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https://issues.apache.org/jira/browse/LUCENE-985?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12520727
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Michael McCandless commented on LUCENE-985:
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> As a clarification point for people who stumble upon this issue
> years from now after encountering whatever exception we put in place
> of the current one...why is there a max termText length?
This is because DocumentsWriter packs the term text for each unique
term seen into a pool of char[] blocks of 16384 chars each (to avoid
GC overhead of each separate String). So, every time a new term is
seen, it puts it at the end of the current block; when there's not
enough space it allocates another block from the pool. So a given
term must fit entirely into a single block.
> AIOOB thrown when length of termText is longer than 16384 characters
> (ArrayIndexOutOfBoundsException)
> -----------------------------------------------------------------------------------------------------
>
> Key: LUCENE-985
> URL: https://issues.apache.org/jira/browse/LUCENE-985
> Project: Lucene - Java
> Issue Type: Bug
> Components: Index
> Affects Versions: 2.3
> Reporter: Michael McCandless
> Assignee: Michael McCandless
> Priority: Minor
> Fix For: 2.3
>
>
> DocumentsWriter has a max term length of 16384; if you cross that you
> get an unfriendly ArrayIndexOutOfBoundsException. We should fix to raise a
> clearer exception.
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