[jira] [Resolved] (JENA-1302) Intermittent Lucene prepareCommit exception during heavy read/write load

["Andy Seaborne (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/JENA-1302?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andy Seaborne resolved JENA-1302.
---------------------------------
       Resolution: Fixed
    Fix Version/s: Jena 3.3.0

> Intermittent Lucene prepareCommit exception during heavy read/write load
> ------------------------------------------------------------------------
>
>                 Key: JENA-1302
>                 URL: https://issues.apache.org/jira/browse/JENA-1302
>             Project: Apache Jena
>          Issue Type: Bug
>          Components: Fuseki, TDB, Text
>    Affects Versions: Jena 3.3.0
>         Environment: CentOS 7.3 inside VM, 2 cores, OpenJDK 1.8.0_121 (64-bit), 1GB JVM heap, Fuseki running as service
>            Reporter: Vilnis Termanis (Iotic Labs)
>            Assignee: Andy Seaborne
>             Fix For: Jena 3.3.0
>
>         Attachments: prepareCommit_error.tgz
>
>
> (*Note*: Could not add Fuseki 2.6.0 as affected version although I assume this is a TDB/text rather than Fuseki-related issue.)
> *Steps:*
> # Start with plain Fuseki + given configuration (TDB store + lucene text indexing)
> # Import 1k.ttl
> # Run lockup.py (same host, mix of multiple parallel updates & single select)
> *Result:*
> Every now and again one of the update queries fails with a 500 server error which is logged as:
> {{DatasetGraphText ERROR Exception in prepareCommit: prepareCommit was already called with no corresponding call to commit}}
> *Notes:*
> - Not reproducible without fix for JENA-1296 (and discovered during fix verification for said issue)
> - Run with [apache-jena-fuseki-2.6.0-20170228.233930-10.tar.gz|https://repository.apache.org/content/repositories/snapshots/org/apache/jena/apache-jena-fuseki/2.6.0-SNAPSHOT/apache-jena-fuseki-2.6.0-20170228.233930-10.tar.gz]
> - From cold-start of Fuseki, occurs within 30s of script run
> - Supplied test script required Python 3, {{rdflib>=4.2.2}} & {{SPARQLWrapper>=1.8.0}}



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