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www.orbitone.com
Raas van Gaverestraat 83
B-9000 GENT, Belgium
E-mail info@orbitone.com
Website www.orbitone.com
Tel. +32 ...
6 October, 2009
ELMAH Asp.NET exception logging, by Mel Gerats & Wim De Coninck
In this presentation
 What is ELMAH
 Why...
6 October, 2009
ELMAH Asp.NET exception logging, by Mel Gerats & Wim De Coninck3
What is ELMAH
Open source project
http:...
6 October, 2009
ELMAH Asp.NET exception logging, by Mel Gerats & Wim De Coninck4
6 October, 2009
ELMAH Asp.NET exception logging, by Mel Gerats & Wim De Coninck5
Why use ELMAH
 Track and analyze unhandl...
6 October, 2009
ELMAH Asp.NET exception logging, by Mel Gerats & Wim De Coninck6
Limitations
 One instance web applicatio...
6 October, 2009
ELMAH Asp.NET exception logging, by Mel Gerats & Wim De Coninck7
What we needed
 Exceptions always saved!...
6 October, 2009
ELMAH Asp.NET exception logging, by Mel Gerats & Wim De Coninck8
6 October, 2009
ELMAH Asp.NET exception logging, by Mel Gerats & Wim De Coninck9
Architecture
SQL server
ELMAH
Database
De...
 HttpModule deployed per
application or server wide
 Configured in web.config or
machine.config
 Error files to central...
 Web Service receives error
 Add classification, levels, metadata
 Save to database
 Receive heartbeats from agents
6 ...
Applications
12 ELMAH Asp.NET exception logging, by Mel Gerats & Wim De Coninck
6 October, 2009
Web site
Notifications
Rss...
6 October, 2009
ELMAH Asp.NET exception logging, by Mel Gerats & Wim De Coninck13
ELMAH HttpModule
When an error happens:...
6 October, 2009
ELMAH Asp.NET exception logging, by Mel Gerats & Wim De Coninck14
Agent
 Installed on web server as a win...
6 October, 2009
ELMAH Asp.NET exception logging, by Mel Gerats & Wim De Coninck15
Web service
 Receives errors from all a...
Web Site
16 ELMAH Asp.NET exception logging, by Mel Gerats & Wim De Coninck
6 October, 2009
 Last 100 Errors
 Search
Er...
Demo
17 ELMAH Asp.NET exception logging, by Mel Gerats & Wim De Coninck
6 October, 2009
Demo website
6 October, 2009
ELMAH Asp.NET exception logging, by Mel Gerats & Wim De Coninck18
Notifications
 Daily report:
overview ...
6 October, 2009
ELMAH Asp.NET exception logging, by Mel Gerats & Wim De Coninck19
Technologies used
 SQL Server
Data sto...
Database
6 October, 2009
ELMAH Asp.NET exception logging, by Mel Gerats & Wim De Coninck20
6 October, 2009
ELMAH Asp.NET exception logging, by Mel Gerats & Wim De Coninck21
Data Access
 OrbitOne.Base, ORM built o...
6 October, 2009
ELMAH Asp.NET exception logging, by Mel Gerats & Wim De Coninck22
Technologies used
 XML Data Type in SQL...
6 October, 2009
ELMAH Asp.NET exception logging, by Mel Gerats & Wim De Coninck23
Error filter rules
 Xpath selector
/err...
6 October, 2009
ELMAH Asp.NET exception logging, by Mel Gerats & Wim De Coninck24
Resources
 Orbit One ASP.NET Exception ...
www.orbitone.com
25 ELMAH Asp.NET exception logging, by Mel Gerats & Wim De Coninck
6 October, 2009
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Asp.net exception reporter

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The ASP.NET Exception Reporter is an exception handling and reporting tool developed by Orbit One. It is based on the ELMAH open source project and adds rich reporting and notification possibilities as well as strong exception aggregation and classification. The application is open source and can be found on http://aspexceptionreporter.codeplex.com/

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Transcript of "Asp.net exception reporter"

  1. 1. www.orbitone.com Raas van Gaverestraat 83 B-9000 GENT, Belgium E-mail info@orbitone.com Website www.orbitone.com Tel. +32 9 265 74 20 Fax +32 9 265 74 10 VAT BE 456.457.353 Bank 442-7059001-50 (KBC) 6 October, 2009 ASP.NET Exception Reporter by Mel Gerats & Wim De Coninck
  2. 2. 6 October, 2009 ELMAH Asp.NET exception logging, by Mel Gerats & Wim De Coninck In this presentation  What is ELMAH  Why use it  ASP.NET Exception Reporter
  3. 3. 6 October, 2009 ELMAH Asp.NET exception logging, by Mel Gerats & Wim De Coninck3 What is ELMAH Open source project http://code.google.com/p/elmah/ Error Logging Modules And Handlers Plug and play
  4. 4. 6 October, 2009 ELMAH Asp.NET exception logging, by Mel Gerats & Wim De Coninck4
  5. 5. 6 October, 2009 ELMAH Asp.NET exception logging, by Mel Gerats & Wim De Coninck5 Why use ELMAH  Track and analyze unhandled exceptions  Solve errors before they are reported  Keep track of errors over time  Can be added to existing web sites without changing code  Show friendly error page but save the error somewhere  Compatible with web sites web services .net 1.x, 2.0, 3.x SharePoint
  6. 6. 6 October, 2009 ELMAH Asp.NET exception logging, by Mel Gerats & Wim De Coninck6 Limitations  One instance web application  Overview through HttpHandler (elmah.axd)  Only limited reporting
  7. 7. 6 October, 2009 ELMAH Asp.NET exception logging, by Mel Gerats & Wim De Coninck7 What we needed  Exceptions always saved!  Central reporting website for all applications  Notifications  Additional filters and classification  Installation on remote servers with no direct access to our database
  8. 8. 6 October, 2009 ELMAH Asp.NET exception logging, by Mel Gerats & Wim De Coninck8
  9. 9. 6 October, 2009 ELMAH Asp.NET exception logging, by Mel Gerats & Wim De Coninck9 Architecture SQL server ELMAH Database Developers Administrators ELMAH notification server SEP 13 Windows scheduled task Starts the email notifier command line application: - every 30 minutes - daily at 20 PM Intelligent Error Filter - Error level (0-5) -Error type (Infrastructure / Code) ELMAH web service ELMAH Web server Web interface ELMAH HttpModule XML Folder Web server(s) Exceptions Exceptions Exceptions Exceptions Exceptions Exceptions Custom error Page Redirect to Exceptions In XML format Filesystem Directory watcher Agent OleDb OleDbHttps OleDb Email http Consulting webpages OleDb
  10. 10.  HttpModule deployed per application or server wide  Configured in web.config or machine.config  Error files to central folder on file system  Agents monitor file system folder. 6 October, 2009 ELMAH Asp.NET exception logging, by Mel Gerats & Wim De Coninck10 Web Server
  11. 11.  Web Service receives error  Add classification, levels, metadata  Save to database  Receive heartbeats from agents 6 October, 2009 ELMAH Asp.NET exception logging, by Mel Gerats & Wim De Coninck11 Web service Intelligent Error Filter - Error level (0-5) -Error type (Infrastructure / Code) ELMAH web service ELMAH Web server Web interface OleDb Https OleDb http Consulting webpages
  12. 12. Applications 12 ELMAH Asp.NET exception logging, by Mel Gerats & Wim De Coninck 6 October, 2009 Web site Notifications Rss feeds …
  13. 13. 6 October, 2009 ELMAH Asp.NET exception logging, by Mel Gerats & Wim De Coninck13 ELMAH HttpModule When an error happens: Save all information Server variables Client information Form variables The original error page Saved as xml to a “Logs” folder Redirect to custom error page
  14. 14. 6 October, 2009 ELMAH Asp.NET exception logging, by Mel Gerats & Wim De Coninck14 Agent  Installed on web server as a windows service  Monitors the “Logs” folder on the file system  Sends errors to the web service for processing  Saves errors that cannot be processed to an “invalid errors” folder  Sends a heartbeat every x minutes
  15. 15. 6 October, 2009 ELMAH Asp.NET exception logging, by Mel Gerats & Wim De Coninck15 Web service  Receives errors from all agents  Calculate error level, based on rules Final level = average level of all applied rules Example: “user agent contains “robot” => level 0  Give error a classification, based on rules Example: “remote address contains “192.168” => internal user  Saves the error to the database  Keeps track of the status of each agent based on heartbeats
  16. 16. Web Site 16 ELMAH Asp.NET exception logging, by Mel Gerats & Wim De Coninck 6 October, 2009  Last 100 Errors  Search Error id Time frame Application Error message  Filters Level Type User type  Application health status  Agents status
  17. 17. Demo 17 ELMAH Asp.NET exception logging, by Mel Gerats & Wim De Coninck 6 October, 2009 Demo website
  18. 18. 6 October, 2009 ELMAH Asp.NET exception logging, by Mel Gerats & Wim De Coninck18 Notifications  Daily report: overview of latest errors Applications with the most errors  Possibilities:  Instant notifications when certain events occur Lots of errors at a short interval Same error over and over Patterns
  19. 19. 6 October, 2009 ELMAH Asp.NET exception logging, by Mel Gerats & Wim De Coninck19 Technologies used  SQL Server Data store  LinqToSQL Data access  ASP.NET, JQuery Website  Web Services Central access point  Windows services Agents  Scheduled Tasks Notifications
  20. 20. Database 6 October, 2009 ELMAH Asp.NET exception logging, by Mel Gerats & Wim De Coninck20
  21. 21. 6 October, 2009 ELMAH Asp.NET exception logging, by Mel Gerats & Wim De Coninck21 Data Access  OrbitOne.Base, ORM built on top of Nhibernate Custom Slow No Linq support  Nhibernate 2.1, with Linq provider Unfinished Strange results  LinqToSQL Fast! Easy
  22. 22. 6 October, 2009 ELMAH Asp.NET exception logging, by Mel Gerats & Wim De Coninck22 Technologies used  XML Data Type in SQL server  index on xml fields
  23. 23. 6 October, 2009 ELMAH Asp.NET exception logging, by Mel Gerats & Wim De Coninck23 Error filter rules  Xpath selector /error[@detail[contains(.,'General network error')]]  Error Filter Rule Level = 0 Type = Infrastructure  Rule can have multiple selectors, is applied when one is applicable  All rules are applied on all errors  Final level is the average level
  24. 24. 6 October, 2009 ELMAH Asp.NET exception logging, by Mel Gerats & Wim De Coninck24 Resources  Orbit One ASP.NET Exception Reporter on Codeplex http://aspexceptionreporter.codeplex.com  ELMAH on Google Code http://code.google.com/p/elmah/  Documentation http://aspexceptionreporter.codeplex.com/documentation  ELMAH @ StackOverflow http://stackoverflow.com/questions/tagged/elmah
  25. 25. www.orbitone.com 25 ELMAH Asp.NET exception logging, by Mel Gerats & Wim De Coninck 6 October, 2009
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