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From "Yonik Seeley (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (SOLR-10115) Corruption in read-side of SOLR-HDFS stack
Date Wed, 22 Feb 2017 01:16:44 GMT

     [ https://issues.apache.org/jira/browse/SOLR-10115?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Yonik Seeley reassigned SOLR-10115:
-----------------------------------

    Assignee: Yonik Seeley

> Corruption in read-side of SOLR-HDFS stack
> ------------------------------------------
>
>                 Key: SOLR-10115
>                 URL: https://issues.apache.org/jira/browse/SOLR-10115
>             Project: Solr
>          Issue Type: Bug
>      Security Level: Public(Default Security Level. Issues are Public) 
>    Affects Versions: 4.4
>            Reporter: Yonik Seeley
>            Assignee: Yonik Seeley
>         Attachments: YCS_HdfsTest.java
>
>
> I've been trying to track down some random AIOOB exceptions in Lucene for a customer,
and I've managed to reproduce the issue with a unit test of sufficient size in conjunction
with highly concurrent read requests.
> A typical stack trace looks like:
> {code}
> org.apache.solr.common.SolrException; java.lang.ArrayIndexOutOfBoundsException: 172033655
>         at org.apache.lucene.codecs.lucene40.BitVector.get(BitVector.java:149)
>         at org.apache.lucene.codecs.lucene41.Lucene41PostingsReader$BlockDocsEnum.nextDoc(Lucene41PostingsReader.java:455)
>         at org.apache.lucene.search.MultiTermQueryWrapperFilter.getDocIdSet(MultiTermQueryWrapperFilter.java:111)
>         at org.apache.lucene.search.ConstantScoreQuery$ConstantWeight.scorer(ConstantScoreQuery.java:157)
> {code}
> The number of unique stack traces is relatively high, most AIOOB exceptions, but some
EOF.  Most exceptions occur in the term index, however I believe this may be just an artifact
of where highly concurrent access is most likely to occur.  The queries that triggered this
had many wildcards and other multi-term queries.



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