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+#
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+#
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+# Licensed to the Apache Software Foundation (ASF) under one
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+# or more contributor license agreements. See the NOTICE file
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+# distributed with this work for additional information
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+# regarding copyright ownership. The ASF licenses this file
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+# to you under the Apache License, Version 2.0 (the
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+# "License"); you may not use this file except in compliance
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+# with the License. You may obtain a copy of the License at
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+#
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+# http://www.apache.org/licenses/LICENSE-2.0
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+#
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+# Unless required by applicable law or agreed to in writing,
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+# software distributed under the License is distributed on an
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+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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+# KIND, either express or implied. See the License for the
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+# specific language governing permissions and limitations
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+# under the License.
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+#
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+#
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+
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+
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+# Define some default values that can be overridden by system properties
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+hadoop.root.logger=INFO,console
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+hadoop.log.dir=.
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+hadoop.log.file=hadoop.log
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+
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+#
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+# Job Summary Appender
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+#
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+# Use following logger to send summary to separate file defined by
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+# hadoop.mapreduce.jobsummary.log.file rolled daily:
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+# hadoop.mapreduce.jobsummary.logger=INFO,JSA
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+#
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+hadoop.mapreduce.jobsummary.logger=${hadoop.root.logger}
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+hadoop.mapreduce.jobsummary.log.file=hadoop-mapreduce.jobsummary.log
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+
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+# Define the root logger to the system property "hadoop.root.logger".
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+log4j.rootLogger=${hadoop.root.logger}, EventCounter
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+
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+# Logging Threshold
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+log4j.threshhold=ALL
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+
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+#
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+# Daily Rolling File Appender
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+#
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+
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+log4j.appender.DRFA=org.apache.log4j.DailyRollingFileAppender
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+log4j.appender.DRFA.File=${hadoop.log.dir}/${hadoop.log.file}
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+
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+# Rollver at midnight
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+log4j.appender.DRFA.DatePattern=.yyyy-MM-dd
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+
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+# 30-day backup
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+#log4j.appender.DRFA.MaxBackupIndex=30
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+log4j.appender.DRFA.layout=org.apache.log4j.PatternLayout
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+
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+# Pattern format: Date LogLevel LoggerName LogMessage
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+log4j.appender.DRFA.layout.ConversionPattern=%d{ISO8601} %p %c: %m%n
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+# Debugging Pattern format
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+#log4j.appender.DRFA.layout.ConversionPattern=%d{ISO8601} %-5p %c{2} (%F:%M(%L)) - %m%n
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+
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+
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+#
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+# console
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+# Add "console" to rootlogger above if you want to use this
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+#
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+
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+log4j.appender.console=org.apache.log4j.ConsoleAppender
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+log4j.appender.console.target=System.err
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+log4j.appender.console.layout=org.apache.log4j.PatternLayout
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+log4j.appender.console.layout.ConversionPattern=%d{yy/MM/dd HH:mm:ss} %p %c{2}: %m%n
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+
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+#
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+# TaskLog Appender
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+#
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+
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+#Default values
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+hadoop.tasklog.taskid=null
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+hadoop.tasklog.iscleanup=false
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+hadoop.tasklog.noKeepSplits=4
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+hadoop.tasklog.totalLogFileSize=100
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+hadoop.tasklog.purgeLogSplits=true
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+hadoop.tasklog.logsRetainHours=12
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+
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+log4j.appender.TLA=org.apache.hadoop.mapred.TaskLogAppender
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+log4j.appender.TLA.taskId=${hadoop.tasklog.taskid}
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+log4j.appender.TLA.isCleanup=${hadoop.tasklog.iscleanup}
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+log4j.appender.TLA.totalLogFileSize=${hadoop.tasklog.totalLogFileSize}
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+
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+log4j.appender.TLA.layout=org.apache.log4j.PatternLayout
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+log4j.appender.TLA.layout.ConversionPattern=%d{ISO8601} %p %c: %m%n
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+
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+#
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+# Rolling File Appender
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+#
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+
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+#log4j.appender.RFA=org.apache.log4j.RollingFileAppender
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+#log4j.appender.RFA.File=${hadoop.log.dir}/${hadoop.log.file}
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+
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+# Logfile size and and 30-day backups
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+#log4j.appender.RFA.MaxFileSize=1MB
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+#log4j.appender.RFA.MaxBackupIndex=30
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+
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+#log4j.appender.RFA.layout=org.apache.log4j.PatternLayout
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+#log4j.appender.RFA.layout.ConversionPattern=%d{ISO8601} %-5p %c{2} - %m%n
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+#log4j.appender.RFA.layout.ConversionPattern=%d{ISO8601} %-5p %c{2} (%F:%M(%L)) - %m%n
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+
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+
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+# Custom Logging levels
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+
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+hadoop.metrics.log.level=INFO
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+#log4j.logger.org.apache.hadoop.mapred.JobTracker=DEBUG
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+#log4j.logger.org.apache.hadoop.mapred.TaskTracker=DEBUG
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+#log4j.logger.org.apache.hadoop.fs.FSNamesystem=DEBUG
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+log4j.logger.org.apache.hadoop.metrics2=${hadoop.metrics.log.level}
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+
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+# Jets3t library
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+log4j.logger.org.jets3t.service.impl.rest.httpclient.RestS3Service=ERROR
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+
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+#
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+# Null Appender
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+# Trap security logger on the hadoop client side
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+#
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+log4j.appender.NullAppender=org.apache.log4j.varia.NullAppender
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+
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+#
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+# Event Counter Appender
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+# Sends counts of logging messages at different severity levels to Hadoop Metrics.
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+#
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+log4j.appender.EventCounter=org.apache.hadoop.log.metrics.EventCounter
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+
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Siddharth Wagle