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https://issues.apache.org/jira/browse/SOLR-16066?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mike Drob resolved SOLR-16066.
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Resolution: Duplicate
> Fix unmanaged Thread in ZkController
> ------------------------------------
>
> Key: SOLR-16066
> URL: https://issues.apache.org/jira/browse/SOLR-16066
> Project: Solr
> Issue Type: Sub-task
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Houston Putman
> Priority: Major
>
> Currently the following is used to in {{ZKController.fireListeners()}}
> {code:java}
> new Thread(() -> {
> log.debug("Running listeners for {}", zkDir);
> for (final Runnable listener : listenersCopy) {
> try {
> listener.run();
> } catch (Exception e) {
> log.warn("listener throws error", e);
> }
> }
> }, "ZKEventListenerThread").start(); {code}
> This causes leaked threads in a variety of tests. We should either start to
> use a separate thread pool for this (and possibly run each listener in a
> separate thread), or merely run it in the same thread.
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