Welcome!

.NET Authors: ScriptRock Blog, Elizabeth White, Pat Romanski, Rick Delgado, Srinivasan Sundara Rajan

Related Topics: DevOps Journal, Java, SOA & WOA, .NET, AJAX & REA, Cloud Expo

DevOps Journal: Blog Post

DevOps Role in Troubleshooting JVM Issues | @DevOpsSummit [#DevOps]

Application developers can deploy their applications with success in a staging or QA environment

The JVM issues vary from Java OutOfMemory Error to JVM Crash. Application developers might be not completely equipped to determine the root cause of the issue, hence DevOps can play a vital role in narrowing down the issue and connecting the right people/team to rectify the problem.

Application developers can deploy their applications with success in a staging or QA environment and broadcast that the application is working fine. However, the staging or QA environment is not completely identical with production at - least with respect to load. Due to huge load, the application can behave differently. In order to prevent an occurrence of these kinds of scenarios, it is a good practice to engage a DevOps team [with right JVM skills] to proactively analyze the running application. Proactive engagement of a DevOps team will be beneficial for the organization and for the development team as well.

As a proactive engagement, the DevOps team needs to conduct an analysis on the collected memory snapshot.The memory snapshot can be gathered at regular intervals time and multiple samples of the same, so that a good picture of what is happening internally is known.

By employing appropriate JVM diagnostics tools, the DevOps team can provide recommendations to application developers with respect to memory consumption, memory reserved or memory wasted in Java collections.The topmost consumer of Java Heap memory, classes loaded, object promotion rate,object liveness, object references and many more details can be shared with application developers proactively. These in-depth details will provide application developers with insight into the application behavior and help identify any potential issues.

Apart from conducting memory-related analysis, the DevOps team can look into the performance of the application and determine the root cause of the degraded performance (if any). With regard to this, employing the right tool and conducting analysis on Garbage Collection activities will reveal whether the poor performance is due to GC or outside of the GC. The Memory Analyzer tool, which is available as a plugin to Eclipse, can be employed to conduct memory-related analysis and gather enough information. In the same pattern, the plugin " Garbage Collection Memory Visualizer" can be employed to conduct analysis on verbose GC data.

As a case study I would like to share one of the scenarios that we encountered in our organization and how we isolated the issue before engaging the right team to fix it. One of our customers upgraded to the latest application release from a previous release and noticed a significant performance degradation in the throughput. As a first step, we confirmed the customer's claim by reproducing the reported issue in our environment. Having a local reproduction environment provided us with various opportunities to try out various things when narrowing down the issue. After the first level of analysis, we confirmed the area or component that was contributing to the observed behavior and a command-line parameter was recommended to workaround the issue.The provided recommendation was tested in our local reproduction environment with success and this gave us the confidence that the  issue can be overcome with the current recommendation.

On further analysis, we engaged the appropriate tool to determine the percentage of time consumed and captured the snapshots with the latest release and the previous release where the issue was not noticed.This level of analysis revealed the exact area where more time was spent. Once these snapshots were shared with the development team, the development team's task was much easier as the area of code was already narrowed down for fixing.This way, we isolated the issue and helped the customer overcome the problem.

More Stories By ChandraShekar Dattatreya

Chandra Shekara Dattatreya is a DevOps guy working in a Fortune-500 company and has 10+ years' of experience debugging JVM-related issues. In the course of debugging, he has encountered multiple scenarios from various customers and provided solutions to all of them with success. In his current role, he is engaged in identifying and resolving JVM-related issues for an e-commerce company.

@ThingsExpo Stories
The 3rd International Internet of @ThingsExpo, co-located with the 16th International Cloud Expo - to be held June 9-11, 2015, at the Javits Center in New York City, NY - announces that its Call for Papers is now open. The Internet of Things (IoT) is the biggest idea since the creation of the Worldwide Web more than 20 years ago.
Cloud Expo 2014 TV commercials will feature @ThingsExpo, which was launched in June, 2014 at New York City's Javits Center as the largest 'Internet of Things' event in the world. The next @ThingsExpo will take place November 4-6, 2014, at the Santa Clara Convention Center, in Santa Clara, California. Since its launch in 2008, Cloud Expo TV commercials have been aired and CNBC, Fox News Network, and Bloomberg TV. Please enjoy our 2014 commercial.
IoT is still a vague buzzword for many people. In his session at @ThingsExpo, Mike Kavis, Vice President & Principal Cloud Architect at Cloud Technology Partners, discussed the business value of IoT that goes far beyond the general public's perception that IoT is all about wearables and home consumer services. He also discussed how IoT is perceived by investors and how venture capitalist access this space. Other topics discussed were barriers to success, what is new, what is old, and what the future may hold. Mike Kavis is Vice President & Principal Cloud Architect at Cloud Technology Pa...
As the Internet of Things unfolds, mobile and wearable devices are blurring the line between physical and digital, integrating ever more closely with our interests, our routines, our daily lives. Contextual computing and smart, sensor-equipped spaces bring the potential to walk through a world that recognizes us and responds accordingly. We become continuous transmitters and receivers of data. In his session at @ThingsExpo, Andrew Bolwell, Director of Innovation for HP's Printing and Personal Systems Group, discussed how key attributes of mobile technology – touch input, sensors, social, and ...
Dale Kim is the Director of Industry Solutions at MapR. His background includes a variety of technical and management roles at information technology companies. While his experience includes work with relational databases, much of his career pertains to non-relational data in the areas of search, content management, and NoSQL, and includes senior roles in technical marketing, sales engineering, and support engineering. Dale holds an MBA from Santa Clara University, and a BA in Computer Science from the University of California, Berkeley.
Almost everyone sees the potential of Internet of Things but how can businesses truly unlock that potential. The key will be in the ability to discover business insight in the midst of an ocean of Big Data generated from billions of embedded devices via Systems of Discover. Businesses will also need to ensure that they can sustain that insight by leveraging the cloud for global reach, scale and elasticity.
There's Big Data, then there's really Big Data from the Internet of Things. IoT is evolving to include many data possibilities like new types of event, log and network data. The volumes are enormous, generating tens of billions of logs per day, which raise data challenges. Early IoT deployments are relying heavily on both the cloud and managed service providers to navigate these challenges. In her session at Big Data Expo®, Hannah Smalltree, Director at Treasure Data, discussed how IoT, Big Data and deployments are processing massive data volumes from wearables, utilities and other machines...
The Internet of Things (IoT) is making everything it touches smarter – smart devices, smart cars and smart cities. And lucky us, we’re just beginning to reap the benefits as we work toward a networked society. However, this technology-driven innovation is impacting more than just individuals. The IoT has an environmental impact as well, which brings us to the theme of this month’s #IoTuesday Twitter chat. The ability to remove inefficiencies through connected objects is driving change throughout every sector, including waste management. BigBelly Solar, located just outside of Boston, is trans...
Performance is the intersection of power, agility, control, and choice. If you value performance, and more specifically consistent performance, you need to look beyond simple virtualized compute. Many factors need to be considered to create a truly performant environment. In his General Session at 15th Cloud Expo, Harold Hannon, Sr. Software Architect at SoftLayer, discussed how to take advantage of a multitude of compute options and platform features to make cloud the cornerstone of your online presence.
"There is a natural synchronization between the business models, the IoT is there to support ,” explained Brendan O'Brien, Co-founder and Chief Architect of Aria Systems, in this SYS-CON.tv interview at the 15th International Cloud Expo®, held Nov 4–6, 2014, at the Santa Clara Convention Center in Santa Clara, CA.
Advanced Persistent Threats (APTs) are increasing at an unprecedented rate. The threat landscape of today is drastically different than just a few years ago. Attacks are much more organized and sophisticated. They are harder to detect and even harder to anticipate. In the foreseeable future it's going to get a whole lot harder. Everything you know today will change. Keeping up with this changing landscape is already a daunting task. Your organization needs to use the latest tools, methods and expertise to guard against those threats. But will that be enough? In the foreseeable future attacks w...
As enterprises move to all-IP networks and cloud-based applications, communications service providers (CSPs) – facing increased competition from over-the-top providers delivering content via the Internet and independently of CSPs – must be able to offer seamless cloud-based communication and collaboration solutions that can scale for small, midsize, and large enterprises, as well as public sector organizations, in order to keep and grow market share. The latest version of Oracle Communications Unified Communications Suite gives CSPs the capability to do just that. In addition, its integration ...
Exploiting weak identity credentials is one of the most common elements of most attacks. Even attacks that seem unrelated to users, such as recent point of sale (POS) attacks at well-known retailers like the ones you have mentioned, can be traced to insecure passwords. Often, the same password is repeated for all organizations managed by the POS vendor, and once it is stolen, it essentially becomes a default password and the attackers can gain knowledge of the customer base.
The Internet of Things (IoT) promises to evolve the way the world does business; however, understanding how to apply it to your company can be a mystery. Most people struggle with understanding the potential business uses or tend to get caught up in the technology, resulting in solutions that fail to meet even minimum business goals. In his session at @ThingsExpo, Jesse Shiah, CEO / President / Co-Founder of AgilePoint Inc., showed what is needed to leverage the IoT to transform your business. He discussed opportunities and challenges ahead for the IoT from a market and technical point of vie...
Disruptive macro trends in technology are impacting and dramatically changing the "art of the possible" relative to supply chain management practices through the innovative use of IoT, cloud, machine learning and Big Data to enable connected ecosystems of engagement. Enterprise informatics can now move beyond point solutions that merely monitor the past and implement integrated enterprise fabrics that enable end-to-end supply chain visibility to improve customer service delivery and optimize supplier management. Learn about enterprise architecture strategies for designing connected systems tha...
WebRTC defines no default signaling protocol, causing fragmentation between WebRTC silos. SIP and XMPP provide possibilities, but come with considerable complexity and are not designed for use in a web environment. In his session at @ThingsExpo, Matthew Hodgson, technical co-founder of the Matrix.org, discussed how Matrix is a new non-profit Open Source Project that defines both a new HTTP-based standard for VoIP & IM signaling and provides reference implementations.
From telemedicine to smart cars, digital homes and industrial monitoring, the explosive growth of IoT has created exciting new business opportunities for real time calls and messaging. In his session at @ThingsExpo, Ivelin Ivanov, CEO and Co-Founder of Telestax, shared some of the new revenue sources that IoT created for Restcomm – the open source telephony platform from Telestax. Ivelin Ivanov is a technology entrepreneur who founded Mobicents, an Open Source VoIP Platform, to help create, deploy, and manage applications integrating voice, video and data. He is the co-founder of TeleStax, a...
The worldwide cellular network will be the backbone of the future IoT, and the telecom industry is clamoring to get on board as more than just a data pipe. In his session at @ThingsExpo, Evan McGee, CTO of Ring Plus, Inc., discussed what service operators can offer that would benefit IoT entrepreneurs, inventors, and consumers. Evan McGee is the CTO of RingPlus, a leading innovative U.S. MVNO and wireless enabler. His focus is on combining web technologies with traditional telecom to create a new breed of unified communication that is easily accessible to the general consumer. With over a de...
The Internet of Things promises to transform businesses (and lives), but navigating the business and technical path to success can be difficult to understand. In his session at @ThingsExpo, Sean Lorenz, Technical Product Manager for Xively at LogMeIn, demonstrated how to approach creating broadly successful connected customer solutions using real world business transformation studies including New England BioLabs and more.
Recurring revenue models are great for driving new business in every market sector, but they are complex and need to be effectively managed to maximize profits. How you handle the range of options for pricing, co-terming and proration will ultimately determine the fate of your bottom line. In his session at 15th Cloud Expo, Brendan O'Brien, Co-founder at Aria Systems, session examined: How time impacts recurring revenue How to effectively handle customer plan changes The range of pricing and packaging options to consider