Chuan Liu created HADOOP-11105: ---------------------------------- Summary: MetricsSystemImpl could leak memory in registered callbacks Key: HADOOP-11105 URL: https://issues.apache.org/jira/browse/HADOOP-11105 Project: Hadoop Common Issue Type: Bug Affects Versions: 3.0.0 Reporter: Chuan Liu Assignee: Chuan Liu
In {{MetricsSystemImpl.register(final String name, final String description, final T sink)}} method, we will also add a callback function to the {{callbacks}} array list. However, upon unregistering, the callback function is not removed from the list in existing code. As a result, the memory allocated for the callback function could accumulate in the {{MetricsSystemImpl}} list. In one of our cluster, we have seen a case where there are about 874 MB memory retained by {{MetricsSystemImpl}}. -- This message was sent by Atlassian JIRA (v6.3.4#6332)