Chetan Mehrotra created OAK-4096:
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Summary: Limit the number of times a LuceneResultRow based
iterator get reset
Key: OAK-4096
URL: https://issues.apache.org/jira/browse/OAK-4096
Project: Jackrabbit Oak
Issue Type: Improvement
Components: lucene
Reporter: Chetan Mehrotra
Assignee: Chetan Mehrotra
Priority: Minor
Fix For: 1.6
With changes done in OAK-2569 it can happen that the cursor returned by
{{LucenePropertyIndex}} gets reset multiple times as the index gets updated for
a long running query
{noformat}
11697: 26.02.2016 16:12:16.296 *DEBUG* [qtp567069427-14229]
org.apache.jackrabbit.oak.plugins.index.lucene.LuceneIndex ... took 3690 ms
47507: 26.02.2016 16:13:26.744 *DEBUG* [qtp567069427-14229]
org.apache.jackrabbit.oak.plugins.index.lucene.LuceneIndex loading the next
12800 entries for query :fulltext:foo
47513: 26.02.2016 16:13:30.486 *DEBUG* [qtp567069427-14229]
org.apache.jackrabbit.oak.plugins.index.lucene.LuceneIndex ... took 3742 ms
55832: 26.02.2016 16:15:43.693 *DEBUG* [qtp567069427-14229]
org.apache.jackrabbit.oak.plugins.index.lucene.LuceneIndex loading the next
25600 entries for query :fulltext:foo
55835: 26.02.2016 16:15:51.261 *DEBUG* [qtp567069427-14229]
org.apache.jackrabbit.oak.plugins.index.lucene.LuceneIndex ... took 7568 ms
59383: 26.02.2016 16:21:12.355 *DEBUG* [qtp567069427-14229]
org.apache.jackrabbit.oak.plugins.index.lucene.LuceneIndex Change in index
version detected 4186634 => 4186631. Query would be performed without offset
59384: 26.02.2016 16:21:12.355 *DEBUG* [qtp567069427-14229]
org.apache.jackrabbit.oak.plugins.index.lucene.LuceneIndex loading the first
51200 entries for query :fulltext:foo
{noformat}
If the index continuously gets updated then such a query would never finish and
would consume system resources. For such case we should enforce some limit
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