Madhusoodan created HADOOP-17081: ------------------------------------ Summary: MetricsSystem restart doesn't register the sinks back Key: HADOOP-17081 URL: https://issues.apache.org/jira/browse/HADOOP-17081 Project: Hadoop Common Issue Type: Bug Components: metrics Environment: NA Reporter: Madhusoodan
In HBase we use dynamic metrics and when a metric is removed, we have to refresh the JMX beans, since there is no API from Java to do it, a hack like stopping the metrics system and restarting it was used (Read the comment on the class [https://github.com/mmpataki/hbase/blob/master/hbase-hadoop-compat/src/main/java/org/apache/hadoop/metrics2/impl/JmxCacheBuster.java]) It calls the below APIs in the same order MetricsSystem.stop MetricsSystem.start MetricsSystem.stop stops all the SinkAdapters, *but doesn't remove them from the sink list* (allSinks is the variable). When the metrics system is started again, *it is assumed that the SinkAdapters are restarted, but they are not* due to the check done in the beginning of the function register. -- This message was sent by Atlassian Jira (v8.3.4#803005) --------------------------------------------------------------------- To unsubscribe, e-mail: common-dev-unsubscr...@hadoop.apache.org For additional commands, e-mail: common-dev-h...@hadoop.apache.org