Hadoop yarn调试

ResourceManager

Update log level

http://headnodehost:9014/logLevel

Download log file

Find the log url by the application page

curl -O http://headnodehost:9014/logs/yarn-resourcemanager-HEADNODE0.log

Application Master

Update log level

yarn.app.mapreduce.am.log.level

Similar configuration parameter:am.

dfs.namenode.logging.level

mapreduce.map.log.level

mapreduce.reduce.log.level

Download log file

application is not finished

curl http://workernode24.zampdmphdp.b1.internal.chinacloudapp.cn:30060/node/containerlogs/container_1438609276772_0006_01_000001/wankun/syslog/?start=0 > am.log

application is finished :

yarn application -list

usage: yarn logs -applicationId <application ID> [OPTIONS]

general options are:
-appOwner <Application Owner>   AppOwner (assumed to be current user if
not specified)
-containerId <Container ID>     ContainerId (must be specified if node
address is specified)
-nodeAddress <Node Address>     NodeAddress in the format nodename:port
(must be specified if container id is
specified)

Eg:

yarn logs -applicationId application_1438609276772_0008 -containerId container_1438609276772_0008_01_000001 -nodeAddress workernode19.zampdmphdp.b1.internal.chinacloudapp.cn > success.log

Note

If windows system

sed -i "s/</</g" am.log
sed -i "s/>/>/g" am.log
sed -i "s/^M//g" am.log