can I solve this issue? Here is my log file: 2015-11-10 15:26:56 10fc InnoDB: Warning: Using innodb_additional_mem_pool_size is...

Fake-scrolling containers with very many controls

I'm trying to optimize populating and scrolling a FlowLayoutPanel, but I've had issues with similar controls before, where if they have too many controls inside, it takes a really long while for...

MySQL Server shuts down frequently and won't start again now

OS: Ubuntu 16.04.1 LTS xenial I installed MySQL on my server on AWS and it was working fine, but after we started getting much traffic on-site, it started failing frequently. To fix it, I usually...

C Linked List - Create Nodes within Memory Block

I am attempting to create a linked list within a pre-allocated block of memory. Put simply, I have an initial memory pool declared like so. void *block = malloc(1000); I created the head of a...

Ubuntu AWS instance reachability check failed

I've recently added more storage to the /dev/sda (it was 8GB..made it to 150GB) by stopping the instance, detaching the volume and adding storage and reattaching and then starting the instance. I...

MariaDB ibdata1 file cannot be written

I am using MariaDB for windows. It is stange, all worked before I changed the root-password with the commands USER 'root'@'localhost' IDENTIFIED BY 'password'; and SET PASSWORD FOR...

Unable to access ec2 ebs backed instance

For some unknown reason, an instance that was accessible via ssh on port 22 is no longer allowing access. After checking security groups and NACLs, correct routing tables associated with Gateways...

Pooled Connection Factory for ActiveMQ Artemis

Is there an equivalent to the ActiveMQ 5 PooledConnectionFactory for Artemis? Why is it available in one and not the other? Spring, for example, offers a generic CachingConnectionFactory. This is...

MySQL keeps crashing when using xampp

I have recently started with web-development. I need a good server to run PHP and mySQL applications. The problem I am facing now is that mySQL keeps crashing whenever I open xampp. I have read...

Cassandra node is getting stuck after nodetool decommission

I wish to decommission the Cassandra nodes as nodes need a version upgrade from 3.9 to 3.11. I log in to a particular node and execute the nodetool decommission command. Most of the nodes are...

Graceful shutdown with Generic Host in .NET Core 2.1

.NET Core 2.1 introduced new Generic Host, which allows to host non-HTTP workloads with all benefits of Web Host. Currently, there is no much information and recipes with it, but I used following...

Swift 4 parsing json numeric keys with 1+n amount

I still learning this Codable/Decodable new in Swift 4 for JSON parsing. I am able to build a struct and grab the temperature keys but the Pump and other items like it are numeric strings that...

What is the proper way to make an api call via springs `WebClient`, but ignore the result?

What is the proper way to make an api call via springs WebClient, but ignore the result? The ClientResponse object specifically calls out that I have to do something with the...

Mmap DMA memory uncached: "map pfn ram range req uncached-minus got write-back"

I am mapping DMA coherent memory from kernel to user space. At user level I use mmap() and in kernel driver I use dma_alloc_coherent() and afterwards remap_pfn_range() to remap the pages. This...

How to create Generics Pooling System for components/scripts?

My awareness of Generics is that they can help me streamline my pooling, but can't figure out how. My pooling system is minimalistic, but messy. And now getting unwieldy and messy, and MESSY. It...

How to stop running Container, if error response from daemon is: Cannot Kill Container [...] permission denied?

Tough task: Everytime I try to stop or kill a running container, I get permission denied as an error response from Daemon. I just started learning how to use docker by using a Ubuntu18.04 VM. I...

Default node selector

Use case Let's say I've got 3 different node pools: default, kafka and team-a. I want to make sure that only kafka relevant deployments and stuff like daemonsets or kubernetes system services run...

Wildfly throws UnsupportedOperationException (Naming context is read-only) on start

We're setting up a new staging server (running Ubuntu), and are encountering errors when starting WildFly. The main one seens to be java.lang.UnsupportedOperationException: WFLYNAM0043: Naming...

Alembic : auto generate migration doesn't work

I have an error when I want to do an auto generate migration with alembic. Project tree : - alembic.ini - axis.py - tree.txt - alembic - env.py - README - ...

Pod Launching failed: Pod took too long to start, Failed to run KubernetesPodOperator secret

I'm running the quickstart for KubernetesPodOperator secret using the link below : https://cloud.google.com/composer/docs/how-to/using/using-kubernetes-pod-operator Code used below : from airflow...

RabbitMQ Producer C# .NET Core 5.0 Memory Leak

I was wondering if someone can please help with the following situation: I cannot solve a memory leak with a RabbitMQ Publisher written in C# and using .Net core 5.0. This is the csproj file...

Can't provision jenkins slave pods due to "Unknown client name" error

I'm running Jenkins on Kubernetes with a dynamic slave pod provisioning setup. It used to work well for a long time but somehow started to giving this issue from yesterday. This is the log that...

How do I run XEN on arm64 and Qemu 6.0.0 with Linux 4.20.11 as Dom0

thank you for reading and appreciated for reply! I followed this doc and successfully ran xen 4.12.0 on qemu 3.1.0 with Linux 4.20.11 as Dom0. Then I tried to use higher version of qemu(qemu 5.1.0...

C++ How to cache a variable of template type T in a class?

Suppose that I have a Foo class like this, and I need many instances of it. class Foo { public: Pool* bars; // a global list of bars, each may have a different type template<typename...