This PR of the CloudBees File Leak Detector Plugin that detects leaked selectors will show output similar to:

at java.nio.channels.spi.AbstractSelector.<init>(AbstractSelector.java:86)
at sun.nio.ch.SelectorImpl.<init>(SelectorImpl.java:54)
at sun.nio.ch.EPollSelectorImpl.<init>(EPollSelectorImpl.java:64)
at sun.nio.ch.EPollSelectorProvider.openSelector(EPollSelectorProvider.java:36)
at java.nio.channels.Selector.open(Selector.java:227)
at org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor.<init>(AbstractMultiworkerIOReactor.java:144)
at org.apache.http.impl.nio.reactor.DefaultConnectingIOReactor.<init>(DefaultConnectingIOReactor.java:81)
at org.apache.http.impl.nio.reactor.DefaultConnectingIOReactor.<init>(DefaultConnectingIOReactor.java:96)
at com.atlassian.httpclient.apache.httpcomponents.ApacheAsyncHttpClient.<init>(ApacheAsyncHttpClient.java:157)
at com.atlassian.httpclient.apache.httpcomponents.ApacheAsyncHttpClient.<init>(ApacheAsyncHttpClient.java:123)
at com.atlassian.httpclient.apache.httpcomponents.DefaultHttpClientFactory.doCreate(DefaultHttpClientFactory.java:68)
at com.atlassian.httpclient.apache.httpcomponents.DefaultHttpClientFactory.create(DefaultHttpClientFactory.java:35)
at com.atlassian.jira.rest.client.internal.async.AsynchronousHttpClientFactory.createClient(AsynchronousHttpClientFactory.java:63)
at com.atlassian.jira.rest.client.internal.async.AsynchronousJiraRestClientFactory.create(AsynchronousJiraRestClientFactory.java:35)
at com.atlassian.jira.rest.client.internal.async.AsynchronousJiraRestClientFactory.createWithBasicHttpAuthentication(AsynchronousJiraRestClientFactory.java:42)
at hudson.plugins.jira.JiraSite.createSession(JiraSite.java:280)
at hudson.plugins.jira.JiraSite.getSession(JiraSite.java:255)
at hudson.plugins.jira.JiraSite.getProjectKeys(JiraSite.java:351)
at hudson.plugins.jira.JiraSite.existsIssue(JiraSite.java:439)
at hudson.plugins.jira.JiraChangeLogAnnotator.annotate(JiraChangeLogAnnotator.java:70)
at hudson.scm.ChangeLogSet$Entry.getMsgAnnotated(ChangeLogSet.java:252)