|By Martin Etmajer||
|October 27, 2014 11:00 PM EDT||
How to Approach Application Failures in Production
In my recent article, "Software Quality Metrics for your Continuous Delivery Pipeline - Part III - Logging," I wrote about the good parts and the not-so-good parts of logging and concluded that logging usually fails to deliver what it is so often mistakenly used for: as a mechanism for analyzing application failures in production. In response to the heated debates on reddit.com/r/devops and reddit.com/r/programing, I want to demonstrate the wealth of out-of-the-box insights you could obtain from a single urgent, albeit unspecific log message if you only are equipped with the magic ingredient; full transaction context:
Examples of insights you could obtain from full transaction context on a single log message
Bear with me until I get to explain what this actually means and how it helps you get almost immediate answers to the most urgent questions when your users are struck by an application failure:
- "How many users are affected and who are they?"
- "Which tiers are affected by which errors and what is the root cause?"
Operator: I'm here because you broke something. (courtesy of ThinkGeek.com)
When All You Have Is a Lousy Log Message
Does this story sound familiar to you? It's a Friday afternoon and you just received the release artifacts from the development team belatedly, which need to be released by Monday morning. After spending the night and another day in operations to get this release out into production timely, you notice the Monday after that everything you have achieved in the end was some lousy log message:
08:55:26 SEVERE com.company.product.login.LoginLogic - LoginException occurred when processing Login transaction
While this scenario hopefully does not reflect a common case for you, it still shows an important aspect in the life of development and operations: working as an operator involves monitoring the production environment and providing assistance in troubleshooting application failures mainly with the help of log messages - things that developers have baked into their code. While certainly not all log messages need to be as poor as this one, getting down to the bottom of a production failure is often a tedious endeavor (see this comment on reddit by RecklessKelly who sometimes needs weeks to get his "Eureka moment") - if at all possible.
Why There Is No Such Thing as a 100% Error-Free Code
Production failures can become a major pain for your business with long-term effects: they will not only make your visitors buy elsewhere, but depending on the level of frustrations, your customers may choose to stay at your competition instead of giving you another chance.
As we all know, we just cannot get rid of application failures in production entirely. Agile methodologies, such as Extreme Programming or Scrum, aim to build quality into our processes; however, there is still no such thing as a 100% error-free application. "We need to write more tests!" you may argue and I would agree: disciplines such as TDD and ATDD should be an integral part of your software development process since they, if applied correctly, help you produce better code and fewer bugs. Still, it is simply impossible to test each and every corner of your application for all possible combinations of input parameters and application state. Essentially, we can run only a limited subset of all possible test scenarios. The common goal of developers and test automation engineers, hence, must be to implement a testing strategy, which allows them to deliver code of sufficient quality. Consequently, there is always a chance that something can go wrong, and, as a serious business, you will want to be prepared for the unpredictable and, additionally, have as much control over it as possible:
Why you cannot get rid of application failures in production: remaining failure probability
Without further ado, let's examine some precious out-of-the-box insights you could obtain if you are equipped with full transaction context and are able to capture all transactions.
Why this is important? Because it enables you to see the contributions of input parameters, processes, infrastructure and users at all times whenever a failure occurred, solve problems faster, and additionally use the presented information such as unexpected input parameters to further improve your testing strategy.
Initial Situation: Aggregated Log Messages
Instead of crawling a bunch of possibly distributed log files to determine the count of particular log messages, we may, first of all, want to have this done automatically for us just as they happen. This gives a good overview on the respective message frequencies and facilitates prioritization:
Aggregated log events: severity, logger name, message and count
What we see here (analysis view based on our PurePath technology) is that there have been 104 occurrences of the same log message in the application. We could also observe other captured event data, such as the severity level and the name of the logger instance (usually the name of the class that created the logger).
Question #1: How many users are affected and who are they?
Failed Business Transactions: "Logins" and "Logins by Username"
Having the full transactional context and not just the log message allows us to figure out which critical Business Transactions of our application are impacted. From the dashboard above we can observe that "Logins" and "Logins by Username" have failed: we see that 61 users attempted the 104 logins and who these users were by their username.
For questions 2 and 3, and for further insight, click here for the full article.
Fact is, enterprises have significant legacy voice infrastructure that’s costly to replace with pure IP solutions. How can we bring this analog infrastructure into our shiny new cloud applications? There are proven methods to bind both legacy voice applications and traditional PSTN audio into cloud-based applications and services at a carrier scale. Some of the most successful implementations leverage WebRTC, WebSockets, SIP and other open source technologies. In his session at @ThingsExpo, Da...
Dec. 3, 2016 09:30 PM EST Reads: 1,595
As data explodes in quantity, importance and from new sources, the need for managing and protecting data residing across physical, virtual, and cloud environments grow with it. Managing data includes protecting it, indexing and classifying it for true, long-term management, compliance and E-Discovery. Commvault can ensure this with a single pane of glass solution – whether in a private cloud, a Service Provider delivered public cloud or a hybrid cloud environment – across the heterogeneous enter...
Dec. 3, 2016 06:15 PM EST Reads: 1,508
"IoT is going to be a huge industry with a lot of value for end users, for industries, for consumers, for manufacturers. How can we use cloud to effectively manage IoT applications," stated Ian Khan, Innovation & Marketing Manager at Solgeniakhela, in this SYS-CON.tv interview at @ThingsExpo, held November 3-5, 2015, at the Santa Clara Convention Center in Santa Clara, CA.
Dec. 3, 2016 05:30 PM EST Reads: 4,040
Today we can collect lots and lots of performance data. We build beautiful dashboards and even have fancy query languages to access and transform the data. Still performance data is a secret language only a couple of people understand. The more business becomes digital the more stakeholders are interested in this data including how it relates to business. Some of these people have never used a monitoring tool before. They have a question on their mind like “How is my application doing” but no id...
Dec. 3, 2016 05:15 PM EST Reads: 2,136
@GonzalezCarmen has been ranked the Number One Influencer and @ThingsExpo has been named the Number One Brand in the “M2M 2016: Top 100 Influencers and Brands” by Onalytica. Onalytica analyzed tweets over the last 6 months mentioning the keywords M2M OR “Machine to Machine.” They then identified the top 100 most influential brands and individuals leading the discussion on Twitter.
Dec. 3, 2016 05:15 PM EST Reads: 1,998
Information technology is an industry that has always experienced change, and the dramatic change sweeping across the industry today could not be truthfully described as the first time we've seen such widespread change impacting customer investments. However, the rate of the change, and the potential outcomes from today's digital transformation has the distinct potential to separate the industry into two camps: Organizations that see the change coming, embrace it, and successful leverage it; and...
Dec. 3, 2016 03:15 PM EST Reads: 3,222
The Internet of Things (IoT) promises to simplify and streamline our lives by automating routine tasks that distract us from our goals. This promise is based on the ubiquitous deployment of smart, connected devices that link everything from industrial control systems to automobiles to refrigerators. Unfortunately, comparatively few of the devices currently deployed have been developed with an eye toward security, and as the DDoS attacks of late October 2016 have demonstrated, this oversight can ...
Dec. 3, 2016 02:45 PM EST Reads: 700
Extracting business value from Internet of Things (IoT) data doesn’t happen overnight. There are several requirements that must be satisfied, including IoT device enablement, data analysis, real-time detection of complex events and automated orchestration of actions. Unfortunately, too many companies fall short in achieving their business goals by implementing incomplete solutions or not focusing on tangible use cases. In his general session at @ThingsExpo, Dave McCarthy, Director of Products...
Dec. 3, 2016 02:45 PM EST Reads: 522
Machine Learning helps make complex systems more efficient. By applying advanced Machine Learning techniques such as Cognitive Fingerprinting, wind project operators can utilize these tools to learn from collected data, detect regular patterns, and optimize their own operations. In his session at 18th Cloud Expo, Stuart Gillen, Director of Business Development at SparkCognition, discussed how research has demonstrated the value of Machine Learning in delivering next generation analytics to impr...
Dec. 3, 2016 02:15 PM EST Reads: 6,955
More and more brands have jumped on the IoT bandwagon. We have an excess of wearables – activity trackers, smartwatches, smart glasses and sneakers, and more that track seemingly endless datapoints. However, most consumers have no idea what “IoT” means. Creating more wearables that track data shouldn't be the aim of brands; delivering meaningful, tangible relevance to their users should be. We're in a period in which the IoT pendulum is still swinging. Initially, it swung toward "smart for smar...
Dec. 3, 2016 02:00 PM EST Reads: 475
20th Cloud Expo, taking place June 6-8, 2017, at the Javits Center in New York City, NY, will feature technical sessions from a rock star conference faculty and the leading industry players in the world. Cloud computing is now being embraced by a majority of enterprises of all sizes. Yesterday's debate about public vs. private has transformed into the reality of hybrid cloud: a recent survey shows that 74% of enterprises have a hybrid cloud strategy.
Dec. 3, 2016 01:30 PM EST Reads: 2,130
Businesses and business units of all sizes can benefit from cloud computing, but many don't want the cost, performance and security concerns of public cloud nor the complexity of building their own private clouds. Today, some cloud vendors are using artificial intelligence (AI) to simplify cloud deployment and management. In his session at 20th Cloud Expo, Ajay Gulati, Co-founder and CEO of ZeroStack, will discuss how AI can simplify cloud operations. He will cover the following topics: why clou...
Dec. 3, 2016 01:15 PM EST Reads: 629
Internet of @ThingsExpo, taking place June 6-8, 2017 at the Javits Center in New York City, New York, is co-located with the 20th International Cloud Expo and will feature technical sessions from a rock star conference faculty and the leading industry players in the world. @ThingsExpo New York Call for Papers is now open.
Dec. 3, 2016 01:00 PM EST Reads: 1,875
"ReadyTalk is an audio and web video conferencing provider. We've really come to embrace WebRTC as the platform for our future of technology," explained Dan Cunningham, CTO of ReadyTalk, in this SYS-CON.tv interview at WebRTC Summit at 19th Cloud Expo, held November 1-3, 2016, at the Santa Clara Convention Center in Santa Clara, CA.
Dec. 3, 2016 01:00 PM EST Reads: 328
Successful digital transformation requires new organizational competencies and capabilities. Research tells us that the biggest impediment to successful transformation is human; consequently, the biggest enabler is a properly skilled and empowered workforce. In the digital age, new individual and collective competencies are required. In his session at 19th Cloud Expo, Bob Newhouse, CEO and founder of Agilitiv, drew together recent research and lessons learned from emerging and established compa...
Dec. 3, 2016 12:45 PM EST Reads: 738
Data is the fuel that drives the machine learning algorithmic engines and ultimately provides the business value. In his session at Cloud Expo, Ed Featherston, a director and senior enterprise architect at Collaborative Consulting, discussed the key considerations around quality, volume, timeliness, and pedigree that must be dealt with in order to properly fuel that engine.
Dec. 3, 2016 12:45 PM EST Reads: 1,955
Everyone knows that truly innovative companies learn as they go along, pushing boundaries in response to market changes and demands. What's more of a mystery is how to balance innovation on a fresh platform built from scratch with the legacy tech stack, product suite and customers that continue to serve as the business' foundation. In his General Session at 19th Cloud Expo, Michael Chambliss, Head of Engineering at ReadyTalk, discussed why and how ReadyTalk diverted from healthy revenue and mor...
Dec. 3, 2016 12:15 PM EST Reads: 1,511
We are always online. We access our data, our finances, work, and various services on the Internet. But we live in a congested world of information in which the roads were built two decades ago. The quest for better, faster Internet routing has been around for a decade, but nobody solved this problem. We’ve seen band-aid approaches like CDNs that attack a niche's slice of static content part of the Internet, but that’s it. It does not address the dynamic services-based Internet of today. It does...
Dec. 3, 2016 11:30 AM EST Reads: 855
The 20th International Cloud Expo has announced that its Call for Papers is open. Cloud Expo, to be held June 6-8, 2017, at the Javits Center in New York City, brings together Cloud Computing, Big Data, Internet of Things, DevOps, Containers, Microservices and WebRTC to one location. With cloud computing driving a higher percentage of enterprise IT budgets every year, it becomes increasingly important to plant your flag in this fast-expanding business opportunity. Submit your speaking proposal ...
Dec. 3, 2016 11:30 AM EST Reads: 2,096
You have great SaaS business app ideas. You want to turn your idea quickly into a functional and engaging proof of concept. You need to be able to modify it to meet customers' needs, and you need to deliver a complete and secure SaaS application. How could you achieve all the above and yet avoid unforeseen IT requirements that add unnecessary cost and complexity? You also want your app to be responsive in any device at any time. In his session at 19th Cloud Expo, Mark Allen, General Manager of...
Dec. 3, 2016 11:15 AM EST Reads: 1,643