[jira] [Created] (LOG4J2-3403) java.lang.ClassNotFoundException: org.slf4j.bridge.SLF4JBridgeHandler

["Jitin Dominic (Jira)" <ji...@apache.org>]

Jitin Dominic created LOG4J2-3403:
-------------------------------------

             Summary: java.lang.ClassNotFoundException: org.slf4j.bridge.SLF4JBridgeHandler
                 Key: LOG4J2-3403
                 URL: https://issues.apache.org/jira/browse/LOG4J2-3403
             Project: Log4j 2
          Issue Type: Question
            Reporter: Jitin Dominic


I'm using the latest (v2.17.1) log4j2 dependencies in my grails 2.5.4 application. Following are the dependencies used:
 * log4j-api
 * log4j-core
 * log4j-1.2-api
 * log4j-slf4j-impl

 

We also have spark dependencies in our application for generating parquet files: 
{code:java}
compile ("org.apache.spark:spark-core_2.12:3.1.2") {
  exclude group: 'org.slf4j'
}

compile ("org.apache.spark:spark-sql_2.12:3.1.2") {
 exclude group: 'org.slf4j'
}

compile ("org.apache.spark:spark-catalyst_2.12:3.1.2") {
 exclude group: 'org.slf4j'
} {code}
 

When we try to generate parquet file, we get following exception:
{code:java}
java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
    at org.apache.spark.sql.execution.datasources.DataSource.providingInstance(DataSource.scala:112)
    at org.apache.spark.sql.execution.datasources.DataSource.planForWriting(DataSource.scala:567)
    at org.apache.spark.sql.DataFrameWriter.saveToV1Source(DataFrameWriter.scala:438)
    at org.apache.spark.sql.DataFrameWriter.saveInternal(DataFrameWriter.scala:415)
    at org.apache.spark.sql.DataFrameWriter.save(DataFrameWriter.scala:293)
    at org.apache.spark.sql.DataFrameWriter.parquet(DataFrameWriter.scala:874)
    at org.apache.spark.sql.DataFrameWriter$parquet.call(Unknown Source)
.
.
.
Caused by: java.lang.NoClassDefFoundError: org/slf4j/bridge/SLF4JBridgeHandler
    at org.apache.spark.sql.execution.datasources.parquet.ParquetFileFormat.<init>(ParquetFileFormat.scala:63)
    ... 102 more
Caused by: java.lang.ClassNotFoundException: org.slf4j.bridge.SLF4JBridgeHandler
    at java.net.URLClassLoader.findClass(URLClassLoader.java:387)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:352)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
    ... 103 more
 {code}
 

This is happening because we have org.slf4j from the spark dependencies as mentioned above.

When we try to include org.slf4j, we keep getting warning regarding multiple bindings of slf4j.

 

Can someone confirm if there's some issue with the configuration or is it a bug?

 

 



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