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https://issues.apache.org/jira/browse/FLINK-4246?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15389543#comment-15389543
 ] 

ASF GitHub Bot commented on FLINK-4246:
---------------------------------------

Github user zentol commented on a diff in the pull request:

    https://github.com/apache/flink/pull/2285#discussion_r71882781
  
    --- Diff: 
flink-core/src/main/java/org/apache/flink/metrics/MetricRegistry.java ---
    @@ -75,77 +78,92 @@ public MetricRegistry(Configuration config) {
                this.delimiter = delim;
     
                // second, instantiate any custom configured reporters
    -           
    -           final String className = 
config.getString(ConfigConstants.METRICS_REPORTER_CLASS, null);
    -           if (className == null) {
    +           this.reporters = new ArrayList<>();
    +
    +           final String definedReporters = 
config.getString(ConfigConstants.METRICS_REPORTERS_LIST, null);
    +
    +           if (definedReporters == null) {
    +                   // no reporters defined
                        // by default, don't report anything
                        LOG.info("No metrics reporter configured, no metrics 
will be exposed/reported.");
    -                   this.reporter = null;
                        this.executor = null;
    -           }
    -           else {
    -                   MetricReporter reporter;
    -                   ScheduledExecutorService executor = null;
    -                   try {
    -                           String configuredPeriod = 
config.getString(ConfigConstants.METRICS_REPORTER_INTERVAL, null);
    -                           TimeUnit timeunit = TimeUnit.SECONDS;
    -                           long period = 10;
    -                           
    -                           if (configuredPeriod != null) {
    -                                   try {
    -                                           String[] interval = 
configuredPeriod.split(" ");
    -                                           period = 
Long.parseLong(interval[0]);
    -                                           timeunit = 
TimeUnit.valueOf(interval[1]);
    +           } else {
    +                   // we have some reporters so
    +                   String[] namedReporters = definedReporters.split(",");
    +                   for (String namedReporter : namedReporters) {
    --- End diff --
    
    Can it happen that namedReporters is an empty String?


> Allow Specifying Multiple Metrics Reporters
> -------------------------------------------
>
>                 Key: FLINK-4246
>                 URL: https://issues.apache.org/jira/browse/FLINK-4246
>             Project: Flink
>          Issue Type: Improvement
>          Components: Metrics
>    Affects Versions: 1.1.0
>            Reporter: Aljoscha Krettek
>            Assignee: Aljoscha Krettek
>             Fix For: 1.1.0
>
>
> We should allow specifying multiple reporters. A rough sketch of how the 
> configuration should look like is this:
> {code}
> metrics.reporters = foo,bar
> metrics.reporter.foo.class = JMXReporter.class
> metrics.reporter.foo.port = 42-117
> metrics.reporter.bar.class = GangliaReporter.class
> metrics.reporter.bar.port = 512
> metrics.reporter.bar.whatever = 2
> {code}



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