How to generate a trace for the HTTP requests executed by Studio

[TalendSolutionExpert]

Question

How do you generate a trace of the HTTP requests executed by the Talend Studio without using a third-party tool?

Answer

1. Create a logging.properties file (in the c:\temp folder for example) containing the following lines:

.level=FINEST
handlers = java.util.logging.FileHandler
java.util.logging.FileHandler.pattern = c:/temp/debug.txt
java.util.logging.FileHandler.limit = 20480KB
java.util.logging.FileHandler.count = 10
java.util.logging.FileHandler.append = true
java.util.logging.FileHandler.formatter = java.util.logging.SimpleFormatter
 

2. Create a log4j.properties file (in the c:\temp folder for example) containing the following lines:

log4j.rootLogger=INFO, stdout
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n
log4j.logger.org.apache.http=DEBUG
log4j.logger.org.apache.http.wire=DEBUG

Note: the trace generated does not contain all the body of the HTTP requests. If you want to log the body of the HTTP requests and responses, use a HTTP proxy, such as Fiddler.

3. Start Talend Studio  by using the following commands:

On Windows : from a CMD window , execute the following 2 commands :

set _JAVA_OPTIONS=-Dlog4j.debug -Dlog4j.configuration=file:"c:\temp\log4j.properties" -Djava.util.logging.config.file=c:\temp\logging.properties
Talend-Studio-win-x86_64.exe --talendDebug > studio_debug.txt 2>&1

On Linux : from a shell terminal , execute the following 2 commands :

export _JAVA_OPTIONS='-Dlog4j.debug -Dlog4j.configuration=file:"/tmp/log4j.properties" -Djava.util.logging.config.file=/tmp/logging.properties'
Talend-Studio-linux-gtk-x86_64 --talendDebug > studio_debug.txt 2>&1

 

NOTE : On Linux , "adapt" the file  logging.properties :

java.util.logging.FileHandler.pattern = /tmp/debug.txt

Collect the 2 files : studio_debug.txt and debug.txt