kafka-1285; enable log4j in unit test; patched by Jun Rao; reviewed by Neha Narkhede

README.md

@@ -16,6 +16,10 @@ Follow instuctions in http://kafka.apache.org/documentation.html#quickstart
 ### Running a particular unit test ###
     ./gradlew -Dtest.single=RequestResponseSerializationTest core:test
 
+### Running a particular unit test with log4j output ###
+    change the log4j setting in either clients/src/test/resources/log4j.properties or core/src/test/resources/log4j.properties
+    ./gradlew -i -Dtest.single=RequestResponseSerializationTest core:test
+
 ### Building a binary release gzipped tar ball ###
     ./gradlew clean
     ./gradlew releaseTarGz  

build.gradle

@@ -20,6 +20,8 @@ buildscript {
   apply from: file('gradle/buildscript.gradle'), to: buildscript
 }
 
+slf4jlog4j='org.slf4j:slf4j-log4j12:1.7.6'
+
 allprojects {
   apply plugin: 'idea'
   repositories {
@@ -163,6 +165,7 @@ project(':core') {
     } else {
       testCompile "org.scalatest:scalatest_$scalaVersion:1.8"
     }   
+    testRuntime "$slf4jlog4j"
 
     zinc 'com.typesafe.zinc:zinc:0.2.5'
   }
@@ -312,6 +315,7 @@ project(':clients') {
   dependencies {
     compile "org.slf4j:slf4j-api:1.7.6"
     testCompile 'com.novocode:junit-interface:0.9'
+    testRuntime "$slf4jlog4j"
   }
 
   jar {

clients/src/test/resources/log4j.properties

@@ -0,0 +1,21 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+log4j.rootLogger=OFF, stdout
+
+log4j.appender.stdout=org.apache.log4j.ConsoleAppender
+log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
+log4j.appender.stdout.layout.ConversionPattern=[%d] %p %m (%c:%L)%n
+
+log4j.logger.org.apache.kafka=ERROR

core/src/test/resources/log4j.properties

@@ -19,6 +19,7 @@ log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
 log4j.appender.stdout.layout.ConversionPattern=[%d] %p %m (%c:%L)%n
 
 log4j.logger.kafka=ERROR
+log4j.logger.org.apache.kafka=ERROR
 
 # zkclient can be verbose, during debugging it is common to adjust is separately
 log4j.logger.org.I0Itec.zkclient.ZkClient=WARN