[AIRAVATA-2363] Unable to configure logging with log4j.properties file

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.17
• Component/s: Distribution
• Assignee: Marcus Christie
• Reporter: Marcus Christie
• Created: 07/Apr/17 20:41
• Updated: 28/Apr/17 13:29
• Resolved: 28/Apr/17 13:29

Description

Currently, when starting Airavata, I see this on the console:

SLF4J: Found binding in [jar:file:/home/airavata/master-deployment/api-orchestrator/apache-airavata-server-0.17-SNAPSHOT/lib/logback-classic-1.1.6.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/home/airavata/master-deployment/api-orchestrator/apache-airavata-server-0.17-SNAPSHOT/lib/slf4j-log4j12-1.7.25.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/home/airavata/master-deployment/api-orchestrator/apache-airavata-server-0.17-SNAPSHOT/lib/slf4j-simple-1.7.25.jar!/org/slf4j/impl/StaticLoggerBinder.class]

This means that there are 3 different bindings for SLF4J. There should only be one.

It also appears that it is picking up the logback binding, although unfortunately it doesn't explicitly say so. I say that because I don't see any log4j messages when I add -Dlog4j.debug as an argument.

If I delete from the lib directory

• logback-classic-1.1.6.jar
• and slf4j-simple-1.7.25.jar

Then slf4j uses log4j and the log4j.properties file in the bin/ directory is used for configuration.

As it stands right now, we are providing a log4j.properties file in the bin/ directory of the distribution that doesn't actually do anything. We should give users a way to configure logging.

I think there are a few options:

• go with log4j12 logging
  • the logback logging was added, I think, for the Kafka integration, so removing logback would remove the Kafka integration
• go with logback logging
• switch to something else like log4j 2.x
  • log4j 2 has Kafka integration, but I'm not sure how well it works