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https://issues.apache.org/jira/browse/JENA-597?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13832914#comment-13832914
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Andy Seaborne edited comment on JENA-597 at 11/26/13 7:23 PM:
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The fix to JENA-467 should fix the situation.
The stacktrace line numbers do not align with Jena 2.11.0. They do align with
Jena 2.10.1
The cache is per IRIResolverNormal object and (see code) the call to
resolveSilent is protected by a lock in 2.11.0, but not in 2.10.1.
was (Author: andy.seaborne):
The fix to JENA-467 should fix the situation.
The stacktrace line numbers do not align with Jena 2.11.0 They do align with
Jena 2.10.1
The cache is per IRIResolverNormal object and (see code) the call to
resolveSilent is protected by a lock in 2.11.0, but not in 2.10.1.
> IRIResolverNormal needs thread safe CacheLRU
> --------------------------------------------
>
> Key: JENA-597
> URL: https://issues.apache.org/jira/browse/JENA-597
> Project: Apache Jena
> Issue Type: Bug
> Components: ARQ
> Affects Versions: Jena 2.11.0
> Environment: Any IBM JRE 7 or higher
> Reporter: Scott Patterson
> Attachments: IRIResolverTest.java
>
>
> The following exception may occur when more than one thread requires access
> to the org.apache.jena.atlas.lib.cache.CacheLRU embedded in IRIResolverNormal:
> Caused by: java.lang.NullPointerException
> at java.util.LinkedHashMap.get(LinkedHashMap.java:339)
> at org.apache.jena.atlas.lib.cache.CacheLRU.get(CacheLRU.java:53)
> at
> org.apache.jena.riot.system.IRIResolver$IRIResolverNormal.resolveSilent(IRIResolver.java:427)
> at
> org.apache.jena.riot.system.IRIResolver$IRIResolverNormal.<init>(IRIResolver.java:383)
> at org.apache.jena.riot.system.IRIResolver.create(IRIResolver.java:210)
> at org.apache.jena.riot.system.RiotLib.profile(RiotLib.java:141)
> at org.apache.jena.riot.system.RiotLib.profile(RiotLib.java:130)
> at org.apache.jena.riot.lang.LangRDFXML.<init>(LangRDFXML.java:104)
> at org.apache.jena.riot.lang.LangRDFXML.create(LangRDFXML.java:74)
> at org.apache.jena.riot.RiotReader.createParser(RiotReader.java:128)
> at
> org.apache.jena.riot.RDFParserRegistry$ReaderRIOTFactoryImpl$1.read(RDFParserRegistry.java:141)
> at org.apache.jena.riot.RDFDataMgr.process(RDFDataMgr.java:818)
> at org.apache.jena.riot.RDFDataMgr.read(RDFDataMgr.java:258)
> at org.apache.jena.riot.RDFDataMgr.read(RDFDataMgr.java:244)
> at
> org.apache.jena.riot.adapters.RDFReaderRIOT.read(RDFReaderRIOT.java:69)
> at com.ibm.team.jis.lqe.resource.RDFEntity.getModel(RDFEntity.java:361)
> ... 39 more
> This may be related to the problem reported that is suppose to be fixed by
> the cloned issue. It looks to be the same stack trace. I've attached a test
> to reproduce. Works with Oracle 7 JRE but not IBM 7.
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