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System.out and System.err output the content to the taskmanager.out and taskmanager.err files. In a production environment, if flink users use them to print a lot of content, the limits of yarn or kubernetes may be exceeded, eventually causing the TaskManager to be killed. Flink supports redirect the System.out and System.err to the log file, and the log file can be rolled to avoid unlimited disk usage.
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System.out and System.err output the content to the taskmanager.out and taskmanager.err files. In a production environment, if flink users use them to print a lot of content, the limits of yarn or kubernetes may be exceeded, eventually causing the TaskManager to be killed. Flink supports redirect the System.out and System.err to the log file, and the log file can be rolled to avoid unlimited disk usage.