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https://issues.apache.org/jira/browse/TUSCANY-1130?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12474900
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Hasan Muhammad commented on TUSCANY-1130:
-----------------------------------------
My suspicion is that the access route to the hashmap is more than one. In that
case synchronization of this method may not be enough. May be need to sync the
map itself. But then that is EMF code.
> Concurrent access to SDOUtil.createHelperContext() results in exception
> -----------------------------------------------------------------------
>
> Key: TUSCANY-1130
> URL: https://issues.apache.org/jira/browse/TUSCANY-1130
> Project: Tuscany
> Issue Type: Bug
> Components: Java SDO Implementation
> Affects Versions: Java-M2
> Environment: All
> Reporter: Hasan Muhammad
> Fix For: Java-M2
>
> Attachments: 1130.patch
>
>
> In tuscany runtime, when multiple apps are started simultaneously, we get an
> exception as below: This is a problem with acessing
> SDOUtil.createHelperContext(0 concurrently.
> Exception = java.util.ConcurrentModificationException
> Source = com.ibm.ws.soa.sca.admin.config.loader.SDOLoader.<INIT>
> probeid = 80
> Stack Dump = java.util.ConcurrentModificationException: concurrent access to
> HashMap attempted by Thread[server.startup : 2,5,main]
> at java.util.HashMap.onExit(HashMap.java:217)
> at java.util.HashMap.transfer(HashMap.java:514)
> at java.util.HashMap.resize(HashMap.java:500)
> at java.util.HashMap.addEntry(HashMap.java:800)
> at java.util.HashMap.put(HashMap.java:441)
> at
> com.ibm.sdo.internal.ecore.util.BasicExtendedMetaData$EPackageExtendedMetaDataImpl.getType(BasicExtendedMetaData.java:2064)
> at
> com.ibm.sdo.internal.ecore.util.BasicExtendedMetaData.getType(BasicExtendedMetaData.java:115)
> at
> com.ibm.sdo.internal.xsd.ecore.XSDEcoreBuilder.populateTypeToTypeObjectMap(XSDEcoreBuilder.java:108)
> at
> org.apache.tuscany.sdo.helper.SDOXSDEcoreBuilder.<init>(SDOXSDEcoreBuilder.java:61)
> at
> org.apache.tuscany.sdo.helper.XSDHelperImpl.<init>(XSDHelperImpl.java:79)
> at
> org.apache.tuscany.sdo.helper.XSDHelperImpl.<init>(XSDHelperImpl.java:94)
> at
> org.apache.tuscany.sdo.helper.HelperContextImpl.<init>(HelperContextImpl.java:48)
> at
> org.apache.tuscany.sdo.helper.HelperContextImpl.<init>(HelperContextImpl.java:52)
> at
> org.apache.tuscany.sdo.util.SDOUtil.createHelperContext(SDOUtil.java:299)
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