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https://issues.apache.org/jira/browse/LUCENE-5923?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14121249#comment-14121249
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Sam Halliday commented on LUCENE-5923:
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another workaround appears to be to synchronize all writes :-/
> cannot re-use Field in 4.7.2
> ----------------------------
>
> Key: LUCENE-5923
> URL: https://issues.apache.org/jira/browse/LUCENE-5923
> Project: Lucene - Core
> Issue Type: Bug
> Reporter: Sam Halliday
>
> I get an exception "first position increment must be > 0 (got 0) for field
> ..." when I try to re-use a Field as an entry in a Document. Snippet below.
> This works ok on lucene 4.9, but I have to go back to 4.7 for Java 6
> compatibility.
> Workaround is to not re-use the same object in each Document.
> (this is Scala)
> private val TypeField = new StringField("TYPE", clazz.getSimpleName,
> Store.YES)
> final def toDocument(t: T): Document = {
> val doc = new Document
> // Lucene 4.7.2 bug: re-using the common object gives
> // "first position increment must be > 0 (got 0) for field 'TYPE'"
> //doc.add(TypeField)
> doc.add(new StringField("TYPE", clazz.getSimpleName, Store.YES))
> doc.add(new StringField("ID", id(t), Store.NO))
> doc
> }
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