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https://issues.apache.org/jira/browse/FLINK-4326?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15875143#comment-15875143
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Michi Mutsuzaki commented on FLINK-4326:
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flink-console.sh doesn't define log_setting, and i'm getting a warning like
this:
{noformat}
% ./bin/flink-console.sh jobmanager --configDir conf --executionMode cluster
Starting jobmanager as a console application on host x1.
log4j:WARN No appenders could be found for logger
(org.apache.hadoop.metrics2.lib.MutableMetricsFactory).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more
info.
{noformat}
maybe it makes sense to provide log4j/logback config files that log to console,
and define log_setting to point to these config files?
> Flink start-up scripts should optionally start services on the foreground
> -------------------------------------------------------------------------
>
> Key: FLINK-4326
> URL: https://issues.apache.org/jira/browse/FLINK-4326
> Project: Flink
> Issue Type: Improvement
> Components: Startup Shell Scripts
> Affects Versions: 1.0.3
> Reporter: Elias Levy
>
> This has previously been mentioned in the mailing list, but has not been
> addressed. Flink start-up scripts start the job and task managers in the
> background. This makes it difficult to integrate Flink with most processes
> supervisory tools and init systems, including Docker. One can get around
> this via hacking the scripts or manually starting the right classes via Java,
> but it is a brittle solution.
> In addition to starting the daemons in the foreground, the start up scripts
> should use exec instead of running the commends, so as to avoid forks. Many
> supervisory tools assume the PID of the process to be monitored is that of
> the process it first executes, and fork chains make it difficult for the
> supervisor to figure out what process to monitor. Specifically,
> jobmanager.sh and taskmanager.sh should exec flink-daemon.sh, and
> flink-daemon.sh should exec java.
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