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https://issues.apache.org/jira/browse/LUCENE-6297?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14338036#comment-14338036
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Toke Eskildsen commented on LUCENE-6297:
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(My previous comment was lost? Strange...)
Anyway, while I did run a code snippet to verify my findings, I made a mistake
and wrote something to the effect of {{double DEFAULT=Long.MAX_VALUE ; int
MAX=(long)DEFAULT*1024*1024}} instead of {{double DEFAULT=Long.MAX_VALUE ; int
MAX=(long)(DEFAULT*1024*1024)}}. The missing parantheses meant that the cast to
long was done on {{DEFAULT}} instead of the full expression.
False alarm. I apologize for the inconvenience.
> LogByteSizeMergePolicy maxMergeSizeForForcedMerge default is negative
> ---------------------------------------------------------------------
>
> Key: LUCENE-6297
> URL: https://issues.apache.org/jira/browse/LUCENE-6297
> Project: Lucene - Core
> Issue Type: Bug
> Affects Versions: 4.10.3, 5.0
> Reporter: Toke Eskildsen
> Priority: Minor
> Fix For: Trunk, 5.1
>
> Attachments: SOLR-7163.patch
>
>
> The default value for {{maxMergeSizeForForcedMerge}} in the class
> {{LogByteSizeMergePolicy}} is {{Long.MAX_VALUE*1024*1024}} which overflows
> and becomes -1048576.
> As far as I can see this results in forced merges always failing to merge,
> but frankly this is so far from my area of interest that I will not take the
> time to create a proper unit test.
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