Simon Willnauer created LUCENE-5443:
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Summary: DocValuesProducer#ramBytesUsed throws
ConcurrentModificationException
Key: LUCENE-5443
URL: https://issues.apache.org/jira/browse/LUCENE-5443
Project: Lucene - Core
Issue Type: Bug
Components: core/codecs
Affects Versions: 4.6.1, 4.6, 5.0, 4.7
Reporter: Simon Willnauer
Assignee: Simon Willnauer
Priority: Minor
Fix For: 5.0, 4.7
this came up in an [elasticsearch
issue|https://github.com/elasticsearch/elasticsearch/issues/5104] that if you
pull _#ramBytesUsed()_ while docvalues are loaded in a seperate thread you see
a _ConcurrentModificationException_ here is an example:
{noformat}
Caused by: java.util.ConcurrentModificationException
at java.util.HashMap$HashIterator.nextEntry(HashMap.java:926)
at java.util.HashMap$ValueIterator.next(HashMap.java:954)
at
org.apache.lucene.codecs.lucene45.Lucene45DocValuesProducer.ramBytesUsed(Lucene45DocValuesProducer.java:291)
at
org.apache.lucene.codecs.perfield.PerFieldDocValuesFormat$FieldsReader.ramBytesUsed(PerFieldDocValuesFormat.java:308)
at
org.apache.lucene.index.SegmentDocValues.ramBytesUsed(SegmentDocValues.java:103)
at
org.apache.lucene.index.SegmentReader.ramBytesUsed(SegmentReader.java:555)
{noformat}
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