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Questions tagged [failover]

The automatic switching to a redundant or standby computer server, system, hardware component or network upon the failure or abnormal termination of the previously active application, server, system, hardware component, or network.

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Kafka consumer fails to consume if first broker is down

I'm using latest version of kafka(kafka_2.12-1.0.0.tgz). I have setup simple cluster with 3 brokers(just changed broker.id=1 and listeners=PLAINTEXT://:9092 in properties file for each instance).After cluster is up I created topic with the following…
murat karakas
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SQL Server failover cluster - determine active node

Is there a way to programmatically determine which node in a SQL Server failover cluster is the active node? Or at least determine whether the current machine is the active node? I have a Windows program which runs on both physical nodes in a…
Kalle
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Celery RabbitMQ broker failover connect issue

I have 3 RabbitMQ nodes in cluster in HA mode. Each node is on separate Docker container. I am using Celery version 4 and kombu version 4. I have used this command to set HA policy: rabbitmqctl set_policy ha-all ""…
draskomikic
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What does the Azure Web Apps architecture look like?

I've had a few outages of 10 to 15 minutes, because apparently Microsoft had a 'blip' on their storages. They told me that it is because of a shared file system between the instances (making it a single point of failure?) I didn't understand it and…
Dirk Boer
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AWS alternative to DNS failover?

I recently started reading about and playing around with AWS. I have particular interest in the different high availability architectures that can be acheived using the platform. Specifically, I am looking for a reliable poor man's solution that can…
Andrei G
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Why is MSDTC not supported when using SQL Server Mirroring & Automatic Failover?

I have an application that I would like to have support SQL Server Mirroring. However, the architecture is currently such that multiple WCF services and DB connections will be enlisted in a single MSDTC transactions, and Microsoft states that MSDTC…
Bryan Batchelder
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Node script - Failover from one server to another server

I have a nodejs script - lets call it "process1" on server1, and same script is running on server2 - "process2" (just with flag=false). Process1 will be preforming actions and will be in "running" state at the beginning. process2 will be running but…
cool
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Mirroring vs. Log Shipping in Sql Server 2005

I'm interested in hearing people's thoughts about the pros and cons of database mirroring vs. log shipping in this scenario: we need to setup a database backup situation wherein there is exactly one secondary server that need not automatically pick…
Karim
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How to start distributed Erlang app without starting dependencies at every node?

I tried to run a simple app in a distributed manner to test failover-takeover features but failed. What I want to: The application is myapp_api with a rest api, it has myapp application as a dependency. I want to start myapp_api on 3 nodes, I want…
user2461860
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How to enable "persistent mode" in Windows failover cluster manager 2012?

In Windows Server 2008 R2 there was a checkbox named "Enable persistent mode" on a General tab in the Properties of a cluster resource. In Windows Server 2012 that seems to have disappeared. My cluster resource is a "generic script" resource (not…
jonas789
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Adding a generic service to cluster from powershell

I'm a newbie in clustering and I'm trying to create a generic service to a cluster using PowerShell. I can add it without any issues using the GUI, but for some reason I cannot add it from PowerShell. Following the first example from the…
Gabi
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Configure GlassFish JDBC connection pool to handle Amazon RDS Multi-AZ failover

I have a Java EE application running in GlassFish on EC2, with a MySQL database on Amazon RDS. I am trying to configure the JDBC connection pool to in order to minimize downtime in case of database failover. My current configuration isn't working…
Andrea
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RabbitMQ and Node.js how to handle failover scenario?

I am using RabbitMQ (cluster) and connecting to it using a Node.js client (node-amqp - https://github.com/postwait/node-amqp). The RabbitMQ docs states that handling a failover scenario (cluster's node failure) should be handled by the client…
Momico
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Apache spark job failed immediately without retry, setting maxFailures doesn't work

I was testing a web crawling/scrapping program on Apache Spark locally on my computer. the program use a few RDD transformations that takes a volatile function that sporadically fails. (The function's purpose is to transform URL links into web…
tribbloid
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How do I cluster an upload folder with ASP.Net?

We have a situation where users are allowed to upload content, and then separately make some changes, then submit a form based on those changes. This works fine in a single-server, non-failover environment, however we would like some sort of…
jsight
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