Managing Transitive Dependencies : sl4j version conflicts in gradle with Storm 1.0.1 and elasticsearch 5.2


(Gautham Rokkam) #1

We are facing sl4j version conflicts in gradle with Storm 1.0.1 and elasticsearch 5.2.

We found that the ElasticSearch needs bridge log4j-to-slf4j so that we can use desired loggers. Here we are trying to use logback-classic with slf4j.

The dependencies are defined as below:

dependencies {
compile 'org.slf4j:slf4j-api:1.7.21’
compile 'org.apache.logging.log4j:log4j-to-slf4j:2.6.2’
compile 'ch.qos.logback:logback-classic:1.1.10’
provided (‘org.apache.storm:storm-core:1.0.1’) {
exclude(group: ‘org.slf4j’, module: ‘slf4j-api’)
}
compile 'org.elasticsearch:elasticsearch:5.2.0’
compile ‘org.elasticsearch.client:x-pack-transport:5.2.0’
}
To resolve this I tried to exclude the slf4j from storm-core and add the same later as below:

configurations.all {
resolutionStrategy {
eachDependency { DependencyResolveDetails dependencyResolveDetails ->
final requestedDependency = dependencyResolveDetails.requested
if (requestedDependency.group == ‘org.slf4j’ && requestedDependency.name == ‘slf4j-api’) {
requestedDependency.setVersion “1.7.7”
}
}
}
}
But when topology is submitted we get error : SLF4J: Class path contains multiple SLF4J bindings. SLF4J: Found binding in [jar:file:/Users/gauthamr05/Documents/Apps/Storm/apache-storm-1.0.1/lib/log4j-slf4j-impl-2.1.jar!/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: Found binding in [jar:file:/Users/gauthamr05/Documents/workspace/xyz_app/build/libs/FullIndexing.jar!/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation. SLF4J: Actual binding is of type [org.apache.logging.slf4j.Log4jLoggerFactory] Exception in thread “main” java.lang.StackOverflowError at org.apache.logging.log4j.spi.LoggerRegistry.getOrCreateInnerMap(LoggerRegistry.java:140) at org.apache.logging.log4j.spi.LoggerRegistry.hasLogger(LoggerRegistry.java:154) at org.apache.logging.slf4j.SLF4JLoggerContext.getLogger(SLF4JLoggerContext.java:38) at org.apache.logging.slf4j.Log4jLoggerFactory.newLogger(Log4jLoggerFactory.java:37) at org.apache.logging.slf4j.Log4jLoggerFactory.newLogger(Log4jLoggerFactory.java:29) at org.apache.logging.log4j.spi.AbstractLoggerAdapter.getLogger(AbstractLoggerAdapter.java:47) at org.apache.logging.slf4j.Log4jLoggerFactory.getLogger(Log4jLoggerFactory.java:29) at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:277)