What is the modulation method at the hadoop log level

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Log4j is responsible for hadoop's log. But after reading the document, it is found that the configuration of log4j will be overwritten.

Then you have to go somewhere to cover it.

Several places were found.

There is a log level configuration in hadoop-env.sh.

Change info level to WARN level.

Then there are also environment variables on the log level in hadoop-daemon.sh. Need。

It's the same. The log level of yarn also needs to be in the corresponding.

Yarn-env.sh

Modify it in yarn-daemon.sh.

The same is true of hbase.

Corresponding hbase-env.sh hbase-daemon.sh

Another place where hosts are needed is log4j.properties under the conf directory.

There is also a configuration about the log level.

There is a configuration if you also want to change to warn level, then modify it here.

Then restart it.

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