Welcome!

Industrial IoT Authors: Liz McMillan, Elizabeth White, Pat Romanski, Radu Gheorghe, Yeshim Deniz

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
In his keynote at @ThingsExpo, Chris Matthieu, Director of IoT Engineering at Citrix and co-founder and CTO of Octoblu, focused on building an IoT platform and company. He provided a behind-the-scenes look at Octoblu’s platform, business, and pivots along the way (including the Citrix acquisition of Octoblu).
You think you know what’s in your data. But do you? Most organizations are now aware of the business intelligence represented by their data. Data science stands to take this to a level you never thought of – literally. The techniques of data science, when used with the capabilities of Big Data technologies, can make connections you had not yet imagined, helping you discover new insights and ask new questions of your data. In his session at @ThingsExpo, Sarbjit Sarkaria, data science team lead ...
SYS-CON Events announced today that IoT Now has been named “Media Sponsor” of SYS-CON's 20th International Cloud Expo, which will take place on June 6–8, 2017, at the Javits Center in New York City, NY. IoT Now explores the evolving opportunities and challenges facing CSPs, and it passes on some lessons learned from those who have taken the first steps in next-gen IoT services.
SYS-CON Events announced today that WineSOFT will exhibit at SYS-CON's 20th International Cloud Expo®, which will take place on June 6-8, 2017, at the Javits Center in New York City, NY. Based in Seoul and Irvine, WineSOFT is an innovative software house focusing on internet infrastructure solutions. The venture started as a bootstrap start-up in 2010 by focusing on making the internet faster and more powerful. WineSOFT’s knowledge is based on the expertise of TCP/IP, VPN, SSL, peer-to-peer, mob...
The Internet of Things can drive efficiency for airlines and airports. In their session at @ThingsExpo, Shyam Varan Nath, Principal Architect with GE, and Sudip Majumder, senior director of development at Oracle, discussed the technical details of the connected airline baggage and related social media solutions. These IoT applications will enhance travelers' journey experience and drive efficiency for the airlines and the airports.
Big Data, cloud, analytics, contextual information, wearable tech, sensors, mobility, and WebRTC: together, these advances have created a perfect storm of technologies that are disrupting and transforming classic communications models and ecosystems. In his session at @ThingsExpo, Erik Perotti, Senior Manager of New Ventures on Plantronics’ Innovation team, provided an overview of this technological shift, including associated business and consumer communications impacts, and opportunities it m...
With billions of sensors deployed worldwide, the amount of machine-generated data will soon exceed what our networks can handle. But consumers and businesses will expect seamless experiences and real-time responsiveness. What does this mean for IoT devices and the infrastructure that supports them? More of the data will need to be handled at - or closer to - the devices themselves.
SYS-CON Events announced today that Dataloop.IO, an innovator in cloud IT-monitoring whose products help organizations save time and money, has been named “Bronze Sponsor” of SYS-CON's 20th International Cloud Expo®, which will take place on June 6-8, 2017, at the Javits Center in New York City, NY. Dataloop.IO is an emerging software company on the cutting edge of major IT-infrastructure trends including cloud computing and microservices. The company, founded in the UK but now based in San Fran...
Things are changing so quickly in IoT that it would take a wizard to predict which ecosystem will gain the most traction. In order for IoT to reach its potential, smart devices must be able to work together. Today, there are a slew of interoperability standards being promoted by big names to make this happen: HomeKit, Brillo and Alljoyn. In his session at @ThingsExpo, Adam Justice, vice president and general manager of Grid Connect, will review what happens when smart devices don’t work togethe...
A strange thing is happening along the way to the Internet of Things, namely far too many devices to work with and manage. It has become clear that we'll need much higher efficiency user experiences that can allow us to more easily and scalably work with the thousands of devices that will soon be in each of our lives. Enter the conversational interface revolution, combining bots we can literally talk with, gesture to, and even direct with our thoughts, with embedded artificial intelligence, whic...
In his session at @ThingsExpo, Sudarshan Krishnamurthi, a Senior Manager, Business Strategy, at Cisco Systems, will discuss how IT and operational technology (OT) work together, as opposed to being in separate siloes as once was traditional. Attendees will learn how to fully leverage the power of IoT in their organization by bringing the two sides together and bridging the communication gap. He will also look at what good leadership must entail in order to accomplish this, and how IT managers ca...
In his keynote at 18th Cloud Expo, Andrew Keys, Co-Founder of ConsenSys Enterprise, provided 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 settle...
SYS-CON Events announced today that CA Technologies has been named “Platinum Sponsor” of SYS-CON's 20th International Cloud Expo®, which will take place on June 6-8, 2017, at the Javits Center in New York City, NY, and the 21st International Cloud Expo®, which will take place October 31-November 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. CA Technologies helps customers succeed in a future where every business – from apparel to energy – is being rewritten by software. From ...
TechTarget storage websites are the best online information resource for news, tips and expert advice for the storage, backup and disaster recovery markets. By creating abundant, high-quality editorial content across more than 140 highly targeted technology-specific websites, TechTarget attracts and nurtures communities of technology buyers researching their companies' information technology needs. By understanding these buyers' content consumption behaviors, TechTarget creates the purchase inte...
SYS-CON Events announced today that Cloud Academy will exhibit at SYS-CON's 20th International Cloud Expo®, which will take place on June 6-8, 2017, at the Javits Center in New York City, NY. Cloud Academy is the industry’s most innovative, vendor-neutral cloud technology training platform. Cloud Academy provides continuous learning solutions for individuals and enterprise teams for Amazon Web Services, Microsoft Azure, Google Cloud Platform, and the most popular cloud computing technologies. Ge...
The best way to leverage your Cloud Expo presence as a sponsor and exhibitor is to plan your news announcements around our events. The press covering Cloud Expo and @ThingsExpo will have access to these releases and will amplify your news announcements. More than two dozen Cloud companies either set deals at our shows or have announced their mergers and acquisitions at Cloud Expo. Product announcements during our show provide your company with the most reach through our targeted audiences.
SYS-CON Events announced today that Fusion, a leading provider of cloud services, will exhibit at SYS-CON's 20th International Cloud Expo®, which will take place on June 6-8, 2017, at the Javits Center in New York City, NY. Fusion, a leading provider of integrated cloud solutions to small, medium and large businesses, is the industry’s single source for the cloud. Fusion’s advanced, proprietary cloud service platform enables the integration of leading edge solutions in the cloud, including cloud...
Your homes and cars can be automated and self-serviced. Why can't your storage? From simply asking questions to analyze and troubleshoot your infrastructure, to provisioning storage with snapshots, recovery and replication, your wildest sci-fi dream has come true. In his session at @DevOpsSummit at 20th Cloud Expo, Dan Florea, Director of Product Management at Tintri, will provide a ChatOps demo where you can talk to your storage and manage it from anywhere, through Slack and similar services ...
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.
Have you ever noticed how some IT people seem to lead successful, rewarding, and satisfying lives and careers, while others struggle? IT author and speaker Don Crawley uncovered the five principles that successful IT people use to build satisfying lives and careers and he shares them in this fast-paced, thought-provoking webinar. You'll learn the importance of striking a balance with technical skills and people skills, challenge your pre-existing ideas about IT customer service, and gain new in...