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https://issues.apache.org/jira/browse/LUCENE-9500?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17189741#comment-17189741
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Uwe Schindler edited comment on LUCENE-9500 at 9/2/20, 10:16 PM:
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Hi,
will report this one tomorrow morning after waking up. I found another
workaround, which - unfortunately - does not work. The alternative is to use a
ByteBuffer, where the code in native c code looks fine. But unfortunately it
won't work with heap-based ByteBuffer: If the buffer has an array / is not
direct, it calls the same method that ignores offset.
So I'd suggest to arraycopy the code to beginning of byte[] as workaround.
It may take years until this is fixed, especially not in Java 8, not Java 11!
[~jpountz]: The only workaround is: Copy the dictionary to a fresh byte array
to offset 0 and use the methods without offset.
was (Author: thetaphi):
Hi,
will report this one tomorrow morning after waking up. I found another
workaround, which - unfortunately - does not work. The alternative is to use a
ByteBuffer, where the code in native c code looks fine. But unfortunately it
won't work with heap-based ByteBuffer: If the buffer has an array / is not
direct, it calls the same method that ignores heap.
So I'd suggest to arraycopy the code to beginning of byte[] as workaround.
It may take years until this is fixed, especially not in Java 8, not Java 11!
[~jpountz]: The only workaround is: Copy the dictionary to a fresh byte array
to offset 0 and use the methods without offset.
> Did we hit a DEFLATE bug?
> -------------------------
>
> Key: LUCENE-9500
> URL: https://issues.apache.org/jira/browse/LUCENE-9500
> Project: Lucene - Core
> Issue Type: Bug
> Reporter: Adrien Grand
> Priority: Minor
> Attachments: PresetDictTest.java, test_data.txt
>
>
> I've been digging
> [https://ci-builds.apache.org/job/Lucene/job/Lucene-Solr-NightlyTests-master/23/]
> all day and managed to isolate a simple reproduction that shows the problem.
> I've been starring at it all day and can't find what we are doing wrong,
> which makes me wonder whether we're calling DEFLATE the wrong way or whether
> we hit a DEFLATE bug. I've looked at it so much that I may be missing the
> most obvious stuff.
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