[FLINK-2337] Multiple SLF4J bindings using Storm compatibility layer

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 0.10.0
• Component/s: flink-contrib
• Assignee: Matthias J. Sax
• Reporter: Matthias J. Sax
• Created: 09/Jul/15 12:16
• Updated: 13/Jul/15 15:53
• Resolved: 13/Jul/15 15:50

Description

Storm depends on logback as slf4j implemenation but Flink uses log4j. The log shows the following conflict:

SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/home/cicero/.m2/repository/ch/qos/logback/logback-classic/1.0.13/logback-classic-1.0.13.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/home/cicero/.m2/repository/org/slf4j/slf4j-log4j12/1.7.7/slf4j-log4j12-1.7.7.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.

Need to exclude logback from storm dependencies to fix this.