Welcome!

Release Management Authors: Jnan Dash, Liz McMillan, Lori MacVittie, Gilad Parann-Nissany, Carmen Gonzalez

Blog Feed Post

Log-alize Java: Monitoring Java Application Logs

It has been talked about many, many times, so now it is naturally widely-known that any application, especially one that’s in production, must be monitored. When monitoring, it is important not only to evaluate the current status of the application, but, even more importantly, to predict future potential error situations. It is already standard practice that application programs write log files. These usually contain various information from many different points in the application. Therefore it is very important to process the log files in a way that provides an understanding of what’s going on when things go awry. Unfortunately, as might be expected, the files are usually far from ideally-designed and often contain too many details and too much noise.  As a result, it is actually very difficult to glean much useful information from them. Faced with such a situation, you may often prefer just to select pieces of important information from your logs and see these in real time. In this article, the simple but effective solution for selective monitoring of your Java application logs, in real time, is presented.
You may ask – why Java? The answer is simple – because Java has a powerful log engine, called Log4J. Besides that, the Log4J engine has been ported to other popular programming languages (log4php, log4net, log4cxx, log4js, etc.), so perhaps this same approach can be used with those as well.
Log4j provides many extensions and one of these provides for creating custom appenders. Log4J also has a filtering facility that can be used in custom appenders. Thus, the idea is to create a custom appender with filtering which will selectively get information from your log file and send that information to Monitis. There, it can be shown in tabular and graphical form in order to notify the user if something is starting to go wrong.

We have created the generic custom appender with filtering which receives information from Log4J, filters it according to a user pattern (RegExp) and then sends it to Monitis using the Monitis Open API. The custom appender is wrapped in a Jar file and therefore you shouldn’t make any changes in your application. You can use it as is, without any problem.
All that needs to be done is the following:

  • include the log_mon.jar (generic custom appender) in your list of application libraries
  • Using the settings shown below as an example, modify your Log4J configuration file to specify the settings for the Monitis Appender


<appender name="monitisAppender">

       <param name="monitisApiKey" value="2PE0HVI4DHP34JACKCAE37IOD4" />

 

       <param name="monitisSecretKey" value="7OI90FU3C3DA8ENLNJ0JGGOGO0" />

 

       <param name="monitisMonitorName" value="Log_files_monitor" />

 

       <param name="monitisMonitorTag" value="Custom_logger_monitor" />

 

       <param name="monitisSendInterval" value="60000" />

 

       <layout>

 

           <param name="ConversionPattern" value="%d{ISO8601} %-5p [%t]: %m%n" />

 

       </layout>

 

       <filter>

 

           <param name="filterPattern" value="(Error|Fatal|Warn*|Attention)" />

 

           <param name="minAllowedLevel" value="WARN" />

 

       </filter>

 

</appender>

where:

  • monitisApiKey is user personal API key that can be obtained from Monitis user account
  • monitisSecretKey is user personal secret key that can be obtained from Monitis user account
  • monitisMonitorName is user monitor name (any unique name can be chosen)
  • monitisMonitorTag is tag value for user monitors
  • monitisSendInterval is time interval [ms] between sending monitored info to Monitis
  • ConversationPattern is the pattern that will be used by MonitisAppender to format records
  • filterPattern is a pattern-string for selection of log records that you want to monitor

This should be composed as a Java RegEx and correspond to Java Pattern.matches requirements.

(default is no pattern – so all records will be sent to Log Monitor)


  • minAllowedLevel is the log4j records level (ERROR, WARN, DEBUG, etc.) that you want to monitor (default value is WARN)


Notes:

  • the Log4J configuration should be prepared in XML format because Log4J filter supports XML only
  • this approach doesn’t affect your application  performance because Log4J appenders work in separate threads asynchronously
  • it can take more memory to run your application because an additional custom appender works in the same JVM bounds
  • in comparison to other approaches this approach seems much simpler and doesn’t require additional tools. It’s very close to The Cure for Monitoring Java Logs technique, and simplifies it


The sources and more details can be found in the GitHub.

Share Now:del.icio.usDiggFacebookLinkedInBlinkListDZoneGoogle BookmarksRedditStumbleUponTwitterRSS

Read the original blog entry...

More Stories By Hovhannes Avoyan

Hovhannes Avoyan is the CEO of PicsArt, Inc.,

@ThingsExpo Stories
SYS-CON Events announced today that BMC Software has been named "Siver Sponsor" of SYS-CON's 18th Cloud Expo, which will take place on June 7-9, 2015 at the Javits Center in New York, New York. BMC is a global leader in innovative software solutions that help businesses transform into digital enterprises for the ultimate competitive advantage. BMC Digital Enterprise Management is a set of innovative IT solutions designed to make digital business fast, seamless, and optimized from mainframe to mo...
In his keynote at 18th Cloud Expo, Andrew Keys, Co-Founder of ConsenSys Enterprise, will provide an overview of the evolution of the Internet and the Database and the future of their combination – the Blockchain. Andrew Keys is Co-Founder of ConsenSys Enterprise. He comes to ConsenSys Enterprise with capital markets, technology and entrepreneurial experience. Previously, he worked for UBS investment bank in equities analysis. Later, he was responsible for the creation and distribution of life ...
As cloud and storage projections continue to rise, the number of organizations moving to the cloud is escalating and it is clear cloud storage is here to stay. However, is it secure? Data is the lifeblood for government entities, countries, cloud service providers and enterprises alike and losing or exposing that data can have disastrous results. There are new concepts for data storage on the horizon that will deliver secure solutions for storing and moving sensitive data around the world. ...
Customer experience has become a competitive differentiator for companies, and it’s imperative that brands seamlessly connect the customer journey across all platforms. With the continued explosion of IoT, join us for a look at how to build a winning digital foundation in the connected era – today and in the future. In his session at @ThingsExpo, Chris Nguyen, Group Product Marketing Manager at Adobe, will discuss how to successfully leverage mobile, rapidly deploy content, capture real-time d...
SYS-CON Events announced today that ContentMX, the marketing technology and services company with a singular mission to increase engagement and drive more conversations for enterprise, channel and SMB technology marketers, has been named “Sponsor & Exhibitor Lounge Sponsor” of SYS-CON's 18th Cloud Expo, which will take place on June 7-9, 2016, at the Javits Center in New York City, New York. “CloudExpo is a great opportunity to start a conversation with new prospects, but what happens after the...
With major technology companies and startups seriously embracing IoT strategies, now is the perfect time to attend @ThingsExpo 2016 in New York and Silicon Valley. Learn what is going on, contribute to the discussions, and ensure that your enterprise is as "IoT-Ready" as it can be! Internet of @ThingsExpo, taking place Nov 3-5, 2015, at the Santa Clara Convention Center in Santa Clara, CA, is co-located with 17th Cloud Expo and will feature technical sessions from a rock star conference faculty ...
SYS-CON Events announced today the How to Create Angular 2 Clients for the Cloud Workshop, being held June 7, 2016, in conjunction with 18th Cloud Expo | @ThingsExpo, at the Javits Center in New York, NY. Angular 2 is a complete re-write of the popular framework AngularJS. Programming in Angular 2 is greatly simplified. Now it’s a component-based well-performing framework. The immersive one-day workshop led by Yakov Fain, a Java Champion and a co-founder of the IT consultancy Farata Systems and...
IoT generates lots of temporal data. But how do you unlock its value? How do you coordinate the diverse moving parts that must come together when developing your IoT product? What are the key challenges addressed by Data as a Service? How does cloud computing underlie and connect the notions of Digital and DevOps What is the impact of the API economy? What is the business imperative for Cognitive Computing? Get all these questions and hundreds more like them answered at the 18th Cloud Expo...
Join us at Cloud Expo | @ThingsExpo 2016 – June 7-9 at the Javits Center in New York City and November 1-3 at the Santa Clara Convention Center in Santa Clara, CA – and deliver your unique message in a way that is striking and unforgettable by taking advantage of SYS-CON's unmatched high-impact, result-driven event / media packages.
SYS-CON Events announced today that EastBanc Technologies will exhibit at SYS-CON's 18th International Cloud Expo®, which will take place on June 7-9, 2016, at the Javits Center in New York City, NY. EastBanc Technologies has been working at the frontier of technology since 1999. Today, the firm provides full-lifecycle software development delivering flexible technology solutions that seamlessly integrate with existing systems – whether on premise or cloud. EastBanc Technologies partners with p...
18th Cloud Expo, taking place June 7-9, 2016, 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. Meanwhile, 94% of enterprises are using some...
Companies can harness IoT and predictive analytics to sustain business continuity; predict and manage site performance during emergencies; minimize expensive reactive maintenance; and forecast equipment and maintenance budgets and expenditures. Providing cost-effective, uninterrupted service is challenging, particularly for organizations with geographically dispersed operations.
SYS-CON Events announced today that Commvault, a global leader in enterprise data protection and information management, has been named “Bronze Sponsor” of SYS-CON's 18th International Cloud Expo, which will take place on June 7–9, 2016, at the Javits Center in New York City, NY, and the 19th International Cloud Expo, which will take place on November 1–3, 2016, at the Santa Clara Convention Center in Santa Clara, CA. Commvault is a leading provider of data protection and information management...
The essence of data analysis involves setting up data pipelines that consist of several operations that are chained together – starting from data collection, data quality checks, data integration, data analysis and data visualization (including the setting up of interaction paths in that visualization). In our opinion, the challenges stem from the technology diversity at each stage of the data pipeline as well as the lack of process around the analysis.
What a difference a year makes. Organizations aren’t just talking about IoT possibilities, it is now baked into their core business strategy. With IoT, billions of devices generating data from different companies on different networks around the globe need to interact. From efficiency to better customer insights to completely new business models, IoT will turn traditional business models upside down. In the new customer-centric age, the key to success is delivering critical services and apps wit...
SoftLayer operates a global cloud infrastructure platform built for Internet scale. With a global footprint of data centers and network points of presence, SoftLayer provides infrastructure as a service to leading-edge customers ranging from Web startups to global enterprises. SoftLayer's modular architecture, full-featured API, and sophisticated automation provide unparalleled performance and control. Its flexible unified platform seamlessly spans physical and virtual devices linked via a world...
SYS-CON Events announced today that Tintri Inc., a leading producer of VM-aware storage (VAS) for virtualization and cloud environments, will exhibit at the 18th International CloudExpo®, which will take place on June 7-9, 2016, at the Javits Center in New York City, New York, and the 19th International Cloud Expo, which will take place on November 1–3, 2016, at the Santa Clara Convention Center in Santa Clara, CA.
Designing IoT applications is complex, but deploying them in a scalable fashion is even more complex. A scalable, API first IaaS cloud is a good start, but in order to understand the various components specific to deploying IoT applications, one needs to understand the architecture of these applications and figure out how to scale these components independently. In his session at @ThingsExpo, Nara Rajagopalan is CEO of Accelerite, will discuss the fundamental architecture of IoT applications, ...
The IoT is changing the way enterprises conduct business. In his session at @ThingsExpo, Eric Hoffman, Vice President at EastBanc Technologies, discuss how businesses can gain an edge over competitors by empowering consumers to take control through IoT. We'll cite examples such as a Washington, D.C.-based sports club that leveraged IoT and the cloud to develop a comprehensive booking system. He'll also highlight how IoT can revitalize and restore outdated business models, making them profitable...
In his session at 18th Cloud Expo, Bruce Swann, Senior Product Marketing Manager at Adobe, will discuss how the Adobe Marketing Cloud can help marketers embrace opportunities for personalized, relevant and real-time customer engagement across offline (direct mail, point of sale, call center) and digital (email, website, SMS, mobile apps, social networks, connected objects). Bruce Swann has more than 15 years of experience working with digital marketing disciplines like web analytics, social med...