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https://issues.apache.org/jira/browse/SOLR-11898?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Erick Erickson updated SOLR-11898:
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Summary: ConcurrentModificationException when calling
org.apache.solr.core.SolrInfoBean.getMetricsSnapshot (was:
ConcurrentModificationException when calling
org.apache.solr.core.SolrInfoBean.getMetricsSnapshot(SolrInfoBean.java:62))
> ConcurrentModificationException when calling
> org.apache.solr.core.SolrInfoBean.getMetricsSnapshot
> -------------------------------------------------------------------------------------------------
>
> Key: SOLR-11898
> URL: https://issues.apache.org/jira/browse/SOLR-11898
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Components: metrics
> Affects Versions: 7.1
> Reporter: Jeff Miller
> Assignee: Erick Erickson
> Priority: Major
> Labels: newbie
> Original Estimate: 0.5h
> Remaining Estimate: 0.5h
>
> SOLR-11255 Updated to use ConcurrentHashMap.newKeySet(); for all metricNames
> implementation but missed a few classes.
> I see this exception happening once in a while:
> Cause0: java.util.ConcurrentModificationException Cause0-StackTrace: at
> java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1558) at
> java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:580)
> at
> org.apache.solr.util.stats.MetricUtils.convertMetrics(MetricUtils.java:248)
> at
> org.apache.solr.util.stats.MetricUtils.convertMetrics(MetricUtils.java:226)
> at org.apache.solr.core.SolrInfoBean.getMetricsSnapshot(SolrInfoBean.java:62)
>
> Three classes weren't updated from using a HashSet for metricNames:
> FastLRUCache, LFUCache and LRUCache
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