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https://issues.apache.org/jira/browse/LUCENE-7629?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15819481#comment-15819481
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Mike Drob commented on LUCENE-7629:
-----------------------------------
I suspect it might be a JVM issue with nothing that we can do to fix it, but
couldn't find any other JIRAs reporting the same thing so it made sense to
create one.
> ClassCastException in BytesStore.ramBytesUsed
> ---------------------------------------------
>
> Key: LUCENE-7629
> URL: https://issues.apache.org/jira/browse/LUCENE-7629
> Project: Lucene - Core
> Issue Type: Bug
> Affects Versions: 4.10.3
> Environment: Oracle jdk1.8.0_74 (64-bit) with G1GC
> Reporter: Mike Drob
>
> {code}
> Caused by: java.lang.ClassCastException: [I cannot be cast to [B
> at
> org.apache.lucene.util.fst.BytesStore.ramBytesUsed(BytesStore.java:478)
> at org.apache.lucene.util.fst.FST.ramBytesUsed(FST.java:436)
> at
> org.apache.lucene.codecs.blocktree.FieldReader.ramBytesUsed(FieldReader.java:187)
> at
> org.apache.lucene.codecs.blocktree.BlockTreeTermsReader.ramBytesUsed(BlockTreeTermsReader.java:309)
> at
> org.apache.lucene.codecs.perfield.PerFieldPostingsFormat$FieldsReader.ramBytesUsed(PerFieldPostingsFormat.java:238)
> at
> org.apache.lucene.index.SegmentCoreReaders.ramBytesUsed(SegmentCoreReaders.java:226)
> at
> org.apache.lucene.index.SegmentReader.ramBytesUsed(SegmentReader.java:614)
> at
> org.apache.solr.handler.admin.LukeRequestHandler.getIndexHeapUsed(LukeRequestHandler.java:579)
> at
> org.apache.solr.handler.admin.LukeRequestHandler.getIndexInfo(LukeRequestHandler.java:558)
> at
> org.apache.solr.handler.admin.CoreAdminHandler.getCoreStatus(CoreAdminHandler.java:1135)
> at
> org.apache.solr.handler.admin.CoreAdminHandler.handleStatusAction(CoreAdminHandler.java:699)
> ... 29 more
> {code}
> Saw this running Solr on a patched 4.10.3.
> I have not been able to reproduce this, but it seems similar to what was
> reported at https://discuss.elastic.co/t/strange-marvel-exception/36112
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