Logging in Flink

################################################################################
{% include 'apache_license.txt' %}
################################################################################

# Allows this configuration to be modified at runtime. The file will be checked every 30 seconds.
monitorInterval=30 (1)

# This affects logging for both user code and Flink
rootLogger.level = {{ services.flink.config.flink_conf.logging_level }} (2)
rootLogger.appenderRef.file.ref = MainAppender

# Uncomment this if you want to _only_ change Flink's logging
#logger.flink.name = org.apache.flink
#logger.flink.level = INFO

# The following lines keep the log level of common libraries/connectors on
# log level INFO. The root logger does not override this. You have to manually
# change the log levels here.
logger.akka.name = akka
logger.akka.level = INFO
logger.hadoop.name = org.apache.hadoop
logger.hadoop.level = INFO
logger.zookeeper.name = org.apache.zookeeper
logger.zookeeper.level = INFO
logger.shaded_zookeeper.name = org.apache.flink.shaded.zookeeper3
logger.shaded_zookeeper.level = INFO
{% raw %}
# Log all infos in the given file
appender.main.name = MainAppender
appender.main.type = RollingFile
appender.main.append = true
appender.main.fileName = ${sys:log.file} (3)
appender.main.filePattern = ${sys:log.file}.%i (4)
appender.main.layout.type = PatternLayout
appender.main.layout.pattern = %d{yyyy-MM-dd HH:mm:ss,SSS} %-5p %-60c %x - %m%n (5)
appender.main.policies.type = Policies
appender.main.policies.size.type = SizeBasedTriggeringPolicy (6)
appender.main.policies.size.size = 100MB
appender.main.policies.startup.type = OnStartupTriggeringPolicy (7)
appender.main.strategy.type = DefaultRolloverStrategy
appender.main.strategy.max = ${env:MAX_LOG_FILE_NUMBER:-10} (8)

# Suppress the irrelevant (wrong) warnings from the Netty channel handler
logger.netty.name = org.jboss.netty.channel.DefaultChannelPipeline
logger.netty.level = OFF
{% endraw %}