Flink1.11.2 on YARN滚动日志配置

Flink1.11 on Yarn默认日志是log4j  MainAppender非滚动的。如果是流式任务，任务就会常驻，这样日志文件会越来越大(尤其是Task Managers日志)，不加处理磁盘空间就会越占越大，页面日志加载响应也会卡顿。所以可以对Flink的日志做一个滚动配置，这样就可以控制日志文件大小。

flink on yarn用的log配置默认是flink/conf/log4j.properties配置文件，可修改为：

# 滚动日志的配置
# This affects logging for both user code and Flink
rootLogger.level = DEBUG
rootLogger.appenderRef.rolling.ref = RollingFileAppender
 
# 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.kafka.name= org.apache.kafka
logger.kafka.level = INFO
logger.hadoop.name = org.apache.hadoop
logger.hadoop.level = INFO
logger.zookeeper.name = org.apache.zookeeper
logger.zookeeper.level = INFO
 
# Log all infos in the given rolling file
appender.rolling.name = RollingFileAppender
appender.rolling.type = RollingFile
appender.rolling.append = false
#日志文件名
appender.rolling.fileName = ${sys:log.file}
#指定当发生文件滚动时，文件重命名规则
appender.rolling.filePattern = ${sys:log.file}.%i
appender.rolling.layout.type = PatternLayout
# 输出模板
appender.rolling.layout.pattern = %d{yyyy-MM-dd HH:mm:ss,SSS} %-5p %-60c %x - %m%n
# 指定记录文件的保存策略，该策略主要是完成周期性的日志文件保存工作
appender.rolling.policies.type = Policies
# 基于日志文件大小的触发策略
appender.rolling.policies.size.type = SizeBasedTriggeringPolicy
# 当日志文件大小大于size指定的值时，触发滚动
appender.rolling.policies.size.size = 5MB
# 文件保存的覆盖策略
appender.rolling.strategy.type = DefaultRolloverStrategy
# 生成分割（保存）文件的个数，默认为5(-1,-2,-3,-4,-5)
appender.rolling.strategy.max = 10
 
# Suppress the irrelevant (wrong) warnings from the Netty channel handler
logger.netty.name = org.apache.flink.shaded.akka.org.jboss.netty.channel.DefaultChannelPipeline
logger.netty.level = OFF

 

参考：

Flink 1.11.1 滚动日志配置

一张图轻松掌握 Flink on YARN 应用启动全流程（上）